[Measurement of regional neuroretinal rim area in early open angle glaucoma]

The mean total and regional neuroretinal rim areas (NRA) in early primary open angle glaucoma were found significantly reduced in comparison with those of normal controls, and in 10 glaucomatous eyes whose total NRAs were within the normal range, the suprotemporal regional NRA was less than the mean normal value, indicating that the measurement of regional NRA was more sensitive for the detection of early glaucoma.