Corneal Aberrations Before and After Photorefractive Keratectomy (original) (raw)

2008, Journal of Optometry

PURPOSE: To determine whether -and which -higher-order corneal aberrations, up to the sixth order, are induced by photorefractive keratectomy (PRK). METHODS: 197 eyes of 197 patients have been examined with a corneal aberrometer for a 3.5 and a 6.0 mm pupil simulation, both before and 1, 3 , 6 months after myopic PRK treatment ranging from -15.25 D to -0.5 D (mean -5.31±2.95 D). The statistical evaluation was performed using a paired Student's T-test. RESULTS: After PRK there is a clear-cut increase in almost all the higher-order corneal aberrations for both a 3.5 and a 6.0 mm pupil simulation. These aberrations tend to normalize after 3 and 6 months mainly for a 3.5 mm simulation, whereas such normalization is not present for a 6.0 mm simulation. CONCLUSIONS: PRK induces significant aberrations both for 3.5 and 6 mm pupils, 1 month after PRK, but a trend towards normalization is evident at the 6 month follow-up for the smaller pupil size. (J Optom 2008;1:53-58 ©2008 Spanish Council of Optometry) KEY WORDS: photorefractive keratectomy; higher-order aberrations.

Sign up for access to the world's latest research.

checkGet notified about relevant papers

checkSave papers to use in your research

checkJoin the discussion with peers

checkTrack your impact