A common degenerative change in which the outer edge of the cornea gradually becomes opaque, generally in both eyes; usually affects people over the age of 50.

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The International Joint Commission on Allied Health Personnel in Ophthalmology (IJCAHPO) is an American nonprofit professional association for Allied Ophthalmic Personnel (AOP).


1. A common degenerative change in which the outer edge of the cornea gradually becomes opaque, generally in both eyes; usually affects people over the age of 50.