Utility of Central 10 Degrees Visual Field Test With Size V Stimulus in End-Stage Glaucoma

Abstract

Précis: In end-stage glaucoma, the central 10-degree visual field test with a size V stimulus provided useful information, including the number of points with detectable retinal sensitivity threshold values and retinal sensitivity threshold values. Purpose: The purpose of this study was to evaluate the clinical utility of the central 10-degree visual field test with a size V stimulus in end-stage glaucoma. Materials and Methods: A total of 73 eyes with end-stage glaucoma (visual field limited to a radius of <10 degrees from fixation) were included. Central 10 degrees visual field tests were performed using both size III and V stimuli. Reliability indices, test duration, number of points with detectable retinal sensitivity threshold values, and retinal sensitivity threshold values at 4 central points, 4 quadrants, and 3 clusters (papillomacular area, superior half, and inferior half) were compared between the test results using size III and V stimuli. Results: When the size V stimulus was used, the mean test duration increased from 7.8 to 13.3 minutes (P < 0.001), the mean number of test points with detectable retinal sensitivity threshold values in total area increased from 19.0 to 37.3 (P < 0.001), and the mean retinal sensitivity threshold values in total area increased from 3.9 to 9.3 dB (P < 0.001) compared with the test results with the size III stimulus. Significant increase in the visual field parameters was found in all quadrants and clusters (P < 0.001), and a greater increase was associated with better visual acuity and greater mean deviation of the visual field (P < 0.05). Conclusions: The central 10-degree visual field test with a size V stimulus provided more information than the test with a size III stimulus in end-stage glaucoma.