This surgical procedure, also known as keratoplasty, replaces damaged cornea tissue with healthy tissue from a donor.

CNN: Fuchs' dystrophy

This is sometimes referred to as endothelial keratoplasty or posterior lamellar endothelial keratoplasty.

CNN: Fuchs' dystrophy

McDonald was also the third physician in the world to perform a procedure called conductive keratoplasty -- a noninvasive surgery for farsightedness that involves using radio-frequency energy to heat small spots around the cornea.

CNN: Her vision: Better, clearer sight