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Accomodazione - Wikipedia

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user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&amp;utm_medium=sidebar&amp;utm_campaign=C13_it.wikipedia.org&amp;uselang=it" class=""><span>Fai una donazione</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciale:CreaUtenza&amp;returnto=Accomodazione" title="Si consiglia di registrarsi e di effettuare l&#039;accesso, anche se non è obbligatorio" class=""><span>registrati</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciale:Entra&amp;returnto=Accomodazione" title="Si consiglia di effettuare l&#039;accesso, anche se non è obbligatorio [o]" accesskey="o" class=""><span>entra</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" 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class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Storia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Storia"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Storia</span> </div> </a> <ul id="toc-Storia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Anatomia_funzionale" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Anatomia_funzionale"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Anatomia funzionale</span> </div> </a> <ul id="toc-Anatomia_funzionale-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Variazioni_fisiologiche_nel_processo_accomodativo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Variazioni_fisiologiche_nel_processo_accomodativo"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Variazioni fisiologiche nel processo accomodativo</span> </div> </a> <ul id="toc-Variazioni_fisiologiche_nel_processo_accomodativo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Stimoli" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Stimoli"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Stimoli</span> </div> </a> <ul id="toc-Stimoli-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-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="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l&#039;indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l&#039;indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Accomodazione</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un&#039;altra lingua. Disponibile in 39 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-39" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">39 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Akkommodasie_(oog)" title="Akkommodasie (oog) - afrikaans" lang="af" hreflang="af" data-title="Akkommodasie (oog)" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D9%83%D9%8A%D9%81_(%D8%B9%D9%8A%D9%86)" title="تكيف (عين) - arabo" lang="ar" hreflang="ar" data-title="تكيف (عين)" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Akkomodasiya_(biologiya)" title="Akkomodasiya (biologiya) - azerbaigiano" lang="az" hreflang="az" data-title="Akkomodasiya (biologiya)" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaigiano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%90%D0%BA%D0%BE%D0%BC%D0%BE%D0%B4%D0%B0%D1%86%D0%B8%D1%8F" title="Акомодация - bulgaro" lang="bg" hreflang="bg" data-title="Акомодация" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Akomodacija_(oko)" title="Akomodacija (oko) - bosniaco" lang="bs" hreflang="bs" data-title="Akomodacija (oko)" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Acomodaci%C3%B3_(ull)" title="Acomodació (ull) - catalano" lang="ca" hreflang="ca" data-title="Acomodació (ull)" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Akomodace" title="Akomodace - ceco" lang="cs" hreflang="cs" data-title="Akomodace" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Akkommodation_(%C3%B8je)" title="Akkommodation (øje) - danese" lang="da" hreflang="da" data-title="Akkommodation (øje)" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Akkommodation_(Auge)" title="Akkommodation (Auge) - tedesco" lang="de" hreflang="de" data-title="Akkommodation (Auge)" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Accommodation_(vertebrate_eye)" title="Accommodation (vertebrate eye) - inglese" lang="en" hreflang="en" data-title="Accommodation (vertebrate eye)" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Acomodaci%C3%B3n_(ojo)" title="Acomodación (ojo) - spagnolo" lang="es" hreflang="es" data-title="Acomodación (ojo)" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Akommodatsioon" title="Akommodatsioon - estone" lang="et" hreflang="et" data-title="Akommodatsioon" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D8%B7%D8%A7%D8%A8%D9%82_(%DA%86%D8%B4%D9%85)" title="تطابق (چشم) - persiano" lang="fa" hreflang="fa" data-title="تطابق (چشم)" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Akkommodaatio_(silm%C3%A4)" title="Akkommodaatio (silmä) - finlandese" lang="fi" hreflang="fi" data-title="Akkommodaatio (silmä)" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Accommodation" title="Accommodation - francese" lang="fr" hreflang="fr" data-title="Accommodation" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Akomodacija" title="Akomodacija - croato" lang="hr" hreflang="hr" data-title="Akomodacija" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B1%D5%AF%D5%B8%D5%B4%D5%B8%D5%A4%D5%A1%D6%81%D5%AB%D5%A1" title="Ակոմոդացիա - armeno" lang="hy" hreflang="hy" data-title="Ակոմոդացիա" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Akomodasi_optik" title="Akomodasi optik - indonesiano" lang="id" hreflang="id" data-title="Akomodasi optik" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%90%D0%BA%D0%BA%D0%BE%D0%BC%D0%BE%D0%B4%D0%B0%D1%86%D0%B8%D1%8F_(%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Аккомодация (биология) - kazako" lang="kk" hreflang="kk" data-title="Аккомодация (биология)" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A1%B0%EC%A0%88_(%EC%B2%99%EC%B6%94%EB%8F%99%EB%AC%BC_%EB%88%88)" title="조절 (척추동물 눈) - coreano" lang="ko" hreflang="ko" data-title="조절 (척추동물 눈)" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Akomodacija" title="Akomodacija - lituano" lang="lt" hreflang="lt" data-title="Akomodacija" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Akomod%C4%81cija" title="Akomodācija - lettone" lang="lv" hreflang="lv" data-title="Akomodācija" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%85%E0%B4%95%E0%B5%8D%E0%B4%95%E0%B5%8A%E0%B4%AE%E0%B4%A1%E0%B5%87%E0%B4%B7%E0%B5%BB_(%E0%B4%95%E0%B4%A3%E0%B5%8D%E0%B4%A3%E0%B5%8D)" title="അക്കൊമഡേഷൻ (കണ്ണ്) - malayalam" lang="ml" hreflang="ml" data-title="അക്കൊമഡേഷൻ (കണ്ണ്)" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Accommodatie_(oog)" title="Accommodatie (oog) - olandese" lang="nl" hreflang="nl" data-title="Accommodatie (oog)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Akkommodasjon_(%C3%B8yet)" title="Akkommodasjon (øyet) - norvegese bokmål" lang="nb" hreflang="nb" data-title="Akkommodasjon (øyet)" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Akomodacja_oka" title="Akomodacja oka - polacco" lang="pl" hreflang="pl" data-title="Akomodacja oka" data-language-autonym="Polski" data-language-local-name="polacco" 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/Acomoda%C3%A7%C3%A3o_(oftalmologia)" title="Acomodação (oftalmologia) - portoghese" lang="pt" hreflang="pt" data-title="Acomodação (oftalmologia)" data-language-autonym="Português" data-language-local-name="portoghese" 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%90%D0%BA%D0%BA%D0%BE%D0%BC%D0%BE%D0%B4%D0%B0%D1%86%D0%B8%D1%8F_(%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Аккомодация (биология) - russo" lang="ru" hreflang="ru" data-title="Аккомодация (биология)" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Akomodacija_oka" title="Akomodacija oka - serbo-croato" lang="sh" hreflang="sh" data-title="Akomodacija oka" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Accommodation_(eye)" title="Accommodation (eye) - Simple English" lang="en-simple" hreflang="en-simple" data-title="Accommodation (eye)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%90%D0%BA%D0%BE%D0%BC%D0%BE%D0%B4%D0%B0%D1%86%D0%B8%D1%98%D0%B0_%D0%BE%D0%BA%D0%B0" title="Акомодација ока - serbo" lang="sr" hreflang="sr" data-title="Акомодација ока" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Ackommodation" title="Ackommodation - svedese" lang="sv" hreflang="sv" data-title="Ackommodation" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%95%E0%AE%A3%E0%AF%8D%E0%AE%A3%E0%AE%BF%E0%AE%A9%E0%AF%8D%E0%AE%B1%E0%AE%A9%E0%AF%8D%E0%AE%A9%E0%AE%AE%E0%AF%88%E0%AE%B5%E0%AF%81" title="கண்ணின்றன்னமைவு - tamil" lang="ta" hreflang="ta" data-title="கண்ணின்றன்னமைவு" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%9B%E0%B8%A3%E0%B8%B1%E0%B8%9A%E0%B8%95%E0%B8%B2%E0%B8%94%E0%B8%B9%E0%B9%83%E0%B8%81%E0%B8%A5%E0%B9%89%E0%B9%84%E0%B8%81%E0%B8%A5" title="การปรับตาดูใกล้ไกล - thailandese" lang="th" hreflang="th" data-title="การปรับตาดูใกล้ไกล" data-language-autonym="ไทย" data-language-local-name="thailandese" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Akomodasyon" title="Akomodasyon - tagalog" lang="tl" hreflang="tl" data-title="Akomodasyon" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%90%D0%BA%D0%BA%D0%BE%D0%BC%D0%BE%D0%B4%D0%B0%D1%86%D0%B8%D1%8F_(%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Аккомодация (биология) - tataro" lang="tt" hreflang="tt" data-title="Аккомодация (биология)" data-language-autonym="Татарча / tatarça" data-language-local-name="tataro" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%90%D0%BA%D0%BE%D0%BC%D0%BE%D0%B4%D0%B0%D1%86%D1%96%D1%8F_%D0%BE%D0%BA%D0%B0" title="Акомодація ока - ucraino" lang="uk" hreflang="uk" data-title="Акомодація ока" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Akkomodatsiya" title="Akkomodatsiya - uzbeco" lang="uz" hreflang="uz" data-title="Akkomodatsiya" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-zh 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class="vector-menu-heading"> Generale </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciale:PuntanoQui/Accomodazione" title="Elenco di tutte le pagine che sono collegate a questa [j]" accesskey="j"><span>Puntano qui</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciale:ModificheCorrelate/Accomodazione" rel="nofollow" title="Elenco delle ultime modifiche alle pagine collegate a questa [k]" accesskey="k"><span>Modifiche correlate</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Speciale:PagineSpeciali" title="Elenco di tutte le pagine speciali [q]" accesskey="q"><span>Pagine speciali</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Accomodazione&amp;oldid=139416706" title="Collegamento permanente a questa versione di questa pagina"><span>Link permanente</span></a></li><li id="t-info" 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href="https://commons.wikimedia.org/wiki/Category:Accommodation_(eye)" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q419793" title="Collegamento all&#039;elemento connesso dell&#039;archivio dati [g]" accesskey="g"><span>Elemento Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspetto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">nascondi</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l&#039;enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Reindirizzamento da <strong><a href="/w/index.php?title=Accomodamento&amp;redirect=no" class="mw-redirect" title="Accomodamento">Accomodamento</a></strong>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Focus_in_an_eye.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Focus_in_an_eye.svg/220px-Focus_in_an_eye.svg.png" decoding="async" width="220" height="74" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Focus_in_an_eye.svg/330px-Focus_in_an_eye.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/81/Focus_in_an_eye.svg/440px-Focus_in_an_eye.svg.png 2x" data-file-width="800" data-file-height="270" /></a><figcaption>Schematizzazione del cambiamento strutturale del <a href="/wiki/Cristallino" title="Cristallino">cristallino</a> durante il processo dell'accomodazione</figcaption></figure> <p>L'<b>accomodazione</b> (o <b>processo accomodativo</b>), in <a href="/wiki/Oftalmologia" title="Oftalmologia">oftalmologia</a>, è il meccanismo autonomo dell'<a href="/wiki/Occhio" title="Occhio">apparato visivo</a>, attuato attraverso l'aumento della curvatura della superficie anteriore del <a href="/wiki/Cristallino" title="Cristallino">cristallino</a> tramite il <a href="/wiki/Muscolo_ciliare" title="Muscolo ciliare">muscolo ciliare</a>, che permette di creare sulla <a href="/wiki/Retina" title="Retina">retina</a> immagini a fuoco di oggetti posti a distanza inferiore rispetto al <a href="/wiki/Punto_remoto" title="Punto remoto">punto remoto</a> o infinito nella visione <a href="/wiki/Emmetropia" title="Emmetropia">emmetrope</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Storia">Storia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=1" title="Modifica la sezione Storia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Storia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La dimostrazione scientifica del processo accomodativo, e della capacità di aumentare il potere <a href="/wiki/Diottria" title="Diottria">diottrico</a> di una struttura interna quale il cristallino nel processo visivo, fu attuata da <a href="/wiki/Thomas_Young" title="Thomas Young">Thomas Young</a>, <a href="/wiki/Oftalmologia" title="Oftalmologia">oftalmologo</a> <a href="/wiki/Gran_Bretagna" title="Gran Bretagna">britannico</a>, nel <a href="/wiki/1801" title="1801">1801</a>. L'esperimento, noto come <i>esperimento di Young</i>, consisté nell'applicazione di una <a href="/wiki/Pinza" title="Pinza">pinza</a> a livello anteriore e posteriore del <a href="/wiki/Bulbo" title="Bulbo">bulbo</a> oculare dello stesso scienziato, per valutare la presenza di <a href="/wiki/Fosfene" title="Fosfene">fosfeni</a> in caso di allungamento assiale e conseguente sollecitazione retinica. L'assenza di tale fenomeno percettivo dimostrò che la capacità accomodativa non è legata ad un allungamento o accorciamento oculare ma ad un meccanismo interno di adattamento ottico. </p><p><a href="/wiki/Hermann_von_Helmholtz" title="Hermann von Helmholtz">Hermann von Helmholtz</a>, <a href="/wiki/Medico" title="Medico">medico</a>, <a href="/wiki/Fisiologia" title="Fisiologia">fisiologo</a> e <a href="/wiki/Fisico" title="Fisico">fisico</a> <a href="/wiki/Germania" title="Germania">tedesco</a>, nel <a href="/wiki/1837" title="1837">1837</a> dimostrò grazie all'utilizzo dell'<a href="/wiki/Oftalmoscopio" title="Oftalmoscopio">oftalmoscopio</a> da lui progettato, la variazione effettiva di curvatura della superficie anteriore del cristallino. </p> <div class="mw-heading mw-heading2"><h2 id="Anatomia_funzionale">Anatomia funzionale</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=2" title="Modifica la sezione Anatomia funzionale" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: Anatomia funzionale"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il <a href="/wiki/Muscolo_ciliare" title="Muscolo ciliare">muscolo ciliare</a>, <a href="/wiki/Tessuto_muscolare_liscio" title="Tessuto muscolare liscio">liscio</a>, consente il fenomeno dell'accomodazione modificando la forma del <a href="/wiki/Cristallino" title="Cristallino">cristallino</a> grazie al fatto che quest'ultimo prende inserzione proprio sul <a href="/wiki/Corpo_ciliare" title="Corpo ciliare">corpo ciliare</a> attraverso il legamento sospensore di Zinn (o zonula ciliare). La contrazione del muscolo ciliare produce lo stesso effetto che avrebbe uno <a href="/wiki/Sfintere" title="Sfintere">sfintere</a>, avvicinando al centro i processi ciliari e riducendo di conseguenza la trazione sulla porzione equatoriale del <a href="/wiki/Cristallino" title="Cristallino">cristallino</a>: le fibre zonulari si rilassano e il <a href="/wiki/Cristallino" title="Cristallino">cristallino</a> è libero di aumentare la sua <a href="/w/index.php?title=Lente_convessa&amp;action=edit&amp;redlink=1" class="new" title="Lente convessa (la pagina non esiste)">convessità</a> (e pertanto il suo potere di <a href="/wiki/Rifrazione" title="Rifrazione">rifrazione</a>). </p> <div class="mw-heading mw-heading2"><h2 id="Variazioni_fisiologiche_nel_processo_accomodativo">Variazioni fisiologiche nel processo accomodativo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=3" title="Modifica la sezione Variazioni fisiologiche nel processo accomodativo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Variazioni fisiologiche nel processo accomodativo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Secondo gli studi di <a href="/wiki/Allvar_Gullstrand" title="Allvar Gullstrand">Allvar Gullstrand</a>, che per questo ottenne il <a href="/wiki/Premio_Nobel_per_la_medicina" title="Premio Nobel per la medicina">Premio Nobel per la medicina</a> nel <a href="/wiki/1911" title="1911">1911</a><sup><a rel="nofollow" class="external text" href="https://www.nobelprize.org/nobel_prizes/medicine/laureates/1911/index.html">The Nobel Prize in Physiology or Medicine 1911</a></sup>, ruolo fondamentale nella capacità di convergenza del cristallino risiede nella caratteristica del nucleo centrale di modificare la propria forma da <a href="/wiki/Ellisse" title="Ellisse">ellittica</a> a <a href="/wiki/Sfera" title="Sfera">sferica</a>, aumentando notevolmente il proprio potere diottrico. In un occhio miope tale punto remoto è vicino, ad una distanza reale, per cui si fa un ridotto uso dell'accomodazione; al contrario in un occhio ipermetrope il punto remoto si trova ad una distanza virtuale oltre l'infinito, per cui (se non si portano le lenti correttive), il meccanismo di accomodazione tende ad essere perennemente in funzione. Si riscontrano differenti fenomeni di variazione fisiologica associati, nel processo di accomodazione: </p> <ul><li>aumento sensibile della curvatura di superficie della parte anteriore del cristallino, minima in quella posteriore</li> <li>avvicinamento della superficie anteriore del cristallino alla <a href="/wiki/Cornea" title="Cornea">cornea</a>, con conseguente diminuzione del volume della <a href="/wiki/Camera_anteriore_dell%27occhio" title="Camera anteriore dell&#39;occhio">camera anteriore</a></li> <li>aumento dello spessore del cristallino e conseguente riduzione del diametro</li> <li>aumento della tensione dei <a href="/wiki/Muscolo_ciliare" title="Muscolo ciliare">muscoli ciliari</a></li> <li>spostamento inferiore del cristallino, legato probabilmente alla <a href="/wiki/Forza_di_gravit%C3%A0" class="mw-redirect" title="Forza di gravità">forza di gravità</a></li> <li>aumento del <a href="/wiki/Diottria" title="Diottria">potere diottrico</a> refrattivo</li> <li>generazione del processo di <a href="/wiki/Miosi" title="Miosi">miosi</a>, con riduzione del foro <a href="/wiki/Pupilla" title="Pupilla">pupillare</a>, definito <a href="/wiki/Sincinesia" title="Sincinesia">riflesso sincinetico</a>, poiché non stimolato direttamente dall'accomodazione ma associato ad esso.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Stimoli">Stimoli</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=4" title="Modifica la sezione Stimoli" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Stimoli"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Per <b>stimolare</b> l'accomodazione devono essere presenti almeno uno di questi tre fattori: </p> <ul><li>Sfuocamento dell'immagine a livello retinico</li> <li><a href="/wiki/Aberrazione_cromatica" title="Aberrazione cromatica">Aberrazione cromatica</a> dell'occhio</li> <li><a href="/wiki/Coscienza" title="Coscienza">Coscienza</a> dell'avvicinamento dell'oggetto esaminato e relativo aumento della grandezza</li></ul> <p>La velocità di reazione a questi stimoli è stata calcolata da <i>Campbell</i> e <i>Westheimer</i> in 0,36 secondi, mentre l'intero processo di messa a fuoco richiederebbe 1 secondo, per gli studi di <i>Tucker</i> e <i>Charman</i>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=5" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=5" title="Edit section&#039;s source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text">Manuale di optometria e contattologia, A. Rossetti, ed. Zanichelli</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=6" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=6" title="Edit section&#039;s source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>A. Rossetti, <i>Manuale di optometria e contattologia</i>, ed. Zanichelli</li> <li>M. Nocera, <i>Guida all'adattamento degli ausili visivi ingrandenti in ipovisione</i>, ed. Intervision</li> <li>G. Moro, L. Giannelli, <i>Utilizzo tradizionale ed approfondito della lampada a fessura</i>, ed. Intervision</li> <li>Giannelli L. Giannelli M. Moro G. "L'esame visivo Efficace" Medical Books Ed. 2012</li> <li>Giuseppe Anastasi, et al., Trattato di anatomia umana sistematica e funzionale, vol.3, 5ª ed., Milano, Edi.Ermes, 2019, p. 364, 377, <a href="/wiki/Speciale:RicercaISBN/978-88-7051-705-7" title="Speciale:RicercaISBN/978-88-7051-705-7">ISBN&#160;978-88-7051-705-7</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=7" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=7" title="Edit section&#039;s source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Accommodation (eye)"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Accommodation_(eye)?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Accommodation_(eye)?uselang=it">accomodazione</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Accomodazione&amp;veaction=edit&amp;section=8" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Accomodazione&amp;action=edit&amp;section=8" title="Edit section&#039;s source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/topic/accommodation-stimulus-response-behaviour"><span style="font-style:italic;">accommodation</span></a> / <a rel="nofollow" class="external text" href="https://www.britannica.com/science/accommodation-ocular"><span style="font-style:italic;">accommodation (altra versione)</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q419793#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li></ul> <style data-mw-deduplicate="TemplateStyles:r140554510">.mw-parser-output .CdA{border:1px solid #aaa;width:100%;margin:auto;font-size:90%;padding:2px}.mw-parser-output .CdA th{background-color:#f2f2f2;font-weight:bold;width:20%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .CdA th{background-color:#202122}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-os .mw-parser-output .CdA th{background-color:#202122}}</style><table class="CdA"><tbody><tr><th><a href="/wiki/Aiuto:Controllo_di_autorit%C3%A0" title="Aiuto:Controllo di autorità">Controllo di autorità</a></th><td><a href="/wiki/Nuovo_soggettario" title="Nuovo soggettario">Thesaurus BNCF</a> <span class="uid"><a rel="nofollow" class="external text" href="https://thes.bncf.firenze.sbn.it/termine.php?id=51285">51285</a></span><span style="font-weight:bold;">&#160;·</span> <a href="/wiki/Library_of_Congress_Control_Number" title="Library of Congress Control Number">LCCN</a> <span class="uid">(<span style="font-weight:bolder; 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