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Refractive error after cataract surgery using individual A constants for two intervals of ocular axis Toyohiro Tsumura 1 , Hiroyuki Nomoto 2 , Hidetaka Yamaji 3 1Dept of Ophthalmology, Takamatsu Municipal Hospital Kagawa Clinic 2Nomoto Eye Clinic 3Shirai Hospital pp.727-733
Published Date 2017/5/15
DOI https://doi.org/10.11477/mf.1410212266
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Abstract Purpose: To report refractive error after cataract surgery using individual A constants for two intervals of ocular axis.

Cases and Method: This retrospective study was made on 171 eyes of 101 patients who received cataract surgery in the past 16 months. Power of intraocular lens(IOL)was calculated using SRK/T formula. Prospective refraction for each IOL had been based on two individual A constants assuming 0.5 mm or 1.0 mm as interval of ocular axis in the past 4 years. Both groups were evaluated regarding subjective refraction one month after surgery.

Results: Subjective and absolute refractive error one month after surgery averaged 0.12±0.43D and 0.36±0.27D respectively by assuming 0.5 mm as interval of ocular axis. The values averaged 0.10±0.43D and 0.35±0.27D respectively by assuming 1.0 mm as the interval of ocular axis. The differences were not significant. Ratio of cases close to predicted refraction was 27.5% in 0.5 mm group, 48.5% in 1.0 mm group, and 24.0% for both groups.

Conclusion: Actual error in refraction was the same when using individual A constants by assuming 0.5 mm or 1.0 mm as the interval of oxular axis.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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