It is the strongest focusing lens of the eye.
Normal vision depends upon the cornea staying clear, thin and smooth.
If the cornea should lose its clarity, become swollen or scarred, vision can be limited. In such a situation, medications may be used to try to limit the amount of visual loss. When medicine cannot clear the vision, a corneal transplant is considered. A corneal transplant is an operation in which the cornea is removed and replaced with a healthy donated human cornea. When an individual dies, his or her family can choose to donate selected organs for transplantation.