Topography-Guided Photorefractive Keratectomy And Collagen Cross-Linking For Post Lasik Ectasia
Published 2024 - 42nd Congress of the ESCRS
Reference: PO1107 | Type: Poster | DOI: 10.82333/282y-dg29
Authors: Maheshver Shunmugam* 1 , Simon Holland 1 , Gregory Moloney 1 , David Lin 2 , Natalie Yang 1
1Ophthalmology,University of British Columbia,Vancouver,Canada, 2Pacific Laser Eye Centre,Vancouver,Canada
Purpose
To evaluate the utility of Topography-Guided Photorefractive Keratectomy (TG-PRK) with corneal cross-linking (CXL) for post-LASIK ectasia (PLE) using a Schwind Amaris 1050 excimer laser (SA).
Setting
Private surgical centre in Vancouver, Canada
Methods
Retrospective cohort study examining eyes that underwent TGPRK and CXL for the treatment of PLE using the Athens protocol.
Outcome measures included preoperative and 12-month postoperative uncorrected distance visual acuity (UDVA), best corrected visual acuity (CDVA), manifest refraction, and topographic cylinder.
Results
Eighty-two eyes were included in this analysis. Only those eyes with 12 months follow up post-operatively were included.
Fifty-nine eyes (72%) experienced an UDVA better than 6/12 post-operatively.
Thirty-six eyes (41%) experienced improved CDVA by at least 1 Snellen line.
Twenty-one eyes (26%) gained 2 or more lines on Snellen chart post-operatively, while a single eye (1.2%) lost 2 lines or more.
Mean astigmatism was reduced from -3.31±1.61D to -1.11±1.06D.
The mean spherical equivalent improved from -1.28±2.68D to -0.45±1.53D.
No cases showed ectatic progression.
Conclusions
TG-PRK with CXL using the Athens protocol for post-LASIK ectasia was found to be both safe and effefctive as a potential alternative treatment for post-LASIK ectasia. This procedure is a viable alternative for post-LASIK ectasia patients intolerant of contact lenses.