Retrospective Analysis of Wavefront-Optimized Myopic LASIK: Comparison of Preoperative to Postoperative Astigmatism and High Order Aberrations: Trefoil and Coma Specifically: Could Topography-Guided Original Customization Had Addressed the Above?
Journal Title: Journal of Ophthalmology and Advance Research - Year 2023, Vol 4, Issue 3
Abstract
Purpose: The purpose of this retrospective study was to evaluate and analyze visual outcomes by recording pre and postoperative trefoil, coma and refractive astigmatism in wavefront optimized myopic LASIK. Methods: In this retrospective case review 200 eyes (one hundred patients) that had undergone myopic (with corresponding astigmatism) wavefront-optimized LASIK using the FS200 femtosecond and EX500 excimer lasers (Alcon/Wavelight, Erlagen, Germany) were evaluated. The 12 months post-operative UDVA and CDVA, low (myopia and/or astigmatism) along with high order aberration C6 to C9 changes were compared to the pre-operative values. Pre-operative topography data were available and used to generate for this study hypothetical treatment data (low and high order aberrations) if Topography-Guided (TG) with TMR cylinder amount and axis adjustment was used instead of the actual WFO. Results: Mean values at 12 months: UDVA of 20/22 and CDVA of 20/20. The postoperative refractive error in Diopters was -0.20±0.46 sphere and – 0.45±0.27 cylinder. The average absolute value for the high order aberrations studied were pre-op: C6: 0.10±0.12, C7: 0.19±0.16, C8: 0.15±0.12, C9: 0.09±0.09 μm and respectively post-op, C6: 0.11±0.10, C7: 0.46±0.38, C8: 0.34±0.30, C9: 0.11±0.13 μm. If topography-guided customization with TMR was originally employed an addition mean -0.36D of astigmatism would have been attempted. Conclusion: Wavefront optimized ablations do not address HOA, pre-existing trefoil (C6, C9) in this group essentially did not change while coma (C7 and C8) increased despite the essential achievement of emmetropia. In theory topography-guided customization with TMR may had offered improved C7 and -C8 outcomes, along with superior cylindrical correction.
Authors and Affiliations
Anastasios John Kanellopoulos
Keywords
Related Articles
- EP ID EP724146
- DOI https://doi.org/10.46889/JOAR.2023.4307
- Views 48
- Downloads 0
Communication between the Eye Care Practitioner and Parents of the Myopic Child
This article is based on a poster presented at the International Myopia Conference which took place in Rotterdam, Holland in August 2022. The poster and the article were both self-funded. Due to lack of space on the post...
The Influence of Angles Kappa and Alpha and Pupil Size on Vision after Implantation of Soleko Evolve and Lucidis Lenses with a “Pure” EDOF Structure
Background: Two models of artificial intraocular lenses with a “pure” EDOF structure, i.e. Soleco Evolve and Lucidis, were used in 36 patients in 43 eyes. Results of postoperative visual function were analysed, like al...
Pentacam Anterior Float Anomaly Due to Band Shaped Keratopathy
A 27 year old female with best corrected visual acuity 20/60 and 20/30 in the right (OD) and left (OS) eyes respectively presented to us for refractive surgery. Refractive errors were -9.25 D and -7 D spherical equival...
Change in Corneal Epithelial Thickness After Photo Refractive Keratectomy (PRK)
Purpose: The study of change of the epithelium of the cornea in two points after Photo Refractive Keratectomy (PRK): at the peak of the cornea (ETpeak) and in the middle of the cornea (ETcenter). The study of the change...
Masquerade Syndrome: Diagnostic Challenges in a Case of Primary Central Nervous System Lymphoma
The objective of this investigation was to present a case of masquerade syndrome secondary to primary CNS lymphoma in a Northern Ontario community. Masquerade syndrome of primary CNS lymphoma in the eye can often be mi...