Impact on binocular visual function of small-incision lenticule extraction for high myopia

In Brief Purpose: To assess whether small-incision lenticule extraction (SMILE) for high myopia reduces the binocular visual function assessed by stereoacuity, acuity, contrast sensitivity, and summation. Setting: University hospital. Design: Prospective case series. Methods: Patients with a myopic spherical equivalent of at least 6.00 diopters (D) scheduled SMILE aimed emmetropia were included. Psychophysical testing was performed correction preoperatively but no postoperatively. Stereoacuity Randot Circles test near Frisby test, acuity (monocular binocular) high-contrast Early Treatment Diabetic Retinopathy Study charts, sensitivity Pelli-Robson chart Freiburg Acuity Contrast Test. Binocular summation calculated comparing score against best monocular score. Results: A total 138 eyes 69 patients The mean changed from −7.46 D ± 1.06 (SD) to −0.23 0.40 did not change significantly postoperatively; median (interquartile range) −0.32 (−6.21 1.55) seconds arc 0.00 (−7.5 5.0) (P ≥ .06). postoperative uncorrected distance different preoperative corrected = .40). declined slightly monocularly both tests unaltered binocularly .08). following surgery .09). Conclusions: reduce is after myopia.