Comparison of keratometry using SS-OCT and dual Scheimpflug-Placido imaging in postmyopic corneal refractive surgery eyes.
| Autor: | Khimani K; From the Blanton Eye Institute, Houston Methodist Hospital, Houston, Texas (Khimani, Ordonez, Pandit); University of Texas Medical Branch, Galveston, Texas (Khimani, Pandit); Houston Methodist Eye Associates, Houston, Texas (Pandit)., Ordonez A, Pandit RT |
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| Jazyk: | angličtina |
| Zdroj: | Journal of cataract and refractive surgery [J Cataract Refract Surg] 2023 Jan 01; Vol. 49 (1), pp. 16-20. |
| DOI: | 10.1097/j.jcrs.0000000000001045 |
| Abstrakt: | Purpose: To compare simulated (SimK) and total (True-K) keratometry and corneal astigmatism values between the IOLMaster 700 (IOLM) and Galilei G4 (G4) devices in postmyopic laser refractive surgery eyes. Setting: Methodist Eye Associates, Blanton Eye Institute, Houston Methodist Hospital, Houston, Texas. Design: Retrospective cohort study. Methods: A chart review was conducted on patients with prior myopic laser-assisted in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK), undergoing phacoemulsification at a single institution from May 2019 through January 2022, who underwent imaging with both the IOLM and G4. Exclusion criteria were prior radial keratotomy, keratoectatic diseases, and inability to obtain a reliable image. Mean, flat, and steep SimK and True-K (TK from the IOLM and TCP IOL from the G4) values and astigmatism magnitude were compared. Results: 50 eyes of 50 patients were included. The mean difference in SimK and True-K between devices (IOLM - G4) was -0.04 (95% CI -0.13 to 0.06; P > .05) diopters (D) and 1.14 (95% CI 1.02 to 1.25; P < .05) D, respectively. The IOLM measured steeper True-K values than the G4. There were no statistically significant differences between devices for all other SimK values, whereas for True-K there were significant differences in flat K and steep K ( P < .05), but not astigmatism magnitude. Conclusions: Despite an overall good correlation in postmyopic laser refractive surgery eyes in keratometry and astigmatism measurements, there is a significant difference in True-K, with the IOLM measuring steeper values by about 1.0 D compared with the G4, similar to prior studies on nonrefractive surgery eyes. (Copyright © 2022 Published by Wolters Kluwer on behalf of ASCRS and ESCRS.) |
| Databáze: | MEDLINE |
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