[center][color=#ff0000][i][b]L'occhio[/b][/i][/color][/center][center][b][i][color=#0000ff]L'occhio è un globo racchiuso da una spessa membrana opaca, che presenta sul davanti una superficie[br]trasparente(cornea), dietro la quale vi è l'iride, un diaframma che ha al centro un foro detta pupilla[br]attraverso cui penetra la luce.[br][br]Dentro l'iride si trova il cristallino, un corpo trasparente a forma di lente, circondato dal muscolo[br][br]ciliare[br][br][br][/color][/i][/b][img]data:image/jpeg;base64,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[/img][b][i][color=#0000ff][br][/color][/i][/b][b][i][color=#0000ff][br][/color][/i][/b][/center][u][i][b][color=#674ea7]La pupilla è comandata involontariamente da un muscolo che ne regola il diametro (2 mm a 9 mm)[br][br]Nell'occhio si trovano 3 mezzi rifrangenti:[br][br]1) La cornea e l'umor acqueo, entrambi con indice di rifrazione n 1=1,346;[br][br]2) Il cristallino, con indice di rifrazione n 2=1,437;[br][br]3) L'umor vitreo, con indice di rifrazione n 1=1,346[br][/color][/b][/i][/u][center][br][br][br][img]https://i.imgur.com/oyQnhqI.jpg[/img][br][br][/center][br][color=#00ff00][i][b]Le immagini che si formano sulla rètina sono reali, capovolte e rimpicciolite[br][br][/b][/i][/color][b][i]L'occhio mette a fuoco gli oggetti modificando la curvatura del cristallino e,quindi, la sua distanza focale; tale processo prende il nome di accomodamento.[br][br]Quando l'occhio sano è a riposo si dice che è accomodato all'infinito (punto remoto)[br][br]L'occhio se viene sforzato riesce a vedere gli oggetti ad una distanza di 15 cm (punto prossimo); invece senza sforzo sensibile l'occhio può rimanere accomodato alla distanza di 25 cm.[/i][/b][br][center][color=#ff0000][i][b][br][br]Presbiopia,miopia e ipermetropia[br][br]La perdita del potere di accomodamento dell'occhio con il procedere dell'età si chiama[br]presbiopia[br]Nell'occhio miope l'immagine di un oggetto si forma prima della [u]rètina.[/u] In quello [u]ipermètrope[/u][br]si forma dietro di essa.[br][/b][/i][/color][br][img]https://www.occhiali24.it/hs-fs/hubfs/Blog%20Photos/IT%20Blog%20Photos/Miopia%20IT%20Logo%20part1.gif?width=600&name=Miopia%20IT%20Logo%20part1.gif[/img][color=#ff0000][i][b][br][/b][/i][/color][img]https://www.occhiali24.it/hs-fs/hubfs/Blog%20Photos/IT%20Blog%20Photos/Hyperopia%20IT%201200x1000%20part1.gif?width=600&name=Hyperopia%20IT%201200x1000%20part1.gif[/img][/center][center][br][img]https://medmedicine.it/sito/wp-content/uploads/2012/12/ipermetropia.png[/img][br][br][br][br][br][br][img]https://lh3.googleusercontent.com/proxy/OKd4e_mnL66Y1bpqtujujcCB56U4b139dii-MQvOWzU074pPaKQq--nn76qdkvGBjavAFASpsunsriDeYOsRVVyaCnvFGyV7fxk[/img][br][/center][br]