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Hyoung Won Bae, Sang Hyup Lee, Si Hyung Lee, Samin Hong, Gong Je Seong, Chan Yun Kim; The Accuracy of Power Prediction for Cataract Surgery and Triple Procedure in Patients with Open-Angle Glaucoma. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):2680.
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To compare the power prediction accuracies of patients with open-angle glaucoma (OAG) who underwent cataract surgery only, cataract surgery with previous trabeculectomy, or triple procedure.
A total of 56 eyes of 56 OAG patients who had a cataract surgery or triple procedure between July 2006 and June 2013 were enrolled. We classified OAG subjects into 3 groups: (1) only phacoemulsification (OP) group; (2) phacoemulsification after trabeculectomy (PAT) group; and (3) phacoemulsification combined with trabeculectomy (PCT) group.
The mean age was significant lower in PAT group and the portion of female was larger in OP group. Preoperative intraocular pressure was significantly higher in PCT group. When comparing 3 groups at 2 months after surgery, spherical equivalents (SEs) of PAT and PCT groups showed a significant myopic shift than that of OP group. Prediction error (PE; the difference between postoperative and predicted SE) of PCT group was significantly more myopic than that of OP group (p=0.005), and the absolute value of PE (APE) of PAT group was significantly higher than that of OP group (p=0.033). Using linear mixed model, the PE calculated by SRK II formula was more accurate than SRK T formula in PAT and PCT groups (p=0.032 and p=0.035, respectively).
The power prediction accuracies of PAT and PCT group were inferior to that of OP group. The postoperative SEs of PAT and PCT group tended to shift more myopically than predicted. The SRK II formula was considered to be more appropriate for predicting the postoperative refractive power in PAT and PCT groups.
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