Effects of Ocular Residual Astigmatism on Refractive Outcomes for Myopia Correction After Keratorefractive Lenticule Extraction Surgery.
| Autor: | Su Q, Liang S, Cao H, Shan M, Wang Y |
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| Jazyk: | angličtina |
| Zdroj: | Journal of refractive surgery (Thorofare, N.J. : 1995) [J Refract Surg] 2024 Dec; Vol. 40 (12), pp. e966-e973. Date of Electronic Publication: 2024 Dec 01. |
| DOI: | 10.3928/1081597X-20241016-02 |
| Abstrakt: | Purpose: To evaluate the effects of ocular residual astigmatism (ORA) on refractive outcomes for patients with astigmatism after keratorefractive lenticule extraction (KLEx) and to identify the ratio of the ORA/manifest refractive cylinder at the corneal plane (MRC) resulting in a greater index of success (IOS). Methods: In total, 892 right eyes that underwent KLEx surgery were included. Astigmatic changes were evaluated using Alpins' vector analysis. Surgical outcomes grouped by ORA/MRC and ORA were compared. In stage 1, eyes were divided into two groups with an ORA/MRC cutoff value of 1. In stage 2, patients with an ORA/MRC ratio of greater than 1 were divided into two groups: those with an ORA of 1.25 diopters (D) or greater and those with an ORA of less than 0.50 D. ORA/MRC thresholds leading to a high IOS were analyzed using receiver operating characteristic (ROC) curves. Results: In stage 1, the mean IOS was 0.13 and 0.21 for the low and high ORA/MRC groups, respectively ( P < .001). In stage 2, for high ORA/MRC, the IOS was significantly greater when the ORA was greater than 1.25 D than when the ORA was less than 0.50 D (0.27 versus 0.13, P < .001). ROC curves revealed that participants with an ORA/MRC ratio of greater than 1.8 were more likely to have a higher IOS ( P < .001). Conclusions: Patients with a smaller ORA can obtain better correction results. An ORA/MRC ratio of greater than 1.8 may increase the risk of poor astigmatism correction with KLEx. The application of vector planning may improve the refractive outcomes of KLEx. [ J Refract Surg . 2024;40(12):e966-e973.] . Competing Interests: Disclosure: The authors have disclosed no potential conflicts of interest, financial or otherwise. |
| Databáze: | MEDLINE |
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