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This is becoming performed less and less often with the advance of new techniques and technology.
This procedure involves removal of the whole cornea (all 5 layers) and replacement with a full thickness cornea from a donor. The cornea is stitched into place using stitches of 20 microns (40% the thickness of Human Hair!).
Penetrating or full
thickness graft performed in
1999 for Keratoconus
Advantages
Disadvantages