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David Boulos Kneiber, Bishoy Said, Samir I Sayegh; Post-Operative Analysis Following Refractive Cataract Surgery on 53 Eyes of a Group of 200 Operated in a Southern California Clinic. Invest. Ophthalmol. Vis. Sci. 2016;57(12):1999.
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© ARVO (1962-2015); The Authors (2016-present)
To analyze the refractive results of a subset of 300 eyes of 200 patients operated in a Southern California clinic and to compare them to established benchmarks in order to identify tools to improve surgical outcomes.
This is a retrospective study where 53 eyes of 43 patients were analyzed for refractive outcomes with a minimum of three months of follow up. Each patient had their biometry obtained by IOL Master with a multi-formula approach where a single surgeon (BS) selected each IOL. All patients were targeted to plano except one patient with near aim, and the same surgeon operated all cases. Postoperative refractions were used to calculate spherical equivalents and the postoperative uncorrected and best corrected visual acuities were obtained. The full data was then run retrospectively using the UniversIOL calculator (SIS), and differences including the "formula spread" technique were used to assess the results.
53 eyes of 43 patients were analyzed. The average age was 65 years and the average preoperative best corrected visual acuity was 20/40. The female to male ratio was 24:19 and there were a mix of ethnicities. The average myopic preoperative refractive error was -2.65 diopters (D), and the average hyperopic preoperative refractive error was +1.17 D. The average astigmatism was 1.31 D. The postoperative refractive results obtained were well within the accepted benchmarks: 100 % within 1 D and 82 % within 0.5 D of predicted postoperative refraction. The retrospective runs using UniversIOL calculator were particularly useful for further analysis and for correlating the error with the formula spread feature unique to that IOL calculator.
Excellent results in cataract refractive surgery can be obtained with appropriate biometry and computational tools. Possible improvements for accurate IOL power selection in prediction of postoperative refractive state using a universal calculator exist. The remaining patients of a group of 300 eyes are under further analysis to confirm our findings. A prospective study will follow.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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