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[Excimer laser photorefractive keratectomy for lower to moderate myopia: 5 year follow-up]
1Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730.
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.