Excimer laser phototherapeutic keratectomy ptk is an important tool in the management of superficial corneal pathology it works well in the treatment of anterior corneal dystrophies and degenerations but we are learning that it may have a role in the treatment of certain patients with deeper corneal pathology indications also are being expanded to treat much less common conditions and also to treat children irregular astigmatism which is not treated very well with current ptk . Over the past decade there was a shift in treatment of these conditions from corneal transplantation to phototherapeutic keratectomy ptk using the 193 nm excimer laser for visual restoration we have reviewed the recent literature on techniques for performing and refining ptk and also on various pathologic conditions that can be treated with ptk the primary indications for ptk include anterior corneal dystrophies such as lattice granular and reis bucklers dystrophy ptk can produce . Excimer laser phototherapeutic keratectomy surgical strategies and clinical outcomes hersh ps1 burnstein y carr j etwaru g mayers m author information 1department of ophthalmology umdnj new jersey medical school newark 07103 usa. Certain conditions involving the front layers of the cornea can be treated with excimer laser ptk abnormal corneal lesions such as keratoconus nodules or salzmanns nodular degeneration generally respond well to ptk many inherited corneal opacities such as reis bucklers granular and lattice dystrophies along with some corneal scars also do well with ptk the advantage of using this laser to treat these corneal problems compared to a blade is that the laser has the ability to shave off
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