How do PRK, Lasik and Wavefront differ?
PRK requires longer protection, up to 48 hours, and is more uncomfortable for longer as the laser operates on the external corneal surface while Lasik ablates or cuts one of the inner layers giving more protection and less pain during recovery.
It is for this reason that PRK should only be considered for one eye at a time. High prescriptions are also less predictable with PRK and there is a greater risk of haloes aswell as prescription regression.
Wavefront : The cornea even in its natural state is subject to distortions. In corrective laser eye surgery instead of single sweeps across the eye the cornea is split into small individual squares with each in turn being lasered. The result is reduced post-operative aberrations and therefore a higher standard of vision.