An analysis of visual quality after Epi-LASIK / 医学研究生学报

ABSTRACT

Objective: Epi-LASIK appeared to be effective and safe in the treatment of high myopia,but some patients complain about visual symptoms postoperation.The purpose of this study was to evaluate the high order aberrations(HOAs) of the vision-decreased eyes treated by Epi-LASIK,and to analyze the causes of postoperative glare,scieropia and monocular diplopia.Methods: We evaluated 76 eyes of 49 patients treated by Epi-LASIK with a questionnaire three months after surgery,and from them selected 34 eyes of 27 patients who scored less than 80 points and complained of postoperative visual symptoms,including glare(25 eyes in 20 patients),scieropia(7 eyes in 5 patients)and monocular diplopia(2 eyes in 2 patients).Another 42 symptom-free eyes of 22 patients treated by Epi-LASIK were included in the control group.The root mean square(RMS) of total HOAs,coma and SA were determined with the iTrace Visual Function Analyzer from the central 6.0 mm zone,and the modulation transfer function(MTF) was simulated with the iTrace 3.1 software.Results: Significant differences were found in the RMS of total HOAs,coma and SA between the eyes with visual symptoms and those without,and the values of ablation zone decentration were significantly higher in the former than in the latter(P