Early visual quality outcomes after small-incision lenticule extraction surgery for correcting high myopic astigmatism

Abstract Background To evaluate early optical quality outcomes after small-incision lenticule extraction (SMILE) surgery for correcting high myopic astigmatism. Methods This retrospective study enrolled 55 eyes from 37 patients who had preoperative astigmatism of ≥2.00 diopters (D) been treated with SMILE surgery. Preoperatively, the mean cylinder was − 2.41 ± 0.54 D (range, 2.00 to 4.50 D). The and postoperative visual outcomes, refraction, higher-order aberration (HOA) at 1 3 months were compared. Refractive changes analyzed by Alpins vector method. Results Three surgery, average 0.14 0.31 D, 0.09 × 6.34°. angle error (AofE) limited within ±10°, magnitude ±1.0 in all patients. correction index (CI) 0.98 0.07, success (IOS) 0.08 0.13, flattening (FI) 0.97 0.07. Significant positive correlations found between IOS |AofE| ( P = 0.000); negative FI 0.000). total HOA, spherical aberration, vertical coma trefoil 30° increased significantly compared measurements, increase HOA closely related < 0.05). Conclusions has preferable Axis rotation during might influence undercorrection is