Common eye defects,artwork

Numéro d’image : 11601436
Common eye defects,artwork
Common eye defects. Computer artwork showing the structural difference between a normal eye (top) and ones with hyperopia (centre) and myopia (bottom). In the normal eye,light rays (yellow) converge and therefore focus on the retina exactly at the back of the eye. Myopia (shortsightedness) occurs where the eyeball is longer than it should be,meaning the light rays focus before they reach the retina. Hyperopia (longsightedness) is where the eyeball is shorter than it should be,meaning the light rays effectively focus behind the retina. Myopia causes distant objects to appear blurred,whereas hyperopia causes difficulty focusing on near objects
Licence : Droits gérés
Crédit: Science Photo Library / Elam, Gunilla
Taille de l’image : 3626 px × 4835 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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