Two- Year Follow Up Of Posterior Corneal Elevation After Small Incision Lenticule Extraction For Moderate Myopia
Published 2024 - 42nd Congress of the ESCRS
Reference: FP20.06 | Type: Free paper | DOI: 10.82333/k6kg-5483
Authors: Shaimaa Azzam* 1 , Hazem Elbedewy 2
1ophthalmology,faculty of medicine, helwan university,cairo,Egypt, 2Ophthalmology,faculty of medicine, tanta university,Tanta,Egypt
Purpose
Long-term follow up for the changes in the posterior corneal elevation after small incision lenticule extraction (SMILE) for moderate myopia.
Setting
prospective study including 35 patients (70 eyes) who underwent SMILE operation
Methods
Assessments were done 6 months and 2 years after surgery, including posterior central elevation (PCE), the average posterior central elevation change (ΔPCE) using pentacam, the uncorrected distance visual acuity (UCDVA), best corrected distance visual acuity (BCDVA) and manifest refraction spherical equivalent (MRSE) . These data were compared to the preoperative ones.
Results
The safety and efficacy indices were 1.00 ± 0.03 and 0.95 ± 0.08 respectively. All the eyes were within ± 1.00 D two years after surgery. At the sixth postoperative month, the mean PCE was 2.61 ± 2.88 and the mean ΔPCE was 0.68 ± 3.45. After 2 years of surgery, the mean PCE was 1.98 ± 2.72 and the mean ΔPCE was 0.02 ± 1.17. Thirty-five eyes (50%) showed +ve ΔPCE (foreword posterior corneal surface protrusion) at 6 months of surgery, 30 of them (85.7%) showed decreased positivity (posterior surface moved posteriorly), while 5 eyes of them (14.3%) remained stable 2 year after surgery.
Conclusions
There was a change detected in the posterior corneal surface after SMILE. With 2- year follow up, these changes remain stable and within normal range, so SMILE is safe for moderate myopia with 2 years observation.