Corneal Stress-Strain Index Post-Laser In Situ Keratomileusis (Lasik) Surgery: One Year Data
Published 2023 - 41st Congress of the ESCRS
Reference: PO0938 | Type: Free paper | DOI: 10.82333/ag37-s475
Authors: Vaishal Kenia* 1 , Raj Kenia 2 , Sneha Maru 1 , Nagalaxmi Mudaliya 3 , Onkar Pirdankar 4
1Cornea and Refractive ,Kenia Eye Hospital,Mumbai ,India, 2Ophthalmology,Kenia Foundation,Mumbai ,India, 3Optometry,Kenia Eye Hospital,Mumbai ,India, 4Clinical Research,Kenia Medical and Research Foundation,Mumbai,India
Purpose
To evaluate corneal stress-strain index (SSI) post-laser in situ keratomileusis (LASIK) surgery: One year data.
Setting
Private tertiary eye hospital, Mumbai
Methods
A retrospective study wherein patients who had undergone femtosecond bladeless LASIK between July and December 2019 were enrolled. Patients of age group 20–40 years, best-corrected visual acuity of 20/20, intraocular pressure (IOP) <22 mmHg, pre-LASIK pachymetry >500 microns, and corneal astigmatism ≤3.00 D were included. Subjects with a prior history of refractive surgery, any other ocular or systemic disease, poor-quality scans, intraoperative complications, and missing data were excluded. Corneal biomechanical properties including SSI were analyzed using Corvis ST and compared using the Paired T-test at pre-LASIK, and 1-month post-operatively.
Results
Overall, 15 eyes with mean±SD age of 28.50±7.4years were included. Mean±SD spherical equivalent refractive error and IOP were -4.50±1.98 D and 15.60±3.74 mmHg respectively. Mean±SD SSI at baseline and post op 1 year was 0.76±0.16 and 0.81±1.62. Paired t test revealed non statistical significant difference between pre and post LASIK SSI (P=0.05)
Conclusions
At one year follow up, SSI was found to be similar pre and post femto LASIK, however large sample size would be required to confirm the changes and stability in SSI post-refractive surgery.