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Retinal pigment epithelium: This layer lying betwen the retina and choroid, contains melanocytes that make for its characteristic black color. This pigment allows the inside of the eye to absorb stray rays of light like the black paint inside a camera or within a dark room.he eyes are housed in protective bony structures of the skull called the orbits. Each eye is composed of a tough outer layer, the sclera and cornea; a middle layer, the choroid, ciliary body and iris; and the inner layer of nerve tissue called the retina.
Cornea. The cornea and sclera form the outer fibrous layer of the eye. The cornea is a clear transparent tissue, which is located forward of the eyeball. Light rays pass through this limpid tissue, and on through the crystalline lens to reach the retina.The cornea is convex in shape and for this reason directs or bends light rays so that they can be focused on the retina.clera. The eye consists of three layers of tissue which make up the wall of the eye. The sclera is the outermost layer of tissue, also called the white of the eye. This layer is a very stable fibrous membrane that continues to retain the shape of the eye and provides protection.