Objective: To evaluate the long-term effectiveness and safety of photorefractive keratectomy (PRK) for patient with lower to moderate myopia.
Methods: 148 myopic eyes (-1.5 to -6.00 D) after PRK follow-up of more than 5 years were analyzed.
Results: Uncorrected visual acuity was >or= 1.0 in 136 eyes (91.9%), >or= 0.8 in 4 eyes (2.7%) and >or= 0.6 in 8 eyes (5.4%). The mean spherical equivalent change was from (-4.43 +/- 0.97) D to (-0.12 +/- 0.22) D, and the keratometric power (K value) was reduced from (43.81 +/- 1.10) D to (41.36 +/- 1.30) D in the 5 years of follow-up (P < 0.01).
Conclusion: The long-term effectiveness of PRK for myopia (-1.5 to -6.00 D) is satisfactory.