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class="vector-toc-numb">2</span> <span>Causes</span> </div> </a> <button aria-controls="toc-Causes-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Causes subsection</span> </button> <ul id="toc-Causes-sublist" class="vector-toc-list"> <li id="toc-Ischemic" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ischemic"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Ischemic</span> </div> </a> <ul id="toc-Ischemic-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Inflammatory" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Inflammatory"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Inflammatory</span> </div> </a> <ul id="toc-Inflammatory-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Compressive" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Compressive"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Compressive</span> </div> </a> <ul id="toc-Compressive-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Infiltrative" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Infiltrative"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Infiltrative</span> </div> </a> <ul id="toc-Infiltrative-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Traumatic" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Traumatic"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>Traumatic</span> </div> </a> <ul id="toc-Traumatic-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mitochondrial" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mitochondrial"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.6</span> <span>Mitochondrial</span> </div> </a> <ul id="toc-Mitochondrial-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Nutritional" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Nutritional"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.7</span> <span>Nutritional</span> </div> </a> <ul id="toc-Nutritional-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Toxins" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Toxins"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.8</span> <span>Toxins</span> </div> </a> <ul id="toc-Toxins-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hereditary" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Hereditary"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.9</span> <span>Hereditary</span> </div> </a> <ul id="toc-Hereditary-sublist" 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</ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc 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interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/O%C4%8Dna_neuropatija" title="Očna neuropatija – Bosnian" lang="bs" hreflang="bs" data-title="Očna neuropatija" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Neuropat%C3%ADa_%C3%B3ptica" title="Neuropatía óptica – Spanish" lang="es" hreflang="es" data-title="Neuropatía óptica" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Neuropatia_ottica" title="Neuropatia ottica – Italian" lang="it" hreflang="it" data-title="Neuropatia ottica" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%92%E0%B4%AA%E0%B5%8D%E0%B4%9F%E0%B4%BF%E0%B4%95%E0%B5%8D_%E0%B4%A8%E0%B5%8D%E0%B4%AF%E0%B5%82%E0%B4%B1%E0%B5%8B%E0%B4%AA%E0%B5%8D%E0%B4%AA%E0%B4%A4%E0%B4%BF" title="ഒപ്ടിക് ന്യൂറോപ്പതി – Malayalam" lang="ml" hreflang="ml" data-title="ഒപ്ടിക് ന്യൂറോപ്പതി" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Neuropatia_nerwu_wzrokowego" title="Neuropatia nerwu wzrokowego – Polish" lang="pl" hreflang="pl" data-title="Neuropatia nerwu wzrokowego" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Neuropatia_%C3%B3ptica" title="Neuropatia óptica – Portuguese" lang="pt" hreflang="pt" data-title="Neuropatia óptica" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%D0%BF%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D0%BD%D0%B5%D0%B9%D1%80%D0%BE%D0%BF%D0%B0%D1%82%D0%B8%D1%8F" title="Оптическая нейропатия – Russian" lang="ru" hreflang="ru" data-title="Оптическая нейропатия" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%9E%D0%BF%D1%82%D0%B8%D0%BA_%D0%BD%D0%B5%D0%B9%D1%80%D0%BE%D0%BF%D0%B0%D1%82%D0%B8%D1%8F" title="Оптик нейропатия – Tatar" lang="tt" hreflang="tt" data-title="Оптик нейропатия" data-language-autonym="Татарча / tatarça" 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id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Optic_atrophy&redirect=no" class="mw-redirect" title="Optic atrophy">Optic atrophy</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p class="mw-empty-elt"> </p> <div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Medical condition</div><style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox ib-medical-condition"><tbody><tr><th colspan="2" class="infobox-above" style="background:#ccc">Optic neuropathy</th></tr><tr><th scope="row" class="infobox-label">Other names</th><td class="infobox-data">Optic nerve disorder</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medical_specialty" title="Medical specialty">Specialty</a></th><td class="infobox-data">Neurology, Ophthalmology</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Signs_and_symptoms" title="Signs and symptoms">Symptoms</a></th><td class="infobox-data">Vision loss, reduced color vision, blurred vision</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Complication_(medicine)" title="Complication (medicine)">Complications</a></th><td class="infobox-data">Permanent vision loss, blindness</td></tr><tr><th scope="row" class="infobox-label">Usual onset</th><td class="infobox-data">Sudden or gradual</td></tr><tr><th scope="row" class="infobox-label">Duration</th><td class="infobox-data">Variable, depending on cause</td></tr><tr><th scope="row" class="infobox-label">Types</th><td class="infobox-data">Ischemic optic neuropathy, optic neuritis, traumatic optic neuropathy, hereditary optic neuropathy</td></tr><tr><th scope="row" class="infobox-label">Causes</th><td class="infobox-data">Vascular issues, inflammation, trauma, toxins, genetic mutations (e.g., Leber's hereditary optic neuropathy)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Risk_factor" title="Risk factor">Risk factors</a></th><td class="infobox-data">Age, smoking, cardiovascular disease, genetic predisposition</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medical_diagnosis" title="Medical diagnosis">Diagnostic method</a></th><td class="infobox-data">Clinical evaluation, visual field tests, optical coherence tomography, MRI</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Differential_diagnosis" title="Differential diagnosis">Differential diagnosis</a></th><td class="infobox-data">Glaucoma, retinal disease, brain lesions</td></tr><tr><th scope="row" class="infobox-label">Prevention</th><td class="infobox-data">Managing risk factors like blood pressure, avoiding smoking, regular eye exams</td></tr><tr><th scope="row" class="infobox-label">Treatment</th><td class="infobox-data">Addressing underlying cause (e.g., steroids for inflammation,<sup id="cite_ref-Stunkel_2018_1-0" class="reference"><a href="#cite_note-Stunkel_2018-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> surgery for trauma), vision rehabilitation</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medication" title="Medication">Medication</a></th><td class="infobox-data">Corticosteroids (for optic neuritis), other medications depending on the cause</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Prognosis" title="Prognosis">Prognosis</a></th><td class="infobox-data">Variable; some cases recover, others lead to permanent vision loss</td></tr><tr><th scope="row" class="infobox-label">Frequency</th><td class="infobox-data">Common in individuals with risk factors (e.g., older adults, smokers)</td></tr><tr><th scope="row" class="infobox-label">Deaths</th><td class="infobox-data">None directly from optic neuropathy, but complications from underlying causes (e.g., stroke) can be fatal</td></tr></tbody></table> <p><b>Optic neuropathy</b> is damage to the <a href="/wiki/Optic_nerve" title="Optic nerve">optic nerve</a> from any cause. The optic nerve is a bundle of millions of fibers in the retina that sends visual signals to the brain. </p><p>Damage and death of these nerve cells, or neurons, leads to characteristic features of optic neuropathy. The main symptom is loss of vision, with colors appearing subtly washed out in the affected eye. A pale disc is characteristic of long-standing optic neuropathy. In many cases, only one eye is affected and a person may not be aware of the loss of color vision until the examiner asks them to cover the healthy eye. </p><p>Optic neuropathy is often called optic atrophy, to describe the loss of some or most of the fibers of the optic nerve. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Signs_and_symptoms">Signs and symptoms</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=1" title="Edit section: Signs and symptoms"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The main symptom is loss of vision, with colors appearing subtly washed out in the affected eye. In many cases, only one eye is affected and the person may not be aware of the loss of color vision until the examiner asks them to cover the healthy eye. People may also engage in "eccentric viewing" using peripheral vision to compensate for central vision loss characteristic in genetic, toxic, or nutritional optic neuropathy. </p><p>On examination of the fundus, a pale optic disc is characteristic of long-standing optic neuropathy. </p> <div class="mw-heading mw-heading2"><h2 id="Causes">Causes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=2" title="Edit section: Causes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Optic_nerve" title="Optic nerve">optic nerve</a> contains <a href="/wiki/Axons" class="mw-redirect" title="Axons">axons</a> of nerve cells that emerge from the <a href="/wiki/Retina" title="Retina">retina</a>, leave the eye at the <a href="/wiki/Optic_disc" title="Optic disc">optic disc</a>, and go to the <a href="/wiki/Visual_cortex" title="Visual cortex">visual cortex</a> where input from the eye is processed into vision. There are 1.2 million optic nerve fibers that derive from the <a href="/wiki/Retinal_ganglion_cells" class="mw-redirect" title="Retinal ganglion cells">retinal ganglion cells</a> of the inner retina.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Damage to the optic nerve can have different causes: </p> <div class="mw-heading mw-heading3"><h3 id="Ischemic">Ischemic</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=3" title="Edit section: Ischemic"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In ischemic optic neuropathies, there is insufficient blood flow (ischemia) to the optic nerve. The anterior optic nerve is supplied by the short posterior ciliary artery and choroidal circulation, while the retrobulbar optic nerve is supplied intraorbitally by a pial plexus, which arises from the ophthalmic artery, internal carotid artery, anterior cerebral artery, and anterior communicating arteries. Ischemic optic neuropathies are classified based on the location of the damage and the cause of reduced blood flow if known.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <ul><li><a href="/wiki/Anterior_ischemic_optic_neuropathy" title="Anterior ischemic optic neuropathy">Anterior ischemic optic neuropathy</a> (AION) includes diseases that affect the optic nerve head and cause swelling of the optic disc. These diseases often cause sudden rapid visual loss in one eye. Inflammatory diseases of the blood vessels, like <a href="/wiki/Giant-cell_arteritis" class="mw-redirect" title="Giant-cell arteritis">giant-cell arteritis</a>, <a href="/wiki/Polyarteritis_nodosa" title="Polyarteritis nodosa">polyarteritis nodosa</a>, <a href="/wiki/Eosinophilic_granulomatosis_with_polyangiitis" title="Eosinophilic granulomatosis with polyangiitis">eosinophilic granulomatosis with polyangiitis</a>, <a href="/wiki/Granulomatosis_with_polyangiitis" title="Granulomatosis with polyangiitis">granulomatosis with polyangiitis</a>, and rheumatoid arthritis can cause arteritic AIONs (AAION). The vast majority of AIONs are nonarteritic AIONs (NAION). The most common acute optic neuropathy in patients over 50 years of age, NAION has an annual incidence of 2.3-10.2/100,000. NAION presents as a painless loss of vision, often when awakening, that occurs over hours to days. Most patients lose the lower half of their visual field (an inferior altitudinal loss), though superior altitudinal loss is also common. The pathophysiology of NAION is unknown, but it is related to poor circulation in the optic nerve head. NAION is often associated with diabetes mellitus, elevated intraocular pressure (acute glaucoma, eye surgery), high cholesterol, hypercoagulable states, a drop in blood pressure (bleeding, cardiac arrest, peri-operative esp. cardiac and spine procedures), and sleep apnea. Rarely, amiodarone, interferon-alpha, and erectile dysfunction drugs have been associated with this disease.</li> <li><a href="/wiki/Posterior_ischemic_optic_neuropathy" title="Posterior ischemic optic neuropathy">Posterior ischemic optic neuropathy</a> is a syndrome of sudden visual loss with optic neuropathy without initial disc swelling with subsequent development of optic atrophy. This can occur in patients who are predisposed to AAION and NAION as described above as well as those who had cardiac and spine surgery or serious episodes of hypotension.</li> <li>Radiation optic neuropathy (RON) is also thought to be due to ischemia of the optic nerve that occurs 3 months to 8 or more years after radiation therapy to the brain and orbit. It occurs most often around 1.5 years after treatment and results in irreversible and severe vision loss, which may also be associated with damage to the retina (radiation retinopathy). This is thought to be due to damage to dividing glial and vascular endothelial cells. RON can present with a transient visual loss followed by an acute painless visual loss in one or both eyes several weeks later. The risk of RON is significantly increased with radiation doses over 50 Gy.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Inflammatory">Inflammatory</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=4" title="Edit section: Inflammatory"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Optic_neuritis" title="Optic neuritis">Optic neuritis</a> is inflammation of the optic nerve, which is associated with swelling and destruction of the myelin sheath covering the optic nerve. Young adults, usually females, are most commonly affected. Symptoms of optic neuritis in the affected eye include pain on eye movement, sudden loss of vision, and decrease in color vision (especially reds). Optic neuritis, when combined with the presence of multiple demyelinating white matter brain lesions on MRI, is suspicious for <a href="/wiki/Multiple_sclerosis" title="Multiple sclerosis">multiple sclerosis</a>. </p><p>Several causes and clinical courses are possible for the optic neuritis. It can be classified in: </p> <ul><li>Single isolated optic neuritis (SION)</li> <li>relapsing isolated optic neuritis (RION)</li> <li><a href="/wiki/Chronic_relapsing_inflammatory_optic_neuropathy" title="Chronic relapsing inflammatory optic neuropathy">chronic relapsing inflammatory optic neuropathy</a> (CRION)</li> <li>the neuromyelitis optica (NMO) spectrum disorder</li> <li>multiple sclerosis associated optic neuritis (MSON)</li> <li>unclassified optic neuritis (UCON) forms.<sup id="cite_ref-pmid24424177_4-0" class="reference"><a href="#cite_note-pmid24424177-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li></ul> <p>Medical examination of the optic nerve with an ophthalmoscope may reveal a swollen optic nerve, but the nerve may also appear normal. Presence of an <a href="/wiki/Afferent_pupillary_defect" class="mw-redirect" title="Afferent pupillary defect">afferent pupillary defect</a>, decreased color vision, and visual field loss (often central) are suggestive of optic neuritis. Recovery of visual function is expected within 10 weeks. However, attacks may lead to permanent axonal loss and thinning of the retinal nerve fiber layer. </p> <div class="mw-heading mw-heading3"><h3 id="Compressive">Compressive</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=5" title="Edit section: Compressive"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Tumors, infections, and inflammatory processes can cause lesions within the orbit and, less commonly, the optic canal. These lesions may compress the optic nerve, resulting optic disc swelling and progressive visual loss. Implicated orbital disorders include optic gliomas, meningiomas, hemangiomas, lymphangiomas, dermoid cysts, carcinoma, lymphoma, multiple myeloma, inflammatory orbital pseudotumor, and thyroid ophthalmopathy. Patients often have bulging out of the eye (proptosis) with mild color deficits and almost normal vision with disc swelling. </p> <div class="mw-heading mw-heading3"><h3 id="Infiltrative">Infiltrative</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=6" title="Edit section: Infiltrative"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The optic nerve can be infiltrated by a variety of processes, including tumors, inflammation, and infections. Tumors that can infiltrate the optic nerve can be primary (optic gliomas, capillary hemangiomas, and cavernous hemangiomas) or secondary (metastatic carcinoma, nasopharyngeal carcinoma, lymphoma, and leukemia). The most common inflammatory disorder that infiltrates the optic nerve is <a href="/wiki/Sarcoidosis" title="Sarcoidosis">sarcoidosis</a>. Opportunistic fungi, viruses, and bacteria may also infiltrate the optic nerve. The optic nerve may be elevated if the infiltration occurs in the proximal portion of the nerve. The appearance of the nerve on examination depends on the portion of the nerve that is affected. </p> <div class="mw-heading mw-heading3"><h3 id="Traumatic">Traumatic</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=7" title="Edit section: Traumatic"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The optic nerve can be damaged when exposed to direct or indirect injury. Direct optic nerve injuries are caused by trauma to the head or orbit that crosses normal tissue planes and disrupts the anatomy and function of the optic nerve; e.g., a bullet or forceps that physically injures the optic nerve. Indirect injuries, like blunt trauma to the forehead during a motor vehicle accident, transmit force to the optic nerve without transgressing tissue planes. This type of force causes the optic nerve to absorb excess energy at the time of impact. The most common site of injury of the optic nerve is the intracanalicular portion of the nerve. Deceleration injuries from motor vehicle or bicycle accidents account for 17 to 63 percent of cases. Falls are also a common cause, and optic neuropathy most commonly occurs when there is a loss of consciousness associated with multi-system trauma and serious brain injury. In less than three percent of patients, an orbital hemorrhage after an injection behind the eye (retrobulbar block) can cause injury to the optic nerve, but this is readily manageable if it does not involve direct optic nerve injury and is caught early. The role of high-dose steroids and orbital decompression in treating these patients is controversial and, if administered, must be done very soon after injury with minimal effects. In patients with an orbital fracture, vomiting or <a href="/wiki/Nose_blowing" class="mw-redirect" title="Nose blowing">nose blowing</a> can force air into the orbit and possibly compromise the integrity of the optic nerve. </p> <div class="mw-heading mw-heading3"><h3 id="Mitochondrial">Mitochondrial</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=8" title="Edit section: Mitochondrial"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Mitochondrial_optic_neuropathies" title="Mitochondrial optic neuropathies">Mitochondrial optic neuropathies</a></div> <p><a href="/wiki/Mitochondria" class="mw-redirect" title="Mitochondria">Mitochondria</a> play a central role in maintaining the life cycle of retinal ganglion cells because of their high energy dependence. Mitochondria are made within the central somata of the retinal ganglion cell, transported down axons, and distributed where they are needed. Genetic mutations in mitochondrial DNA, vitamin depletion, alcohol and tobacco abuse, and use of certain drugs can cause derangements in efficient transport of mitochondria, which can cause a primary or secondary optic neuropathy.<sup id="cite_ref-pmid14766317_5-0" class="reference"><a href="#cite_note-pmid14766317-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Nutritional">Nutritional</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=9" title="Edit section: Nutritional"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A nutritional optic neuropathy may be present in a patient with obvious evidence of under-nutrition (weight loss and wasting), but also malnutrition due to picky eating as in <a href="/wiki/Autism" title="Autism">autism</a>.<sup id="cite_ref-nejm_6-0" class="reference"><a href="#cite_note-nejm-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Months of depletion are usually necessary to deplete body stores of most nutrients. Undernourished patients often have many vitamin and nutrient deficiencies and have low serum protein levels. However, the optic neuropathy associated with <a href="/wiki/Pernicious_anemia" title="Pernicious anemia">pernicious anemia</a> and vitamin B<sub>12</sub> deficiency can even be seen in well-nourished individuals. Gastric bypass surgery may also cause a vitamin B<sub>12</sub> deficiency from poor absorption. </p><p>Patients who have nutritional optic neuropathy may notice that colors are not as vivid or bright as before and that the color red is washed out. This normally occurs in both eyes at the same time and is not associated with any eye pain. They might initially notice a blur or fog, followed by a drop in vision. While vision loss may be rapid, progression to blindness is unusual. These patients tend to have blind spots in the center of their vision with preserved peripheral vision. In most cases, the pupils continue to respond normally to light. </p> <div class="mw-heading mw-heading3"><h3 id="Toxins">Toxins</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=10" title="Edit section: Toxins"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Many heavy metals and toxicants can cause optic neuropathy: </p> <ul><li>Lead, mercury, cobalt, arsenic, organic solvents, and pesticides have been reported.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li> <li>The most recognized cause of toxic optic neuropathy is <a href="/wiki/Methanol_poisoning" class="mw-redirect" title="Methanol poisoning">methanol poisoning</a>. This can be a life-threatening event that normally accidentally occurs when the person mistook or substituted, <a href="/wiki/Methanol" title="Methanol">methanol</a> for <a href="/wiki/Ethyl_alcohol" class="mw-redirect" title="Ethyl alcohol">ethyl alcohol</a>. The person initially has nausea and vomiting, followed by respiratory distress, headache, and visual loss 18–48 hours after consumption. Without treatment, people can go blind, and their pupils will dilate and stop reacting to light.</li> <li><a href="/wiki/Ethylene_glycol" title="Ethylene glycol">Ethylene glycol</a>, a component of automobile antifreeze, is a poison that is toxic to the whole body including the optic nerve. Consumption can be fatal, or recovery can occur with permanent neurologic and ophthalmologic deficits. While the visual loss is not very common, increased intracranial pressure can cause bilateral optic disc swelling from cerebral edema. A clue to the cause of intoxication is the presence of oxalate crystals in the urine. Like methanol intoxication, treatment is ethanol consumption.</li> <li><a href="/wiki/Ethambutol" title="Ethambutol">Ethambutol</a>, a drug commonly used to treat tuberculosis, is notorious for causing toxic optic neuropathy. People with vision loss from ethambutol toxicity lose vision in both eyes equally. This initially presents with problems with colors (dyschromatopsia) and can leave central visual deficits. If vision loss occurs while using ethambutol, it would be best to discontinue this medication under a doctor's supervision. Vision can improve slowly after discontinuing ethambutol but rarely returns to baseline.</li> <li><a href="/wiki/Amiodarone" title="Amiodarone">Amiodarone</a> is an antiarrhythmic medication commonly used for abnormal heart rhythms (atrial or ventricular tachyarrhythmias). Most patients on this medication get corneal epithelial deposits, but this medication has also been controversially associated with NAION. Patients on amiodarone with new visual symptoms should be evaluated by an ophthalmologist.</li> <li><a href="/wiki/Tobacco" title="Tobacco">Tobacco</a> exposure, most commonly through pipe and cigar smoking, can cause optic neuropathy. Middle-aged or elderly men are often affected and present with painless, slowly progressive, color distortion and visual loss in both eyes. The mechanism is unclear, but this has been reported to be more common in individuals who are already suffering from malnutrition.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Hereditary">Hereditary</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=11" title="Edit section: Hereditary"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The inherited optic neuropathies typically manifest asa symmetric bilateral central visual loss. Optic nerve damage in most inherited optic neuropathies is permanent and progressive. </p> <ul><li><a href="/wiki/Leber%27s_hereditary_optic_neuropathy" title="Leber's hereditary optic neuropathy">Leber's hereditary optic neuropathy (LHON)</a> is the most frequently occurring mitochondrial disease, and this inherited form of acute or subacute vision loss predominantly affects young males. LHON usually presents with rapid vision loss in one eye followed by involvement of the second eye (usually within months). Visual acuity often remains stable and poor (around or below 20/200) with a residual central visual field defect. Patients with the 14484/ND6 mutation are most likely to have visual recovery.<sup id="cite_ref-pmid8071952_8-0" class="reference"><a href="#cite_note-pmid8071952-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Dominant_optic_atrophy" class="mw-redirect" title="Dominant optic atrophy">Dominant optic atrophy</a> is an autosomal dominant disease caused by a defect in the nuclear gene OPA1. A slowly progressive optic neuropathy, dominant optic atrophy, usually presents in the first decade of life and is bilaterally symmetrical. Examination of these patients shows loss of visual acuity, temporal pallor of the optic discs, centrocecal scotomas with peripheral sparing, and subtle impairments in color vision.</li> <li><a href="/wiki/Behr%27s_syndrome" class="mw-redirect" title="Behr's syndrome">Behr's syndrome</a> is a rare autosomal recessive disorder characterized by early-onset optic atrophy, ataxia, and spasticity.</li> <li><a href="/wiki/Berk%E2%80%93Tabatznik_syndrome" title="Berk–Tabatznik syndrome">Berk–Tabatznik syndrome</a> is a condition that shows symptoms of short stature, congenital optic atrophy and brachytelephalangy. This condition is extremely rare.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Treatments">Treatments</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=12" title="Edit section: Treatments"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>While optic neuropathy cannot be outright cured, there are surgical options to alleviate pain and symptoms associated with such diseases. The Endoscopic Endonasal Approach method (EEA) is a method of relieving pressure associated with tumors formed in the brain that press upon the optic nerve. It is a minimally invasive surgery. </p><p>In genetic and developmental causes of optic neuropathy, no surgeries have been proven treatments. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=13" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Optic_neuritis" title="Optic neuritis">Optic neuritis</a></li> <li><a href="/wiki/Ophthalmoplegia" class="mw-redirect" title="Ophthalmoplegia">Ophthalmoplegia</a></li> <li><a href="/wiki/Glaucoma" title="Glaucoma">Glaucoma</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=14" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-Stunkel_2018-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Stunkel_2018_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFStunkelVan_Stavern2018" class="citation journal cs1">Stunkel L, Van Stavern GP (2018). <a rel="nofollow" class="external text" href="https://doi.org/10.22608%2FAPO.2018127">"Steroid Treatment of Optic Neuropathies"</a>. <i>Asia-Pacific Journal of Ophthalmology</i>. <b>7</b> (4). 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(March 2022). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8910489">"Toxic and Nutritional Optic Neuropathies-An Updated Mini-Review"</a>. <i>International Journal of Environmental Research and Public Health</i>. <b>19</b> (5): 3092. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.3390%2Fijerph19053092">10.3390/ijerph19053092</a></span>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8910489">8910489</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/35270784">35270784</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=International+Journal+of+Environmental+Research+and+Public+Health&rft.atitle=Toxic+and+Nutritional+Optic+Neuropathies-An+Updated+Mini-Review&rft.volume=19&rft.issue=5&rft.pages=3092&rft.date=2022-03&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC8910489%23id-name%3DPMC&rft_id=info%3Apmid%2F35270784&rft_id=info%3Adoi%2F10.3390%2Fijerph19053092&rft.aulast=Baj&rft.aufirst=J&rft.au=Forma%2C+A&rft.au=Kobak%2C+J&rft.au=Tyczy%C5%84ska%2C+M&rft.au=Dudek%2C+I&rft.au=Maani%2C+A&rft.au=Teresi%C5%84ski%2C+G&rft.au=Buszewicz%2C+G&rft.au=Januszewski%2C+J&rft.au=Flieger%2C+J&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC8910489&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOptic+neuropathy" class="Z3988"></span></span> </li> <li id="cite_note-pmid8071952-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-pmid8071952_8-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOostraBolhuisWijburgZorn-Ende1994" class="citation journal cs1">Oostra RJ, Bolhuis PA, Wijburg FA, Zorn-Ende G, Bleeker-Wagemakers EM (April 1994). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1049799">"Leber's hereditary optic neuropathy: correlations between mitochondrial genotype and visual outcome"</a>. <i>Journal of Medical Genetics</i>. <b>31</b> (4): 280–286. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fjmg.31.4.280">10.1136/jmg.31.4.280</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1049799">1049799</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/8071952">8071952</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Medical+Genetics&rft.atitle=Leber%27s+hereditary+optic+neuropathy%3A+correlations+between+mitochondrial+genotype+and+visual+outcome&rft.volume=31&rft.issue=4&rft.pages=280-286&rft.date=1994-04&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC1049799%23id-name%3DPMC&rft_id=info%3Apmid%2F8071952&rft_id=info%3Adoi%2F10.1136%2Fjmg.31.4.280&rft.aulast=Oostra&rft.aufirst=RJ&rft.au=Bolhuis%2C+PA&rft.au=Wijburg%2C+FA&rft.au=Zorn-Ende%2C+G&rft.au=Bleeker-Wagemakers%2C+EM&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC1049799&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOptic+neuropathy" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://rarediseases.info.nih.gov/gard/5109/berk-tabatznik-syndrome/resources/1">"Berk-Tabatznik syndrome"</a>. <i>Genetic and Rare Diseases Information Center (GARD)</i>. U.S. National Institutes of Health<span class="reference-accessdate">. Retrieved <span class="nowrap">28 September</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Genetic+and+Rare+Diseases+Information+Center+%28GARD%29&rft.atitle=Berk-Tabatznik+syndrome&rft_id=http%3A%2F%2Frarediseases.info.nih.gov%2Fgard%2F5109%2Fberk-tabatznik-syndrome%2Fresources%2F1&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOptic+neuropathy" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=15" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239549316">.mw-parser-output .refbegin{margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li{margin-left:0;padding-left:3.2em;text-indent:-3.2em}.mw-parser-output .refbegin-hanging-indents ul,.mw-parser-output .refbegin-hanging-indents ul li{list-style:none}@media(max-width:720px){.mw-parser-output .refbegin-hanging-indents>ul>li{padding-left:1.6em;text-indent:-1.6em}}.mw-parser-output .refbegin-columns{margin-top:0.3em}.mw-parser-output .refbegin-columns ul{margin-top:0}.mw-parser-output .refbegin-columns li{page-break-inside:avoid;break-inside:avoid-column}@media screen{.mw-parser-output .refbegin{font-size:90%}}</style><div class="refbegin" style=""> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBehbehani2007" class="citation journal cs1">Behbehani R (September 2007). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701125">"Clinical approach to optic neuropathies"</a>. <i>Clinical Ophthalmology</i>. <b>1</b> (3). Auckland, N.Z.: 233–246. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.2147%2Fopth">10.2147/opth</a></span>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701125">2701125</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/19668477">19668477</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Clinical+Ophthalmology&rft.atitle=Clinical+approach+to+optic+neuropathies&rft.volume=1&rft.issue=3&rft.pages=233-246&rft.date=2007-09&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC2701125%23id-name%3DPMC&rft_id=info%3Apmid%2F19668477&rft_id=info%3Adoi%2F10.2147%2Fopth&rft.aulast=Behbehani&rft.aufirst=R&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC2701125&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOptic+neuropathy" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWilhelmSchabet2015" class="citation journal cs1">Wilhelm H, Schabet M (September 2015). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4581115">"The Diagnosis and Treatment of Optic Neuritis"</a>. <i>Deutsches Ärzteblatt International</i>. <b>112</b> (37): 616–25, quiz 626. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.3238%2Farztebl.2015.0616">10.3238/arztebl.2015.0616</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4581115">4581115</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/26396053">26396053</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Deutsches+%C3%84rzteblatt+International&rft.atitle=The+Diagnosis+and+Treatment+of+Optic+Neuritis&rft.volume=112&rft.issue=37&rft.pages=616-25%2C+quiz+626&rft.date=2015-09&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC4581115%23id-name%3DPMC&rft_id=info%3Apmid%2F26396053&rft_id=info%3Adoi%2F10.3238%2Farztebl.2015.0616&rft.aulast=Wilhelm&rft.aufirst=H&rft.au=Schabet%2C+M&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC4581115&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOptic+neuropathy" class="Z3988"></span></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Optic_neuropathy&action=edit&section=16" title="Edit section: External links"><span>edit</span></a><span 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style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;background: #EAECF0;color:black;">Classification</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><div style="position:relative; float:right; font-size:0.8em;"><a href="https://www.wikidata.org/wiki/Q2879095" class="extiw" title="d:Q2879095">D</a></div><div class="hlist" style="text-align:left;"><ul><li><b><a href="/wiki/International_Statistical_Classification_of_Diseases_and_Related_Health_Problems" class="mw-redirect" title="International Statistical Classification of Diseases and Related Health Problems">ICD</a>-<a href="/wiki/ICD-10" title="ICD-10">10</a></b>: <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/H46">H46</a></li><li><b><a href="/wiki/Medical_Subject_Headings" title="Medical Subject Headings">MeSH</a></b>: <a rel="nofollow" class="external text" href="https://meshb.nlm.nih.gov/record/ui?ui=D009901">D009901</a></li></ul></div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background: #EAECF0;color:black;">External resources</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><div class="hlist" style="text-align:left;"><ul><li><b><a href="/wiki/MedlinePlus" title="MedlinePlus">MedlinePlus</a></b>: <a rel="nofollow" class="external text" href="https://www.nlm.nih.gov/medlineplus/ency/article/001622.htm">001622</a></li><li><b><a href="/wiki/Patient_UK" title="Patient UK">Patient UK</a></b>: <a rel="nofollow" class="external text" href="https://patient.info/doctor/Optic-Atrophy">Optic neuropathy</a></li></ul></div></div></td></tr></tbody></table></div> <ul><li><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=optic+atrophy/">NCBI Genetic Testing Registry</a></li></ul> <div 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structures">Adnexa</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Eyelid" title="Eyelid">Eyelid</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Inflammation" scope="row" class="navbox-group" style="width:1%">Inflammation</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Stye" title="Stye">Stye</a></li> <li><a href="/wiki/Chalazion" title="Chalazion">Chalazion</a></li> <li><a href="/wiki/Blepharitis" title="Blepharitis">Blepharitis</a></li> <li><a href="/wiki/Meibomian_gland_dysfunction" title="Meibomian gland dysfunction">Meibomian gland dysfunction</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Entropion" title="Entropion">Entropion</a></li> <li><a href="/wiki/Ectropion" title="Ectropion">Ectropion</a></li> <li><a href="/wiki/Lagophthalmos" title="Lagophthalmos">Lagophthalmos</a></li> <li><a href="/wiki/Blepharochalasis" title="Blepharochalasis">Blepharochalasis</a></li> <li><a href="/wiki/Ptosis_(eyelid)" title="Ptosis (eyelid)">Ptosis</a></li> <li><a href="/wiki/Blepharophimosis" title="Blepharophimosis">Blepharophimosis</a></li> <li><a href="/wiki/Xanthelasma" title="Xanthelasma">Xanthelasma</a></li> <li><a href="/wiki/Ankyloblepharon" title="Ankyloblepharon">Ankyloblepharon</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Eyelash" title="Eyelash">Eyelash</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Trichiasis" title="Trichiasis">Trichiasis</a></li> <li><a href="/wiki/Madarosis" title="Madarosis">Madarosis</a></li> <li><a href="/wiki/Distichiasis" class="mw-redirect" title="Distichiasis">Distichiasis</a></li> <li><a href="/wiki/Trichomegaly" title="Trichomegaly">Trichomegaly</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lacrimal_apparatus" title="Lacrimal apparatus">Lacrimal apparatus</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dacryoadenitis" title="Dacryoadenitis">Dacryoadenitis</a></li> <li><a href="/wiki/Epiphora_(medicine)" title="Epiphora (medicine)">Epiphora</a></li> <li><a href="/wiki/Dacryocystitis" title="Dacryocystitis">Dacryocystitis</a></li> <li><a href="/wiki/Xerophthalmia" title="Xerophthalmia">Xerophthalmia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Orbit_(anatomy)" title="Orbit (anatomy)">Orbit</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Exophthalmos" title="Exophthalmos">Exophthalmos</a></li> <li><a href="/wiki/Enophthalmos" title="Enophthalmos">Enophthalmos</a></li> <li><a href="/wiki/Orbital_cellulitis" title="Orbital cellulitis">Orbital cellulitis</a></li> <li><a href="/wiki/Orbital_lymphoma" title="Orbital lymphoma">Orbital lymphoma</a></li> <li><a href="/wiki/Periorbital_cellulitis" title="Periorbital cellulitis">Periorbital cellulitis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Conjunctiva" title="Conjunctiva">Conjunctiva</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chemosis" title="Chemosis">Chemosis</a></li> <li><a href="/wiki/Conjunctivitis" title="Conjunctivitis">Conjunctivitis</a> <ul><li><a href="/wiki/Allergic_conjunctivitis" title="Allergic conjunctivitis">allergic</a></li></ul></li> <li><a href="/wiki/Pterygium_(conjunctiva)" class="mw-redirect" title="Pterygium (conjunctiva)">Pterygium</a></li> <li><a href="/wiki/Pseudopterygium" title="Pseudopterygium">Pseudopterygium</a></li> <li><a href="/wiki/Pinguecula" title="Pinguecula">Pinguecula</a></li> <li><a href="/wiki/Subconjunctival_bleeding" title="Subconjunctival bleeding">Subconjunctival hemorrhage</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Globe" style="font-size:114%;margin:0 4em"><a href="/wiki/Globe_(human_eye)" title="Globe (human eye)">Globe</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Fibrous_tunic_of_eyeball" title="Fibrous tunic of eyeball">Fibrous tunic</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Sclera" title="Sclera">Sclera</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Scleritis" title="Scleritis">Scleritis</a></li> <li><a href="/wiki/Episcleritis" title="Episcleritis">Episcleritis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cornea" title="Cornea">Cornea</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Keratitis" title="Keratitis">Keratitis</a> <ul><li><a href="/wiki/Herpetic_keratitis" class="mw-redirect" title="Herpetic keratitis">herpetic</a></li> <li><a href="/wiki/Acanthamoeba_keratitis" title="Acanthamoeba keratitis">acanthamoebic</a></li> <li><a href="/wiki/Fungal_keratitis" title="Fungal keratitis">fungal</a></li> <li><a href="/wiki/Exposure_keratitis" class="mw-redirect" title="Exposure keratitis">Exposure</a></li> <li><a href="/wiki/Photokeratitis" title="Photokeratitis">Photokeratitis</a></li></ul></li> <li><a href="/wiki/Corneal_ulcer" title="Corneal ulcer">Corneal ulcer</a></li> <li><a href="/wiki/Thygeson%27s_superficial_punctate_keratopathy" title="Thygeson's superficial punctate keratopathy">Thygeson's superficial punctate keratopathy</a></li> <li><a href="/wiki/Corneal_dystrophy" title="Corneal dystrophy">Corneal dystrophy</a> <ul><li><a href="/wiki/Fuchs%27_dystrophy" title="Fuchs' dystrophy">Fuchs'</a></li> <li><a href="/wiki/Meesmann_corneal_dystrophy" title="Meesmann corneal dystrophy">Meesmann</a></li></ul></li> <li><a href="/wiki/Corneal_ectatic_disorders" title="Corneal ectatic disorders">Corneal ectasia</a> <ul><li><a href="/wiki/Keratoconus" title="Keratoconus">Keratoconus</a></li> <li><a href="/wiki/Pellucid_marginal_degeneration" title="Pellucid marginal degeneration">Pellucid marginal degeneration</a></li> <li><a href="/wiki/Keratoglobus" title="Keratoglobus">Keratoglobus</a></li> <li><a href="/wiki/Terrien%27s_marginal_degeneration" title="Terrien's marginal degeneration">Terrien's marginal degeneration</a></li> <li><a href="/wiki/Post-LASIK_ectasia" title="Post-LASIK ectasia">Post-LASIK ectasia</a></li></ul></li> <li><a href="/wiki/Keratoconjunctivitis" title="Keratoconjunctivitis">Keratoconjunctivitis</a> <ul><li><a href="/wiki/Keratoconjunctivitis_sicca" class="mw-redirect" title="Keratoconjunctivitis sicca">sicca</a></li></ul></li> <li><a href="/wiki/Corneal_opacity" title="Corneal opacity">Corneal opacity</a></li> <li><a href="/wiki/Corneal_neovascularization" title="Corneal neovascularization">Corneal neovascularization</a></li> <li><a href="/wiki/Kayser%E2%80%93Fleischer_ring" title="Kayser–Fleischer ring">Kayser–Fleischer ring</a></li> <li><a href="/wiki/Haab%27s_striae" title="Haab's striae">Haab's striae</a></li> <li><a href="/wiki/Arcus_senilis" title="Arcus senilis">Arcus senilis</a></li> <li><a href="/wiki/Band_keratopathy" title="Band keratopathy">Band keratopathy</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Uvea" title="Uvea">Vascular tunic</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><div class="hlist"><ul><li><a href="/wiki/Iris_(anatomy)" title="Iris (anatomy)">Iris</a></li><li><a href="/wiki/Ciliary_body" title="Ciliary body">Ciliary body</a></li></ul></div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Uveitis" title="Uveitis">Uveitis</a></li> <li><a href="/wiki/Intermediate_uveitis" title="Intermediate uveitis">Intermediate uveitis</a></li> <li><a href="/wiki/Hyphema" title="Hyphema">Hyphema</a></li> <li><a href="/wiki/Rubeosis_iridis" title="Rubeosis iridis">Rubeosis iridis</a></li> <li><a href="/wiki/Persistent_pupillary_membrane" title="Persistent pupillary membrane">Persistent pupillary membrane</a></li> <li><a href="/wiki/Iridodialysis" title="Iridodialysis">Iridodialysis</a></li> <li><a href="/wiki/Synechia_(eye)" title="Synechia (eye)">Synechia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Choroid" title="Choroid">Choroid</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Choroideremia" title="Choroideremia">Choroideremia</a></li> <li><a href="/wiki/Choroiditis" class="mw-redirect" title="Choroiditis">Choroiditis</a> <ul><li><a href="/wiki/Chorioretinitis" title="Chorioretinitis">Chorioretinitis</a></li></ul></li> <li><a href="/wiki/Focal_choroidal_excavation" title="Focal choroidal excavation">Focal choroidal excavation</a></li> <li><a href="/wiki/Polypoidal_choroidal_vasculopathy" title="Polypoidal choroidal vasculopathy">Polypoidal choroidal vasculopathy</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lens_(anatomy)" class="mw-redirect" title="Lens (anatomy)">Lens</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cataract" title="Cataract">Cataract</a> <ul><li><a href="/wiki/Congenital_cataract" title="Congenital cataract">Congenital cataract</a></li> <li><a href="/wiki/Childhood_cataract" title="Childhood cataract">Childhood cataract</a></li></ul></li> <li><a href="/wiki/Aphakia" title="Aphakia">Aphakia</a></li> <li><a href="/wiki/Ectopia_lentis" title="Ectopia lentis">Ectopia lentis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Retinal_disease" class="mw-redirect" title="Retinal disease">Retina</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Retinitis" title="Retinitis">Retinitis</a> <ul><li><a href="/wiki/Chorioretinitis" title="Chorioretinitis">Chorioretinitis</a></li> <li><a href="/wiki/Cytomegalovirus_retinitis" title="Cytomegalovirus retinitis">Cytomegalovirus retinitis</a></li></ul></li> <li><a href="/wiki/Retinal_detachment" title="Retinal detachment">Retinal detachment</a> <ul><li><a href="/wiki/Posterior_vitreous_detachment" title="Posterior vitreous detachment">Posterior vitreous detachment</a></li></ul></li> <li><a href="/wiki/Retinoschisis" title="Retinoschisis">Retinoschisis</a></li> <li><a href="/wiki/Ocular_ischemic_syndrome" title="Ocular ischemic syndrome">Ocular ischemic syndrome</a> / <a href="/wiki/Central_retinal_vein_occlusion" title="Central retinal vein occlusion">Central retinal vein occlusion</a></li> <li><a href="/wiki/Central_retinal_artery_occlusion" title="Central retinal artery occlusion">Central retinal artery occlusion</a></li> <li><a href="/wiki/Branch_retinal_artery_occlusion" title="Branch retinal artery occlusion">Branch retinal artery occlusion</a></li> <li><a href="/wiki/Retinopathy" title="Retinopathy">Retinopathy</a> <ul><li><a href="/wiki/Diabetic_retinopathy" title="Diabetic retinopathy">diabetic</a></li> <li><a href="/wiki/Hypertensive_retinopathy" title="Hypertensive retinopathy">hypertensive</a></li> <li><a href="/wiki/Purtscher%27s_retinopathy" title="Purtscher's retinopathy">Purtscher's</a></li> <li><a href="/wiki/Retinopathy_of_prematurity" title="Retinopathy of prematurity">of prematurity</a></li> <li><a href="/wiki/Bietti%27s_crystalline_dystrophy" title="Bietti's crystalline dystrophy">Bietti's crystalline dystrophy</a></li> <li><a href="/wiki/Coats%27_disease" title="Coats' disease">Coats' disease</a></li> <li><a href="/wiki/Sickle_cell_retinopathy" title="Sickle cell retinopathy">Sickle cell</a></li> <li><a href="/wiki/Photic_retinopathy" title="Photic retinopathy">photic</a></li></ul></li> <li><a href="/wiki/Macular_degeneration" title="Macular degeneration">Macular degeneration</a></li> <li><a href="/wiki/Retinitis_pigmentosa" title="Retinitis pigmentosa">Retinitis pigmentosa</a></li> <li><a href="/wiki/Retinal_haemorrhage" title="Retinal haemorrhage">Retinal haemorrhage</a></li> <li><a href="/wiki/Central_serous_retinopathy" class="mw-redirect" title="Central serous retinopathy">Central serous retinopathy</a></li> <li><a href="/wiki/Macular_edema" title="Macular edema">Macular edema</a></li> <li><a href="/wiki/Epiretinal_membrane" title="Epiretinal membrane">Epiretinal membrane</a> (Macular pucker)</li> <li><a href="/wiki/Vitelliform_macular_dystrophy" title="Vitelliform macular dystrophy">Vitelliform macular dystrophy</a></li> <li><a href="/wiki/Leber%27s_congenital_amaurosis" class="mw-redirect" title="Leber's congenital amaurosis">Leber's congenital amaurosis</a></li> <li><a href="/wiki/Birdshot_chorioretinopathy" title="Birdshot chorioretinopathy">Birdshot chorioretinopathy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Glaucoma" title="Glaucoma">Glaucoma</a> / <a href="/wiki/Ocular_hypertension" title="Ocular hypertension">Ocular hypertension</a> / <a href="/wiki/Primary_juvenile_glaucoma" class="mw-redirect" title="Primary juvenile glaucoma">Primary juvenile glaucoma</a></li> <li><a href="/wiki/Floater" title="Floater">Floater</a></li> <li><a href="/wiki/Leber%27s_hereditary_optic_neuropathy" title="Leber's hereditary optic neuropathy">Leber's hereditary optic neuropathy</a></li> <li><a href="/wiki/Ocular_hypotony" title="Ocular hypotony">Ocular hypotony</a></li> <li><a href="/wiki/Red_eye_(medicine)" title="Red eye (medicine)">Red eye</a></li> <li><a href="/wiki/Globe_rupture" title="Globe rupture">Globe rupture</a></li> <li><a href="/wiki/Fungal_keratitis" title="Fungal keratitis">Keratomycosis</a></li> <li><a href="/wiki/Phthisis_bulbi" title="Phthisis bulbi">Phthisis bulbi</a></li> <li><a href="/wiki/Persistent_fetal_vasculature" title="Persistent fetal vasculature">Persistent fetal vasculature</a></li> <li><a href="/wiki/Persistent_tunica_vasculosa_lentis" title="Persistent tunica vasculosa lentis">Persistent tunica vasculosa lentis</a></li> <li><a href="/wiki/Familial_exudative_vitreoretinopathy" title="Familial exudative vitreoretinopathy">Familial exudative vitreoretinopathy</a></li> <li><a href="/wiki/Vogt-Koyanagi-Harada_disease" class="mw-redirect" title="Vogt-Koyanagi-Harada disease">Vogt-Koyanagi-Harada disease</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Pathways" style="font-size:114%;margin:0 4em"><a href="/wiki/Visual_system" title="Visual system">Pathways</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Optic_nerve" title="Optic nerve">Optic nerve</a><br /><a href="/wiki/Optic_disc" title="Optic disc">Optic disc</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Optic_neuritis" title="Optic neuritis">Optic neuritis</a> <ul><li><a href="/wiki/Optic_papillitis" title="Optic papillitis">optic papillitis</a></li></ul></li> <li><a href="/wiki/Papilledema" title="Papilledema">Papilledema</a> <ul><li><a href="/wiki/Foster_Kennedy_syndrome" title="Foster Kennedy syndrome">Foster Kennedy syndrome</a></li></ul></li> <li><a href="/wiki/Optic_atrophy" class="mw-redirect" title="Optic atrophy">Optic atrophy</a></li> <li><a href="/wiki/Optic_disc_drusen" title="Optic disc drusen">Optic disc drusen</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a class="mw-selflink selflink">Optic neuropathy</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ischemic_optic_neuropathy" title="Ischemic optic neuropathy">Ischemic</a> <ul><li><a href="/wiki/Anterior_ischemic_optic_neuropathy" title="Anterior ischemic optic neuropathy">anterior (AION)</a></li> <li><a href="/wiki/Posterior_ischemic_optic_neuropathy" title="Posterior ischemic optic neuropathy">posterior (PION)</a></li> <li><a href="/wiki/Arteritic_anterior_ischemic_optic_neuropathy" title="Arteritic anterior ischemic optic neuropathy">arteritic anterior (AAION or arteritic AION)</a></li> <li><a href="/wiki/Non-arteritic_anterior_ischemic_optic_neuropathy" title="Non-arteritic anterior ischemic optic neuropathy">non-arteritic anterior (NAION)</a></li></ul></li> <li><a href="/wiki/Kjer%27s_optic_neuropathy" title="Kjer's optic neuropathy">Kjer's</a></li> <li><a href="/wiki/Leber%27s_hereditary_optic_neuropathy" title="Leber's hereditary optic neuropathy">Leber's hereditary</a></li> <li><a href="/wiki/Toxic_and_nutritional_optic_neuropathy" title="Toxic and nutritional optic neuropathy">Toxic and nutritional</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Strabismus" title="Strabismus">Strabismus</a><br /><a href="/wiki/Extraocular_muscles" title="Extraocular muscles">Extraocular muscles</a><br /><a href="/wiki/Binocular_vision" title="Binocular vision">Binocular vision</a><br /><a href="/wiki/Accommodation_(eye)" class="mw-redirect" title="Accommodation (eye)">Accommodation</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Paralytic_strabismus" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Strabismus#Paralytic_strabismus" title="Strabismus">Paralytic strabismus</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ophthalmoparesis" title="Ophthalmoparesis">Ophthalmoparesis</a></li> <li><a href="/wiki/Chronic_progressive_external_ophthalmoplegia" title="Chronic progressive external ophthalmoplegia">Chronic progressive external ophthalmoplegia</a></li> <li><a href="/wiki/Kearns%E2%80%93Sayre_syndrome" title="Kearns–Sayre syndrome">Kearns–Sayre syndrome</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cranial_nerve_disease" title="Cranial nerve disease">palsies</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Oculomotor_nerve_palsy" title="Oculomotor nerve palsy">Oculomotor (III)</a></li> <li><a href="/wiki/Fourth_nerve_palsy" title="Fourth nerve palsy">Fourth-nerve (IV)</a></li> <li><a href="/wiki/Sixth_nerve_palsy" title="Sixth nerve palsy">Sixth-nerve (VI)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Strabismus#Other_strabismus" title="Strabismus">Other strabismus</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Esotropia" title="Esotropia">Esotropia</a> / <a href="/wiki/Exotropia" title="Exotropia">Exotropia</a></li> <li><a href="/wiki/Hypertropia" title="Hypertropia">Hypertropia</a></li> <li><a href="/wiki/Heterophoria" title="Heterophoria">Heterophoria</a> <ul><li><a href="/wiki/Esophoria" title="Esophoria">Esophoria</a></li> <li><a href="/wiki/Exophoria" title="Exophoria">Exophoria</a></li></ul></li> <li><a href="/wiki/Cyclotropia" title="Cyclotropia">Cyclotropia</a></li> <li><a href="/wiki/Brown%27s_syndrome" title="Brown's syndrome">Brown's syndrome</a></li> <li><a href="/wiki/Duane_syndrome" title="Duane syndrome">Duane syndrome</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other binocular</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Conjugate_gaze_palsy" title="Conjugate gaze palsy">Conjugate gaze palsy</a></li> <li><a href="/wiki/Convergence_insufficiency" title="Convergence insufficiency">Convergence insufficiency</a></li> <li><a href="/wiki/Internuclear_ophthalmoplegia" title="Internuclear ophthalmoplegia">Internuclear ophthalmoplegia</a></li> <li><a href="/wiki/One_and_a_half_syndrome" title="One and a half syndrome">One and a half syndrome</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Refraction" title="Refraction">Refraction</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Refractive_error" title="Refractive error">Refractive error</a> <ul><li><a href="/wiki/Far-sightedness" class="mw-redirect" title="Far-sightedness">Hyperopia</a></li> <li><a href="/wiki/Near-sightedness" class="mw-redirect" title="Near-sightedness">Myopia</a></li></ul></li> <li><a href="/wiki/Astigmatism" title="Astigmatism">Astigmatism</a></li> <li><a href="/wiki/Anisometropia" title="Anisometropia">Anisometropia</a> / <a href="/wiki/Aniseikonia" title="Aniseikonia">Aniseikonia</a></li> <li><a href="/wiki/Presbyopia" title="Presbyopia">Presbyopia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Vision_disorder" title="Vision disorder">Vision disorders</a><br /><a href="/wiki/Blindness" class="mw-redirect" title="Blindness">Blindness</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amblyopia" title="Amblyopia">Amblyopia</a></li> <li><a href="/wiki/Leber%27s_congenital_amaurosis" class="mw-redirect" title="Leber's congenital amaurosis">Leber's congenital amaurosis</a></li> <li><a href="/wiki/Diplopia" title="Diplopia">Diplopia</a></li> <li><a href="/wiki/Scotoma" title="Scotoma">Scotoma</a></li> <li><a href="/wiki/Color_blindness" title="Color blindness">Color blindness</a> <ul><li><a href="/wiki/Achromatopsia" title="Achromatopsia">Achromatopsia</a></li> <li><a href="/wiki/Dichromacy" title="Dichromacy">Dichromacy</a></li> <li><a href="/wiki/Monochromacy" title="Monochromacy">Monochromacy</a></li></ul></li> <li><a href="/wiki/Nyctalopia" title="Nyctalopia">Nyctalopia</a> <ul><li><a href="/wiki/Oguchi_disease" title="Oguchi disease">Oguchi disease</a></li></ul></li> <li><a href="/wiki/Blindness" class="mw-redirect" title="Blindness">Blindness</a> / <a href="/wiki/Vision_loss" class="mw-redirect" title="Vision loss">Vision loss</a> / <a href="/wiki/Visual_impairment" title="Visual impairment">Visual impairment</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anopsia" title="Anopsia">Anopsia</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hemianopsia" title="Hemianopsia">Hemianopsia</a> <ul><li><a href="/wiki/Binasal_hemianopsia" title="Binasal hemianopsia">binasal</a></li> <li><a href="/wiki/Bitemporal_hemianopsia" title="Bitemporal hemianopsia">bitemporal</a></li> <li><a href="/wiki/Homonymous_hemianopsia" title="Homonymous hemianopsia">homonymous</a></li></ul></li> <li><a href="/wiki/Quadrantanopia" title="Quadrantanopia">Quadrantanopia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">subjective</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Asthenopia" class="mw-redirect" title="Asthenopia">Asthenopia</a></li> <li><a href="/wiki/Hemeralopia" title="Hemeralopia">Hemeralopia</a></li> <li><a href="/wiki/Photophobia" title="Photophobia">Photophobia</a></li> <li><a href="/wiki/Scintillating_scotoma" title="Scintillating scotoma">Scintillating scotoma</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Pupil" title="Pupil">Pupil</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anisocoria" title="Anisocoria">Anisocoria</a></li> <li><a href="/wiki/Argyll_Robertson_pupil" title="Argyll Robertson pupil">Argyll Robertson pupil</a></li> <li><a href="/wiki/Marcus_Gunn_pupil" class="mw-redirect" title="Marcus Gunn pupil">Marcus Gunn pupil</a></li> <li><a href="/wiki/Adie_syndrome" title="Adie syndrome">Adie syndrome</a></li> <li><a href="/wiki/Miosis" title="Miosis">Miosis</a></li> <li><a href="/wiki/Mydriasis" title="Mydriasis">Mydriasis</a></li> <li><a href="/wiki/Cycloplegia" title="Cycloplegia">Cycloplegia</a></li> <li><a href="/wiki/Parinaud%27s_syndrome" title="Parinaud's syndrome">Parinaud's syndrome</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nystagmus" title="Nystagmus">Nystagmus</a></li> <li><a href="/wiki/Childhood_blindness" title="Childhood blindness">Childhood blindness</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Infections" style="font-size:114%;margin:0 4em"><a href="/wiki/Eye_disease" title="Eye disease">Infections</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Trachoma" title="Trachoma">Trachoma</a></li> <li><a href="/wiki/Onchocerciasis" title="Onchocerciasis">Onchocerciasis</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a 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