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Accuracy of the constant A of single-piece acrylic lens for IOL MasterTM Keiji Suga 1 , Yoshio Hirano 1 , Munenori Yoshida 1 , Yuichiro Ogura 1 1Dept of Ophthalmol and Vis Sci,Nagoya City Univ Grad Sch of Med Sci pp.1113-1118
Published Date 2009/7/15
DOI https://doi.org/10.11477/mf.1410102790
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Abstract. Purpose:To evaluate the constant A for single-piece acrylic lens in cataract surgery with or without vitrectomy using IOL MasterTM. Cases and Method:This study was made on 94 eyes that received implantation of SN60WF(Alcon,Inc). Cataract surgery alone was performed on 60 eyes and with vitrectomy in 34 eyes,nine of which received vireous-gas exchange. Axial length was measured by IOL MasterTM. Power of intraocular lens was calculated by SRK/T formula by setting the constant A at 119.2. Cases were followed up for 3 months. Results:Postoperative refraction was close to intended value after cataract surgery alone. It shifted towards myopia by 0.5 diopters after simultaneous vitreous surgery. Conclusion:The value of 119.2 as constant A is appropriate for SN60WF and IOL MasterTM after cataract surgery alone. Modification of constant A is needed for simultaneous vitrectomy because of myopic shift after surgery.


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

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