Twelve-Month Outcomes From Low To High Myopic Astigmatism Correction With A New Refractive Corneal Lenticule Extraction

To evaluate the 12-month refractive and visual outcomes of Small Incision Guided Human-cornea Treatment (SmartSight®, SCHWIND eye-tech-solutions) from low to high Myopic Astigmatism Correction with the use of a new femtosecond laser system.

 First Eye Clinic, Seoul, Republic of Korea

This retrospective, observational case series study included 539 eyes of 273 patients who underwent SmartSight to correct myopic astigmatism and completed the 12-month follow-up. Procedures were performed with a SCHWIND ATOS femtosecond laser. Monocular corrected distance visual acuity (CDVA), uncorrected distance visual acuity (UDVA), refraction and keratometric findings were assessed pre- and post-operatively. Changes on corneal topography were also evaluated.

Preoperatively, mean manifest spherical equivalent refraction was -6.35 ± 2.51 diopters (D) (range: -1.12 to -12.75 D) and an astigmatism of 1.93 ± 1.48D (range: 0.25 to 5.75 D). Twelve months post-operatively, it was +0.37 ± 0.32 D and 0.23± 0.21 D, respectively. Spherical equivalent correction within ±0.50D was achieved in 485 eyes (90%), and cylindrical correction in 512 (95%). Preoperative corrected distance visual acuity (CDVA) was 20/20 or better in 533 eyes (99%), and postoperative uncorrected (UDVA) was 20/20 or better in 512 eyes (95%). In most cases, the ablation position on the corneal topography was concentric with the apex (visual axis), and the change in corneal thickness was consistent with the predicted value. 

Myopic astigmatism correction with SmartSight provided very good results for efficacy, safety, predictability, and visual outcomes at the twelve months of follow up.