Abstract
Objective To observe and compare the relationship between subjective visual perception and objective examination results of visual quality after LASEK,LASIK and femtosecond laser LASIK (FS-LASIK).Methods This retrospective study included 320 eyes of 160 patients in a 1-year follow-up after refractive surgery.Eighty eyes of 40 patients underwent LASEK,120 eyes of 60 patients underwent LASIK,and 120 eyes of 60 patients underwent FS-LASIK.The average preoperative spherical equivalent (SE) of the LASEK group was-4.35±1.07 D,of the LASIK group was-5.05±1.13 D,of the FS-LASIK group was-5.11±1.25 D.Uncorrected visual acuity (UCVA),best corrected visual acuity (BCVA),spherical and cylindrical values,and SE were recorded before and 1 year after surgery; meanwhile,a general evaluation and a comparison of pre-and postoperative visual quality and symptoms were performed.Using SPSS 17 software,descriptive statistics,ANOVA,two independent samples Mann-Whitney U test and a x2 test were used for statistical analysis.P＜0.05 indicated a significant statistical difference.Results Postoperative rating scores for driving and life,diurnal distant sight vision,nocturnal vision and general vision were higher in the FS-LASIK group than in the LASEK and the LASIK groups.Patients thought the diurnal distant sight vision and scales of life improved most after surgery but they complained about glare and nocturnal vision,especially tiredness when staring at close objects,glare in nocturnal driving and low nocturnal vision scores.There was an obvious improvement in nocturnal symptoms over time but tiredness became worse.The female patients complained most about tiredness when staring at close objects,while the male patients complained most about bad nocturnal vision.Conclusion Postoperative visual quality scores for the Femto-LASIK group are higher than for the LASEK and LASIK groups.Tiredness when staring at close objects and bad nocturnal vision are postoperative problems in the long term. Key words: Keratomileusis,laser in situ; Keratectomy,subepithelial,laser-assisted; Femtosecond laser; Quality of vision
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