his exam shows that alfred rivet is a good candidate for surgery. the lands in cornea are clouded so 2 layers of the eye are clouded in one surgical procedure will try to eliminate both sources of his clouded vision will replace the lens and transplant the inner layer of the cornea them to. the transparent cornea is part of the outer casing of the i and serves as a kind of wind shield. behind it the iris opens and closes to control the amount of light entering leon i. the lens focus is the incoming light to create a sharp in each on the retina. the optic nerve then transmits that information to the brain. 2 hours later the surgery is underway flounce course even is preparing the corneal transplant the clinic has its own eye back with corneas from organ donations the cornea does not have a direct blood supply for that reason it can be removed up to 72 hours after death . of. couse close even carefully removes the agents of the cornea. the blue contrast agent helps him guide the delicate incisions. the cornea is only a few 1000 of a millimeter thick.