Comparison Of Small Incision Lenticule Extraction Surgery And Wavefront-guided LASIK Surgery In Treating Myopia

Purpose:To compare the outcomes of small incision lenticule extraction surgery and wavefront-guided LASIK surgery in treating myopia.Methods:In this study34eyes of17patients who underwent SMILE were randomly matched to39eyes of20patients who underwent WASCA.Before surgery there were no significant differences between these two groups in spherical equivalence、age、gender and scotopic pupil diameter. All the patients were followed up for more than three months. UCVA、BCVA、spherical equivalence、contrast sensitivity without glare、contrast sensitivity with glare and higher-order aberration before、1month and3month after surgery were compared between the two groups.Results:There were no statistically significant differences in uncorrected or best corrected visual acuity and spherical equivalence after two surgical procedures(p>0.05).3months after surgery, SMILE group had a significant larger percentage than WASCA group of the eyes whose SE range in-0.50D to+0.50D(p<0.05).There were no significant differences in contrast sensitivity with or without glare between SMILE and WASCA before.1month and3months after surgery(p>0.05).Meanwhile,both groups presented a lower level of mean contrast sensitivity with or without glare comparing with preoperative data. There were no statistically significant differences in higher-order aberrations induced by SMILE and WASCA1month and3months after surgery(p>0.05).However, SMILE induced much fewer spherical aberration than WASCA(p<0.05).conclusion:Both SMILE and WASCA perform good efficiency、safety、 stability and predictability in treating myopia. Meanwhile SMILE induces much fewer spherical aberration and shows higher visual quality. However, the long term outcomes of SMILE still need to be evaluated.