Clinical curative effect comparison of the iris localization and Kappa angle correction femtosecond LASIK

Objective To compare the clinical curative effect of iris localization and Kappa Angle correction on femtosecond LASIK surgery. Methods Prospective randomized controlled study. Matching t test was used on two groups of postoperative 1 month visual acuity, contrast sensitivity respectively and preoperative best corrected visual acuity, best corrected vision wear glasses measuring contrast sensitivity. Two independent sample t test and nonparametric test were used on between the two groups of postoperative 1 month visual acuity, contrast sensitivity compared with preoperative best corrected visual acuity, best corrected vision wear glasses contrast sensitivity increased value and Pentacam measurement of cutting off center value pairs. Two groups of postoperative 1 month visual acuity, contrast sensitivity increased value with Pentacam measurement of cutting off center value, postoperative residual spherical mirror, l enticular mirror and cylindrical mirror axis for correlation analysis. Results Two groups of postoperative 1 month visual acuity, contrast sensitivity and preoperative best corrected visual acuity, best corrected vision wear glasses measuring contrast sensitivity difference was statistically significant. Between the two groups of postoperative 1 month visual acuity, contrast sensitivity and Pentacam measurement of cutting off center value differences had no statistical significance. Conclusions The two kinds of operation method can effectively avoid cutting off center of LASIK, get better than that of preoperative vision and contrast sensitivity. Two kinds of operation method postoperative visual acuity, contrast sensitivity increase value and cutting off center has no difference. Key words: Femtosecond laser; The iris localization; Kappa Angle correction