Corrected long-sightedness, illustration

Numéro d’image : 13377644
Corrected long-sightedness, illustration
Correction of long-sightedness, illustration. Cross-section diagram of an eye with the vision defect of long-sightedness, corrected with a convex lens. In long-sightedness, or hyperopia, the eyeball is shorter than it should be, or the eye's lens (grey) is the wrong shape, and light is focussed behind the retina. This causes difficulty focussing on a near object (O, left), which appears blurred. It can be corrected by placing a convex lens (blue) in front of the eye, which refracts light from the object so that it focusses on the retina, creating a sharp image (right).
Licence : Droits gérés
Crédit: Science Photo Library
Taille de l’image : 4181 px × 4181 px
Model Release : Non requis
Property Release : Non requis
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