Refractive error after cataract surgery using Barrett UniversalⅡ and other formulas Toyohiro Tsumura 1 , Hiroyuki Nomoto 2 , Hidetaka Yamaji 3 1Department of Ophthalmology, Takamatsu Municipal Hospital Kagawa Clinic 2Nomoto Eye Clinic 3Shirai Hospital pp.347-354
Published Date 2019/3/15
DOI https://doi.org/10.11477/mf.1410213081
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Abstract Purpose:To report refractive errors after cataract surgery with implantation of intraocular lens(IOL)using Barrett UniversalⅡ(BUⅡ)and other formulas.

Cases and Method:This study was made on 324 eyes of 189 patients who received cataract surgery in the past 3 years. The IOL constant for BUⅡ and SRK/T was calculated in another series of 300 eyes that received surgery in the past 4 years. Actual refraction was measured one month after surgery and was compared with the predicted value after BUⅡ, SRK/T and Haigis(IOL constants were calculated by Dr. Hill and TOMEY) formula.

Findings:Refractive error after surgery averaged(absolute averaged)0.01±0.42(0.32±0.26)D for BUⅡ, 0.05±0.43(0.34±0.26)D for SRK/T, −0.09±0.44(0.34±0.29)D for Haigis(Dr. Hill), and 0.04±0.44(0.34±0.25)D for Haigis(TOMEY). The differences were significant among the 4 groups in averaged refractive error, but no differences in absolute averaged refractive error. Frequency of refractive error within ±0.50D and within±1.00D was not significantly different among the 4 groups.

Conclusion:BUⅡ formula showed lesser postoperative refractive error than other current formulas in absolute averaged refractive error in cataract surgery.

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