Abstract

The vertebrate eye can be described as a fluid-filled spherical structure designed to form and process images of the surrounding visual world. Anatomically, the eye consists essentially of three tissue layers: an outer fibrous layer made up of the sclera and cornea; an inner layer consisting largely of the retina, but including also parts of the ciliary body and iris; and an intermediate vascular layer made up of the choroid and portions of the ciliary body and iris (the uvea).