Abstract:

Objective To compare the visual quality of myopic astigmatism with small-incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK). Design Retrospective case series. Participants 19 cases of patients with myopia were included from 2015 to 2017 in Binzhou Hubin Aier Eye Hospital, in which SMILE surgery were performed on one eye (SMILE group), and FS-LASIK were performed on the other eye (FS-LASIK group) duo to corneal scarring or thin cornea. Methods All patients were followed up for 3 months. Uncorrected distance visual acuity （UCVA）, manifest refraction and corneal aberrations were measured preoperatively and at 3 months postoperatively. Main Outcome Measures UCVA, manifest refraction and corneal aberrations. Results Three months after surgery, there were no statistically significant differences in UCVA or best corrected visual acuity （BCVA） and spherical equivalence （SE） between SMILE group and (FS-LASIK group (P>0.05). The SMILE group had a significantly higher percentage of eyes whose SE range was -0.50 D to +0.50 D compared with the FS-LASIK group (χ2=0.279, P=0.59). There were statistically significant differences in higher-order aberrations, spherical aberrations induced by SMILE and FS-LASIK 3 months after surgery (t=-3.29, -3.41; P=0.02, 0.02). The SMILE group induced far fewer spherical aberrations than FS-LASIK group(t=-3.43, -3.45; P=0.01，0.01). There were no statistically significant differences on horizontal coma induced by both groups (t=-0.37; P=0.72). The FS-LASIK group induces far fewer vertical coma (t=2.71; P=0.04). Conclusion Short-term follow-up results showed that SMILE had fewer total high-order aberrations and spherical aberrations than FS-LASIK, and there was no significant difference in coma aberration between SMILE and FS-LASIK. (Ophthalmol CHN, 2019, 28: 302-306)

Key words:  small incision lenticule extraction, femtosecond laser-assisted laser in situ keratomileusis , aberration, visual quality