A progressive thinning of the cornea that causes blurred vision and astigmatism. It's the most common corneal dystrophy in the U.S., affecting 1 in 2,000 Americans, often starting in the teens or 20s.

A condition where cells in the cornea's inner layer gradually deteriorate, causing the cornea to swell and distort vision. Over time, this can lead to painful blisters and severe visual impairment.

Named for the accumulation of abnormal protein fibers (amyloid deposits) in the cornea, which create cloudy, converging lines that reduce vision. Over time, this can lead to scarring, corneal erosion, and significant pain, sometimes requiring a transplant.

A rare condition where endothelial cells move off the cornea onto the iris, causing corneal swelling, distortion of the iris and pupil, and often glaucoma. The cause is unknown, but glaucoma can be managed with medication and corneal swelling treated with a transplant.

Visit the Eye Bank Association of America to learn more about the most common corneal diseases that may create a need for transplantation.