Comparison of central visual sensitivity between monocular and binocular testing in advanced glaucoma patients using imo perimetry

AI Generated Summary*

Central sensitivity under monocular and binocular viewing was compared in 51 open-angle glaucoma patients with parafoveal scotoma, using a head-mounted perimeter (imo) that tests either eye without occlusion. Five points within the central 5 degrees were thresholded monocularly, in a binocular random single-eye mode, and with both eyes stimulated at once. Better and worse eyes were classified by Humphrey foveal sensitivity, acuity and patient report; median 24-2 mean deviation was -5.5 dB versus -18.0 dB. Binocular random single-eye testing gave significantly higher sensitivity in better eyes and lower sensitivity in worse eyes than monocular testing (p<0.05); the simultaneous both-eye test yielded the highest values overall. Monocular results may therefore understate better-eye and overstate worse-eye function, per the investigators.

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