advertisement
Abstract #78530 Published in IGR 20-1
Low iris and anterior chamber volume is associated with deepening after laser peripheral iridotomy in primary angle closure suspects
Esfandiari H; Pakravan M; Amouhashemi N; Yaseri M; Torkian P; Jadidi K; Loewen NAGraefe's Archive for Clinical and Experimental Ophthalmology 2018; 256: 2173-2179
PURPOSE: To evaluate the association between baseline ocular variables and the widening of the anterior chamber angle by laser peripheral iridotomy (LPI) in primary angle closure suspects (PACS) using a new Fourier-domain swept-source anterior segment optical coherence tomography (FD-ASOCT). METHOD: Sixty-six PACS eyes of 41 individuals were enrolled in this prospective interventional case series. An FD-ASOCT (Casia SS-1000 OCT; Tomey, Nagoya, Japan) was used to measure biometric baseline variables and at 1 month after the LPI. Paired t test was used to compare the difference between pre-and post-LPI measurements. Multivariate regression analysis was used to test for an association between baseline iris thickness and volume, anterior chamber depth and volume, and lens vault with a widening of the angle after an LPI. Changes in trabecular iris space area and angle opening distance after the LPI were main outcome measures. RESULTS: The mean age of participants was 58.6 ± 8.7 years, 68.2% of whom were female. The angle opening distance, recess area, and trabecular iris surface area at 500 μm increased by 48 to 73% (all P < 0.001). Lens vault and iris volume did not change. A low anterior chamber volume and low iris volume were associated with angle greater deepening by LPI. CONCLUSION: Eyes with a shallow anterior chamber and thinner irises are more likely to experience angle opening from an LPI.
Full article
Classification:
12.2 Laser iridotomy (Part of: 12 Surgical treatment)
9.3.4 Primary angle closure suspect (Part of: 9 Clinical forms of glaucomas > 9.3 Primary angle closure glaucomas)