Scientific article
Open access

Visual outcomes of small-incision lenticule extraction (SMILE) in thin corneas

Published inJournal of clinical medicine, vol. 11, no. 14, 4162
Publication date2022-07-18
First online date2022-07-18

We aimed to find out whether thin (≤500 μm) or normal (>500 μm, control) corneal thickness would impact efficacy and safety outcomes of small-incision lenticule extraction (SMILE). We retrospectively analyzed medical records of adult patients who had undergone SMILE. A total of 57 eyes were included in the "thin corneas" group and 180 eyes in the "control" group. At one month after surgery, rates of patients with uncorrected distance visual activity (UDVA) ≥ 0.8 were significantly higher in patients from the control group compared to the "thin corneas" group (87 vs. 71%, respectively p < 0.01), though rates were comparable at 3 months (87 vs. 76%, respectively, p > 0.05). SMILE had comparable safety in patients with thin and normal corneas. Procedure result predictability was comparable between groups. Regression analysis demonstrated that cap thickness impacted posterior corneal biomechanics, and the volume of removed tissue had a higher influence in patients with thin corneas. Moreover, an increase in cap thickness was associated with better final BCVA. Further study is needed for the evaluation of the impact of thin corneas on SMILE outcomes and planning. Our study also indicates that patients with thin corneas might require a different approach to nomogram calculation.

  • Refractive surgery
  • Thin cornea
  • PRK
Citation (ISO format)
ESKINA, Erika et al. Visual outcomes of small-incision lenticule extraction (SMILE) in thin corneas. In: Journal of clinical medicine, 2022, vol. 11, n° 14, p. 4162. doi: 10.3390/jcm11144162
Main files (1)
Article (Published version)
ISSN of the journal2077-0383

Technical informations

Creation09/27/2022 3:28:00 PM
First validation09/27/2022 3:28:00 PM
Update time03/16/2023 9:05:38 AM
Status update03/16/2023 9:05:37 AM
Last indexation05/06/2024 2:39:41 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack