Keratoplasty
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Aim: Replacing the opaque part by a clear cadaveric cornea
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Types:Z
- Lamellar (Superficial)
- Deep (Penetrating)
NB: Both of them may be partial or total
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Indications:Z
- Optical
- a) Central corneal opacities
- b) Keratoconus
- Therapeutic
- a) Resistant corneal ulcer
- b) Corneal fistula
- Optical
Bladeless blade
PKP
1- age >18
2- stable refraction for 2 yrs
3- no other diseases of eye - normal opthalmic exam
4- no keratisconus normal bectacam??CC
5- corneal thickness 400-450 minimum
PRK:(corneal epithelium removal; by alcohol specific concentration, special spatula, after removal of epithelium wash the stroma by salime and then apply laser; Exciemer laser = ablation i.e. reshaping of corneal stromaZOSPE fit for sport
footballer boxer
disadvantage pain
LASIK corrects by high degree