Stability of corneal topography and aberrometry after hyperopic laser in situ keratomileusis with a 500-Hz excimer laser platform: A 3-year follow-up study
| Autor: | Samuel Arba-Mosquera, Jorge L. Alió, Ana B. Plaza-Puche, Veronica Vargas, Pilar Yébana |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male 0209 industrial biotechnology medicine.medical_specialty Materials science Time Factors medicine.medical_treatment Keratomileusis Laser In Situ Visual Acuity Keratomileusis 02 engineering and technology Refraction Ocular law.invention Cornea 03 medical and health sciences 020901 industrial engineering & automation 0302 clinical medicine law Ophthalmology Refractive surgery Aberrometry medicine Humans Postoperative Period Retrospective Studies medicine.diagnostic_test Keratometer Excimer laser Corneal Topography General Medicine Middle Aged Laser Corneal topography Spherical aberration Hyperopia 030221 ophthalmology & optometry Female Lasers Excimer Follow-Up Studies |
| Zdroj: | European journal of ophthalmology. 30(6) |
| ISSN: | 1724-6016 |
| Popis: | Purpose:The aim of this study is to analyze the long-term stability of the corneal topography, the functional optical zone, and the refractive stability throughout 3 years following laser in situ keratomileusis surgery for hyperopia using a 500-Hz excimer laser system.Methods:This retrospective consecutive observational case series study comprised 66 eyes that underwent laser in situ keratomileusis to correct hyperopia with a postoperative follow-up of 3 years. Laser in situ keratomileusis procedures were performed using the SCHWIND Amaris 500-Hz excimer laser. Main outcomes measured were stability of the functional optical zone at corneal topography and corneal aberrometry.Results:Statistically significant differences were found in simulated keratometry (K2 (steep meridian) and Km (mean keratometry)) between 3 and 36 months postoperatively ( p ⩽ 0.01); these differences disappeared at 12 and 36 months ( p ⩾ 0.18). No statistically significant changes were observed in the horizontal and vertical diameter of the functional optical zone throughout the whole follow-up ( p ⩾ 0.07). A statistically significant difference was found in the spherical aberration between 3 and 36 months ( p = 0.02); this difference disappeared when compared between 12 and 36 months ( p = 0.72). Statistically significant correlations were detected between the vertical functional optical zone and coma root mean square ( r = –0.510, p < 0.01) and between the vertical functional optical zone and spherical aberration ( r = 0.441, p = 0.02) 36 months after surgery.Conclusion:Following 3 years of hyperopic laser in situ keratomileusis with a 500-Hz Amaris excimer laser, keratometry, functional optical zone, and corneal aberrations remain stable from 1 year after surgery. Topographical regression is not observed in hyperopic laser in situ keratomileusis with this excimer laser technology from 1 year after surgery. |
| Databáze: | OpenAIRE |
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