Abstract:AIM:To compare and research visual function(VF)and the quality of life(QOL)after Q value guided aspheric profile laser in situ keratomileusis(LASIK)by visual quality questionnaire.
METHODS: One hundred and twenty-three patients(245 eyes)were performed LASIK with Q value guided aspheric profile ablation as the intervention group, and 152 patients(304 eyes)were performed conventional LASIK as the control group. Uncorrected and best corrected visual acuity(UCVA and BCVA), refractions, corneal Q-value of the patients in the two groups were measured at postoperative 1 and 3 mo respectively, and the differences of these examinations between the two groups were analyzed. Every patient was interviewed with a questionnaire concerning VF and QOL at 3mo postoperatively, the grades were measured and analyzed between two groups.
RESULTS: At postoperative 3mo, UCVA was improved in 238 eyes(97.1%)in the intervention group and 291 eyes(95.7%)in the control group and there was no statistical difference between the two groups(χ2=0.78, P=0.38). Meanwhile, there was no significant difference in term of postoperative refractions between the two groups(0.15±0.58D vs 0.11±0.59D; t=0.75,P=0.45). All patients' corneal central Q values increased postoperatively, but the Q value of 0.28±0.10 in the intervention group was obviously lower than that of 0.67±0.13 in the control group(t=-38.71,P=0.00). The integrated VF was 50.50±5.60 in the intervention group and 48.36±6.15 in the control group, there was statistical significance between the two groups(t=3.01,P=0.00). The scores in the terms of night vision, dark visual field, fine discrimination, contrastive discrimination, glaring and asthenopia in the intervention group were higher than those in the control group, and the differences were statistically significant(all P<0.05).
CONCLUSION:Q value guided aspheric profile and conventional LASIK are safe and efficient for the correction of myopia and astigmatism. Moreover, Q guided aspheric profile LASIK can better maintain the aspheric character of the corneal surface and obtain better VF and QOL than conventional LASIK.
