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Eye Health Glossary

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Kayser-Fleischer Ring

Ring of copper deposition along the limbus (border between the cornea and the sclera. The appearance of a Kayser-Fleischer ring is a sign of Wilson disease.

keratectomy

Surgical removal of corneal tissue. PRK is an example of a keratectomy.

keratitis

Inflammation of the cornea.

keratoconus

Eye disorder in which the cornea becomes progressively more conical in shape (as opposed to the spherical normal cornea), resulting in severe astigmatism and blurred, distorted vision. Learn more about Keratoconus.

keratometer

Ophthalmic instrument that is used to determine the curvature of the cornea. It is an essential tool for optometrists in determining the proper contact lens fit.

keratoplasty

Surgical removal of the scarred or diseased cornea, to be replaced with healthy donor tissue.

keratotomy

Surgical incision into the cornea. Radial keratotomy (RK) is an outdated refractive surgery in which vision was corrected by making radial slices into the cornea.

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