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Refractive error in eyes implanted with either of three types of intraocular lens with the same A constant Toyohiro Tsumura 1 , Hiroyuki Nomoto 2 , Hidetaka Yamaji 3 1Dept of Ophthalmol, Takamatsu Munic Hosp Kagawa Clin 2Nomoto Eye Clin 3Dept of Ophthalmol, Mitoyo Gen Hosp pp.1539-1546
Published Date 2013/9/15
DOI https://doi.org/10.11477/mf.1410104909
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Abstract. Purpose:To report errors of refraction during and after cataract surgery followed by implantation of either of 3 types of intraocular lens(IOL)with the same A constant. Cases and Method:This study was made on 280 eyes that received cataract surgery during past 3 years. SA(N)60AT was implanted in 117 eyes, NY-60 in 59 eyes, and NS-60YG in 104 eyes. Refraction was measured during surgery, the next day, 7~10 days, and one month after surgery. Results:Error of refraction during surgery approximated the predictive value at +0.07D for SA(N)60AT and -0.03 for NY-60. It shifted towards hyperopia at +0.88D for NS-60YG. One month later, refraction implanted with SA(N)60AT, NY-60 and NS-60YG averaged -0.46D, -0.58D and +0.12D respectively. Personal A constant of the lens was 118.08, 117.86 and 118.56 respectively. Conclusion:There was a shift towards myopia in eyes implanted with SA(N)60AT or NY-60, and towards hyperopia implanted with NS-60YG one month after surgery. The observed difference appeared to be due to the shape of each IOL.


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

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