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Predictability of intraocular lens power calculation after acute angle-closure glaucoma attack

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Session Details

Session Title: Cataract
Session Date/Time: Saturday 10/02/2018 | 08:30-11:00
Paper Time: 09:24
Venue: Blue Hall

First Author: M.Attia Ali Ahmed EGYPT
Co Author(s):                  

Abstract Details


to assess the effect of past glaucomatous attack on the IOL power calculation and post-operative refraction using the predictive errors.


Department of Ophthalmology, Faculty of Medicine, Minia University, Minia, Egypt


We included 18 eyes of 15 patients (3 males and 15 females) with their ages 75.11 ± 8.6 had phaco-emulsification with intraocular lens implantation procedure after past glaucomatous attack after medical control. Target refraction and keratometric readings were calculated by (IOL Master, Zeiss) using the axial length of the diseased eye (with previous glaucoma attack) as control group. the predictive errors (difference between the target and post-op. actual refraction as spherical equivalent) were calculated and compared using Wilcoxon signed-rank test (both raw and absolute data), also comparing proportion of cases within 0.5 and 1.0D using Fisher Exact test.


The predictive errors for the same eye group was 0.29 ± 0.52D and from the contra-lateral eye group 0.25 ± 0.46D, we found no statistical significance between both groups, P-value 0.60 (Wilcoxon signed-rank test). The absolute predictive error was for the same eye group 0.43 ± 0.41D and 0.39 ±0.35D for the contra-lateral eye group which was also statistically non-significant , P-value 0.39 (Wilcoxon signed-rank test). The percentage of cases within 1.0D was 83.3% for the same eye group and 100% for the contra-lateral eye with P-value 0.22 (Fisher Exact test).


Our before-mentioned results suggest that calculating the IOL power in eyes after glaucoma attack using the K-readings from the contralateral eye may have lower predictive error and so better post-operative refraction.

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