Intraocular Lens Calculation after Refractive Surgery: A Long-Term Retrospective Comparison of Eight Formulas.

Autor:	Rosen DB; College of Medicine, University of Arizona, Phoenix, Phoenix, AZ, USA., Heiland MB; College of Medicine, University of Arizona, Phoenix, Phoenix, AZ, USA., Tingey M; Hoopes Durrie Rivera Research Center, Hoopes Vision, Draper, UT, USA., Liu HY; McGovern Medical School, Health Science Center, University of Texas, Houston, TX, USA., Kang P; Mel and Enid Zuckerman College of Public Health, University of Arizona, Phoenix, AZ, USA., Buckner B; Hoopes Durrie Rivera Research Center, Hoopes Vision, Draper, UT, USA., Ronquillo YC; Hoopes Durrie Rivera Research Center, Hoopes Vision, Draper, UT, USA., Hoopes PC; Hoopes Durrie Rivera Research Center, Hoopes Vision, Draper, UT, USA., Moshirfar M; Hoopes Durrie Rivera Research Center, Hoopes Vision, Draper, UT, USA.; John A. Moran Eye Center, Department of Ophthalmology and Visual Sciences, School of Medicine, University of Utah Salt Lake City, UT, USA.; Utah Lions Eye Bank, Murray, UT, USA.
Jazyk:	angličtina
Zdroj:	Medical hypothesis, discovery & innovation ophthalmology journal [Med Hypothesis Discov Innov Ophthalmol] 2019 Fall; Vol. 8 (3), pp. 121-128.
Abstrakt:	The aim of this study was to compare the accuracy of 8 IOL power calculation formulas for eyes post-refractive surgery. In this Retrospective study, a chart review and data analysis of post-corneal refractive surgery patients who subsequently underwent cataract surgery with IOL implantation in Tertiary surgical center, Draper, UT, USA. The surgery was done in a single surgical center in Draper, UT by one surgeon. The study was approved by the organization's ethics board. The IOL power formulas used were Barrett True K (BTK), Average Pupil Power (APP), Shammas, Haigis, Galilei, Potvin-Hill Pentacam (PVP), OCT and Barrett True K No History (BTKNH). The percent of time each formula was within ±0.5 D and ±0.75 D of refractive prediction error was calculated. Statistical analysis was performed comparing these 8 methodologies at four post-operative follow-up time points and on the summative time points. Mean follow-up time periods were: 4 weeks, 3 months, 6 months, and 12 months. A total of 64 eyes were included in the study. All IOL formulas showed a myopic trend except APP and Shammas, which showed a hyperopic trend. All tests showed a statistically significant mean absolute value difference from zero. OCT, BTKNH, and BTK had consistently high percentages within ±0.5D and ±0.75 D of refractive error. Linear mixed model analysis showed a statistically significant change in predictive value over time for all formulas. Linear mixed model analysis suggests that it is inadequate to evaluate the performance of IOL power formulae in the short term. Longer-term follow-up is needed to determine accuracy as several factors can result in refractive changes greater than 3 months postoperatively. Our analysis did not demonstrate any formula that was clearly superior to the other methods for predicting IOL power at any time point. Competing Interests: Ethical issues have been completely observed by the authors. All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship of this manuscript, take responsibility for the integrity of the work as a whole, and have given final approval for the version to be published. No conflict of interest has been presented.
Databáze:	MEDLINE
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