Eye Surgical Associates
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1505 Eastland Dr., Suite 2200, Bloomington, IL 61701, (309)662-7700
   
Corneal Transplant

A corneal transplant, also known as a corneal graft, keratoplasy or penetrating keratoplasty, involves the replacement of the central portion of a diseased or scarred cornea with a clear, healthy donor.
Corneal transplant surgery is the most successful of all tissue transplants. More than 40,000 corneal transplants are performed in the United States each year.
Corneal transplants are done to improve vision, relieve pain, and protect the inner structures of the eye. Corneal diseases like keratoconus can cause clouding, sdcarring and distortion. Replacing the damaged cornea with clear, healthy donor tissue can restore impaired vision.
In some cases (for example, an accident that damages the cornea) the surgery must be done immediately. However, the majority of corneal transplants are recommended because of a disease process. In these cases, there is time to gather information, ask questions and decide if this is the best option and if so, when to schedule the surgery.
The doctors at Eye Surgical Associates will help you evaluate your need for a corneal transplant and discuss the potential benefits of the surgery. The final decision is always yours. You must weigh the potential risks against the possible benefits in making this decision.

Diseased or injured cornea

Corneal "button" removed

Clear donor "button"

Donor cornea sutured into place

The cornea is the clear dome shaped "window" in the front of the eye. Behind this clear window lies the iris, or colored part of the eye. The cornea serves two purposes:

  • It forms the front part of the eye's outer wall and helps to shield the rest of the eye from germs, dust and other harmful matter.
  • It is a window allowing the entry of light into the eye. Because of its curvature the cornea functions as a lens focusing incoming light and images onto the retina at the back of the eye.

Although the cornea is clear and seems to lack substance, it is actually a highly organized group of cells and proteins. It measures approximately half an inch in diameter and is thinner than a penny. Unlike most tissue in the body, the cornea contains no blood vessels to nourish or protect it from infection.


Corneal transplant surgery generally takes about 1 1/2 hours. The entire procedure is done under a surgical microscope. A cylindrical, cookie-cutter type instrument called a trephine is used to remove a round, button-shaped portion of the diseased or damaged cornea. A "button" of similar size is cutr from the donor cornea and placed within the round opening. The donor tissue is then stiched in place with extremely fine nylon sutures.

   
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