How the eye works

The eye is a spherical structure. It has a transparent front side which is the cornea. The wall of the eye beyond the cornea consists of three tissue layers. The outermost layer is the sclera, a tough protective coating that covers the outer surface of the eye. The middle layer is the choroid, which is a vascular layer that is continuous with the ciliary body and the iris on the anterior part of the eye. The inner layer is the retina, a light-sensitive tissue that lines the inside back wall of the eye. The eye is more complex than a camera, but the principle of how it functions is similar.



Click on Patient Education to search and open specific eye conditions.