versão impressa ISSN 0004-2749versão On-line ISSN 1678-2925
Arq. Bras. Oftalmol. vol.62 no.3 São Paulo jun. 1999
To study the variations of anterior chambe . (AC) structures in eyes with shallow anterior chamber and occludable AC angle, prior to and after laser iridectomy. The results of dark-room provocative test are reported.
Ultrasound biomicroscopy was performed in 25 eyes (17 patients). Central and peripheral scans were performed to permit measurements of AC depth, AC angle, iris thickness and iris-lens contact length, pre and post-YAG laser iridectomy.
The provocative test decreased AC angle opening (from 11.42 ± 4.8° to 1.75 ± 2.0° (p < 0.05) and central AC depth (from 1.820 ± 0.2 mm to 1.770 ± 0.2 mm (p < 0.05), prior to laser iridectomy. After iridectomy, the provocative test decreased AC angle opening (from 17.93 ± 2.5° to 12.03 ± 2.8° (p < 0.05) and central AC depth (from 1.860 ± 0.2 mm to 1.830 ±0.2 mm (p < 0.05). Iris thickness and iris-lens contact length were considered nonstatistically significant parameters.
1. The provocative test decreased AC angle opening and central AC depth, prior to and after laser iridectomy. However, after iridectomy there was no angle occlusion; 2. Results were more significant in the eyes with a positive response to the provocative test, justifying their greater susceptibility to acute angle-closure glaucoma.
Keywords: Ultrasound biomicroscopy; Angle-closure glaucoma; Laser iridectomy