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Abstract #8917 Published in IGR 5-2
Patterns of glaucomatous visual field defects in an older population: the Blue Mountains Eye Study
Lee AJ; Wang JJ; Rochtchina E; Healey P; Chia EM; Mitchell PClinical and Experimental Ophthalmology 2003; 31: 331-335
This report aims to describe the frequency of different patterns of visual field loss in open-angle glaucoma (OAG). The Blue Mountains Eye Study examined 3654 persons (aged 49+) during 1992-1994. Humphrey supra-threshold visual fields were performed in 88.9%. Those classified as glaucoma suspects had 30-2 full-threshold fields (9.2%). Of OAG cases (n = 108) with field tests in both eyes (n = 97), unilateral defects were present in 49 (50.5%) and bilateral in 48 (49.5%). Advanced field loss was found in 16 (15.4%) subjects and in 22 (10.9%) eyes, with bilateral loss present in six (6.2%) cases. Of all eyes of OAG cases (n = 201), 49 (24.4%) had no defects, 52 (25.9%) upper, 61 (30.3%) lower, and 17 (8.5%) had combined upper and lower loss. Of the upper and lower cases (n = 113), the types of defects included nasal step (36), arcuate (26), nasal plus arcuate (26), and hemispherical defects (25). Of subjects with fields in at least one eye (n = 104), there was a similar proportion in the worse eye of upper defects (28.8%), lower (31.7%), and combined upper and lower (24.0%). Undiagnosed OAG was more frequent in unilateral (65.3%) than bilateral (34.7%) cases (p = 0.003). This study reports the pattern of typical glaucomatous field loss in an older Australian population.
Classification:
1.6 Prevention and screening (Part of: 1 General aspects)
6.6 Visual field examination and other visual function tests (Part of: 6 Clinical examination methods)