ESCRS - PO475 - Comparative Study Of Refractive Outcomes After Photorefractive Keratectomy And Small-Incision Lenticule Extraction In Moderate Myopia

Comparative Study Of Refractive Outcomes After Photorefractive Keratectomy And Small-Incision Lenticule Extraction In Moderate Myopia

Published 2022 - 40th Congress of the ESCRS

Reference: PO475 | Type: Free paper | DOI: 10.82333/dywe-ma34

Authors: Shaimaa Mohammad Azzam* 1 , Abdel Rahman Elsebaey 2 , Khaled Elghonemy 2 , Ahmed Basiony 2

1Ophthalmology department,Faculty of medicine , Helwan university,Cairo,Egypt, 2Ophthalmology department,faculty of medicine , menoufia university,shbein elcom,Egypt

Purpose

To compare the refractive outcomes after photorefractive keratectomy (PRK) and small incision lenticule extraction (SMILE) in moderate myopia.

Setting

PRK and SMILE are two flapless procedures for the correction of myopia and astigmatism. In PRK, excimer laser is used for photoablation whereas in SMILE, the femtosecond laser is used to create the lenticule 

Methods

Retrospective study conducted on 80 patients (160 eyes) classified into two groups (PRK, SMILE)  ,40 patients (80 eyes) were included in each group . Assessment was between 6 months to 3years postoperatively comparing the uncorrected distance visual acuity (UCDVA), best corrected distance visual acuity (BCDVA), manifest refraction spherical equivalent (MRSE) with the preoperative data in addition to assessing the efficacy, safety and predictability in each procedure.

Results

The mean postoperative UCDVA in PRK group was 0.96 ± 0.06 and in the SMILE group was 0.95± 0.08. The mean postoperative BCDVA in PRK group was 0.96 ± 0.06 and in the SMILE group was 0.97 ± 0.07 . The mean postoperative MRSE in PRK group was -0.24 ± 0.34 and in the SMILE group was -0.30 ± 0.20 . The mean efficacy index in the PRK group was 0.99 ± 0.05 and in the SMILE group was 0.99 ± 0.07 (P 0.456). The mean safety index in the PRK group of all eyes was 1.00 ± 0.03 and in the SMILE group was 1.00± 0.04 (P 0.704). In PRK group, 90 % of all eyes are within ± 0.50 D of intended refraction and 100 % were within ± 1.00 D. In SMILE group, 95 % of all eyes are within ± 0.50 D of intended refraction and 100 % were within ± 1.00 D.

Conclusions

Photorefractive Keratectomy (PRK) and Small Incision Lenticule Extraction (SMILE) procedures showed excellent efficacy, safety and predictability in moderate myopia whereas SMILE was noticed to be better in predictability than PRK.