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D. T. Quek, M. Baskaran, S. A. Perera, T. A. Tun, R. S. Kumar, T. Aung; Demonstration of Angle Widening Using EyeCamTM After Laser Peripheral Iridotomy in Eyes With Primary Angle Closure. Invest. Ophthalmol. Vis. Sci. 2009;50(13):3355.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate the use of EyeCamTM in detecting change in angle configuration after laser peripheral iridotomy (LPI) in eyes with primary angle closure.
In eyes with primary angle closure, imaging of the superior, inferior, nasal and temporal quadrants of the angle were performed using EyeCamTM, before and after LPI. Images were graded by an independent observer masked to clinical data and the status of LPI, and were performed in a random order. Angle closure was defined as the inability to visualize the posterior trabecular meshwork (TM) (Figure 1), and was quantified by the number of clock-hours that the TM was not visible. We determined the number of quadrants in each eye in which angles widened after LPI and the mean number of clock-hours of angle closure before and after LPI.
17 eyes of 17 subjects with primary angle closure were recruited. There were 16 Chinese and 1 Indian subjects, with a mean age of 60.3 years, and a male:female ratio of 7:10. Using EyeCamTM, all 17 eyes showed at least 1 quadrant of angle widening after LPI (Figure 2). 5 eyes had 3 or more quadrants of widening after LPI, 8 eyes had 2 quadrants and 4 eyes had 1 quadrant of angle widening after LPI. The mean number of clock-hours of angle closure decreased significantly from 8.29±2.94 before LPI to 1.65±1.51 after LPI (p=0.0003, Wilcoxon signed-ranked test).
EyeCamTM may be used to assess changes in angle configuration after LPI in eyes with primary angle closure.
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