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Corneal transplants are commonly used for treating two types of corneal problems. The first is kerotoconus, a disease that causes progressive thinning of the cornea. The second is excessive scarring caused by chemical burns, blunt trauma or other severe lacerations to the cornea. During the surgery,

Color vision deficiency is a term that is used to describe one of a number of hereditary or acquired color vision problems. The inherited form is the most common deficiency. It affects both eyes and does not worsen over time. This type of color vision deficiency occurs more in males than in females.

Astigmatism often refers to a cornea that is oval in shape, rather than round shaped. The oval shape of the cornea causes light to focus on more than one point in the eye, resulting in blurred vision. Astigmatism typically occurs along with nearsightedness and farsightedness. Astigmatism can easily be