Retina

 

This is the third and innermost coat of the eyeball with the choroid and sclera external to it. It extends completely behind the choroid and stops anteriorly at the ora serrata. At the point of the entry of the optic nerve it is provided with a thin layer called optic disc which can be visualized using an ophthalmoscope in a technique called fundosocopy. This point is also called blind spot because it has no receptors which mediate vision. But there is a point which is 3 mm from the blind spot called fovea which has the largest collection of receptors in the whole eye.

Blood supply is via the central artery of the retina. It is drained by the central vein of the retina.

Layers of the retina

Eye dissector

 

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Creator: Oluwole Ogunranti

                
Zones of retina                                
 

 

 

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