Lamina Cribrosa Changes After Femtosecond Laser-Assisted Laser In Situ Keratomileusis And Photorefractive Keratectomy In Myopic Eyes
Published 2023 - 41st Congress of the ESCRS
Reference: FP15.06 | Type: Free paper | DOI: 10.82333/q6b5-ph77
Authors: Sezer Haciagaoglu* 1 , Munise Altinbas 1 , Alev Ozcelik Kose 2
1Department of Ophthalmology,Medipol University,Istanbul,Türkiye, 2Ophthalmology,University of Health Sciences Haydarpasa Education and Research Hospital,Istanbul,Türkiye
Purpose
To investigate short-term changes in deep optic nerve head structure following femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) vs. photorefractive keratectomy (PRK) in patients with myopia.
Setting
Istanbul Medipol University School of Medicine, Ophthalmology Department, Istanbul, Türkiye
Methods
Prospective analysis was performed in 54 eyes of 27 patients who underwent FS-LASIK and 36 eyes of 18 patients who underwent PRK. Enhanced depth imaging (EDI) spectral domain optical coherence tomography (SD-OCT) was performed in each eye that underwent FS-LASIK and PRK surgery. EDI SD-OCT images were created at baseline, postoperative 1 day, and 1 month. Lamina cribrosa thickness (LCT), lamina cribrosa curve depth (LCCD) and lamina cribrosa curvature index (LCCI) were measured by two investigators.
Results
During follow-up, there were no significant differences in LCT, LCCD, and LCCI in both treatment group. In FS-LASIK group, the mean preoperative LCT was 186.5±20.2 µm. There was no change at postoperative 1 day (186.1±28.1 µm, p>0.05), increase at 1 month but not statistically significant (189.2±22.2 µm, p>0.05). In PRK group, the mean preoperative LCT was 191.6±21.0 µm. There was no change at postoperative 1 day and 1 month (190.4±16.5 µm, 191.8±17.1 µm, p>0.05 respectively).
Conclusions
The transient increase in intraocular pressure during FS-LASIK does not appear to induce LC thickness changes. Similarly, FS-LASIK and PRK do not cause any structural damage to the lamina cribrosa in the short term.