advertisement
Abstract #19021 Published in IGR 3-1
Correlation between anterior lens curvature and primary angle-closure glaucoma
Jian J-H; Kuo H-C; Yang Y-C; Woung L-CJournal of Medical Ultrasound 2000; 8: 161-167
BACKGROUND: The authors observed that the curvature of the anterior lens surface under slit-lamp examination seemed to be steeper in the eyes of patients with primary angle-closure glaucoma (PACG) than in primary open-angle glaucoma (POAG) patients. In order to confirm this suspicion, the relationship between the radius of curvature of the anterior lens surface and glaucoma was studied. MATERIAL AND METHODS: The authors pooled data on 140 eyes of patients from their clinics. The patients were divided into four groups: elderly normal, PACG, elderly POAG, and young POAG. Digital analysis of the anterior eye segment image was used to measure the radius of curvature of the anterior lens surface, anterior chamber (AC) depth, AC angles and pupil size. RESULTS: The radius of curvature of the anterior lens surface in the PACG group (mean 8.8 mm) was significantly smaller than in the other three groups (10.5-11.8 mm). There were negative correlations between age and the anterior lens surface radius, AC depth, AC angles and pupil size. A positive correlation was found between the anterior lens surface radius and AC depth. CONCLUSIONS: A smaller radius of curvature of the anterior lens surface is an important risk factor for PACG because the iris can adhere more easily to the anterior lens surface.
Dr J.-H. Jian, Department of Ophthalmology, Taipei Municipal Yang-Ming Hospital, 105 Yu-Sheng St, Shih-Lin 111, Taipei, Taiwan
Classification:
6.12 Ultrasonography and ultrasound biomicroscopy (Part of: 6 Clinical examination methods)
