Orientation of the temporal nerve fiber raphe in healthy and in glaucomatous eyes

Abstract

PURPOSE. To determine the normal variation in orientation of the temporal nerve fiber raphe, and the accuracy with which it may be predicted or approximated in lieu of direct measurement. METHODS. We previously described an algorithm for automatic measurement of raphe orientation from optical coherence tomography, using the intensity of vertically oriented macular cubes. Here this method was applied in 49 healthy participants (age 19–81 years) and 51 participants with primary open angle glaucoma (age 51–80 years). RESULTS. Mean fovea-disc-raphe angle was 173.5º ± 3.2º (range = 1668–1828) and 174.2º ± 3.4º (range = 166º–184º) in healthy and glaucoma patients, respectively. Differences between..