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Abstract #9080 Published in IGR 5-2
Comparison of localised nerve fibre layer defects in normal tension glaucoma and primary open angle glaucoma
Woo SJ; Park KH; Kim DMBritish Journal of Ophthalmology 2003; 87: 695-698
AIM: To compare the pattern of localized nerve fiber layer (NFL) defects in normal-tension glaucoma (NTG) and primary open-angle glaucoma (POAG). METHODS: Fifty NTG eyes and 36 POAG eyes, all with localized NFL defects, were enrolled. On retinal NFL photography, the proximity of the defect to the center of the fovea (angle alpha) and the sum of the angular width of the defects (angle beta) were determined. Angle alpha was the angle made by a line from the center of the fovea to the disc center and a line from the disc center to the disc margin, where the nearest border of the defect met. The patterns of localized NFL defects in NTG and POAG were compared with angles alpha and beta. Independent t test was used for statistical analysis. RESULTS: Angle alpha in NTG (35.1 (SD 20.0) degrees) was significantly smaller than that of POAG (45.9 (21.9) degrees ) (p = 0.02), while angle beta in NTG (49.0 (31.9) degrees) was significantly larger than that of POAG (33.1 (23.9) degrees) (p = 0.01). CONCLUSIONS: The pattern of NFL defects in NTG was different from that in POAG. Localized NFL defects in NTG were closer to the fovea and wider in width than those in POAG.
Dr. S.J. Woo, Department of Ophthalmology, Seoul National University Hospital, Seoul, Korea
Classification:
2.13 Retina and retinal nerve fibre layer (Part of: 2 Anatomical structures in glaucoma)
6.8.2 Posterior segment (Part of: 6 Clinical examination methods > 6.8 Photography)
9.2.4 Normal pressure glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)