Enhancement And Regression Rate After Small Incision Lenticule Extraction, Photorefractive Keratectomy And Laser In Situ Keratomileusis

Published 2022 - 40th Congress of the ESCRS

Reference: FPT03.04 | Type: Free paper | DOI: 10.82333/w5s3-f861

Authors: Sung Min Kim* ¹ , Hyunjoo Kee ¹ , Hyung-jin Koo ¹

¹Nunemiso Eye Clinic,Seoul,Korea, Republic Of

Purpose

To compare enhancement rate and regression rate after SMILE, PRK and LASIK and to analyze the possible risk factor for post-op regression.

Setting

Single center(Nunemiso Eye Clinic), retrospective study

Methods

Retrospective review of 70989 cases of laser refractive surgery was done. UDVA, CDVA, SEQ, CCT was measured pre and postop. Patients were divided into 3 subgroups by SEQ and regression rates of SMILE, PRK and LASIK were compared. Also, risk factor for enhancement was analyzed by comparing retreatment and non-retreatment groups.

Results

The overall enhancement rate was 0.4%, and it was the lowest in SMILE(0.3%) compared to PRK(0.7%) and LASIK(1.0%). The overall regression rate was 1.9% and it was also the lowest in SMILE(1.7%) compared to PRK(2.2%) and LASIK(3.9%). Regression rate for SMILE, PRK and LASIK in each myopic group was 0.3%, 1.4%, 1.0% (low), 0.6%, 2.5%, 3.4% (moderate) and 3.6%, 5.4%, 6.8% (high). SEQ, lenticule thickness, lenticule diameter, RSB and PTA were shown to have statistical correlation in enhancement.

Conclusions

Post-op myopic regression occurred the least in SMILE regardless of the amount of the myopic error. SMILE would be a safer refractive surgery with lower chance of retreatment