A cloudy cornea resulting from Fuch's corneal dystrophy before corneal transplantation .
Good vision requires a clear smooth cornea.
The cornea allows light into the eye and acts as a very powerful lens to focus light rays on the retina at the back of the eye. If the cornea is scarred , light rays are scattered by the cornea and cannot be focused on the retina. Typically, the central two-third's of the diseased cornea is removed and replaced with a corresponding portion of cornea from a human donor. The human donor cornea is obtained from the Eye Bank. The task of the Eye Bank is to contact families of potential donors, obtain the donor tissue after the donor dies, and protect the donor cornea prior to surgery.