Eye. Artwork of a healthy human eyeball. Light passes through the cornea (white arch,far left),the eye's main light-focusing structure. The iris (black,centre left) contracts or relaxes to allow the ideal amount of light through the pupil,the iris' central hole. The light is finely focused by the lens (not seen),before hitting the retina (also not seen) that lines the inside of the eyeball. Impulses from the retina's light- sensitive nerve cells travel along the optic nerve (orange,lower right) to the brain for processing. Part of two veins (blue,upper & lower centre) are seen on the outer surface of the eyeball | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gifford, David |
Taille de l’image : | 2853 px × 2124 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |