PRK (Photo Refractive Keratectomy) is a laser correction procedure whereby the clear layer of surface skin (the epithelium) is removed to access the corneal stroma (the bed) where laser reshaping can be performed. This is used in cases where the patient does not want a corneal flap, has a thinner cornea, or needs a special procedure because of past surgery/disease/trauma. The patient still gets all the benefit of topographic guided ablation, Contoura with LYRA Protocol, with the potential to create a supranormal, more uniform human cornea. This increases the potential for higher resolution vision, better than 20/20 vision, and minimization of halos and night glare.
The laser correction is still the same as with LASIK and the visual endpoint will also be the same over time, but the healing time is longer as the epithelium grows back over 3-5 days. During this time the patent may continue normal activities such as using a computer, watching TV, doing normal, light activities, going shopping, and even going to the movies. Doctors don’t recommend driving during that time and advise avoiding any activity that could get dirt, sweat, or contaminants in the eye. After about a week there is no physical limitation for the patient.
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