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Who is a good candidate for photorefractive keratectomy?
The ideal candidate is someone whose corneal tissue is well suited for the procedure. Several criteria must be met first. For example, corneal thickness is important. Larger corrections require more tissue ablation. The surgeon will calculate if there will be sufficient residual corneal tissue for the ablation to be performed safely.
Ideally the eyes should also be free of underlying diseases or conditions that might affect the cornea's stability, clarity, or ability to heal well. The eye doctor reviews the medical history and performs a complete eye examination to look for any such condition which might affect the outcome.
Age is another factor. If a candidate's eyes are still growing (for example, in childhood and in the teen years ) the refractive error may not have stabilized. Undergoing photorefractive keratectomy too soon may result in an undercorrection.