Comparison of the optical quality between small incision lenticule extraction and femtosecond laser LASIK

Purpose. to investigate the visual quality after smile and femto-lasik. methods. about 123 eyes from 63 patients were enrolled in this study. the parameters were measured preoperatively and 1 week,1 month,and 3 months postoperatively using sirius system. results. the mtf curve increase slightly from low to high frequency at 3 mm and 6 mm pupil diameter after smile surgery (p<0.05) during the follow-up time comparing with the preoperative values. and the sr has a significant increase at various pupil diameters as well (p<0.05). however,there was little increase for mtf at intermediate to high frequency at 3 mm pupil diameter after femto-lasik procedure (p<0.05). and the sr had only significant increase at 3 mm pupil diameter. between smile and femto-lasik,there was no statistic difference both in mtf and sr (p>0.05) at 3 mm pupil diameter at vertical and horizontal meridian. however,significant difference was found in mtf at low to mediate frequency at 6 mm pupil diameter at vertical meridian at 1 week postoperatively (p<0.05). conclusions. both smile and femto-lasik show a great improvement in optical quality at small diameter. it was found that smile shows better optical quality than femto-lasik at larger pupil diameter,which might be good for the night vision. © 2016 ying jin et al.