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Performance of a Rapid Rarebit Central-Vision Test with Optic Neuropathies

Journal article
Authors Lars Frisén
Published in Optometry and Vision Science
Volume 89
Issue 8
Pages 1192-1195
ISSN 1040-5488
Publication year 2012
Published at Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation
Pages 1192-1195
Language en
Keywords vision test, rarebit, visual acuity, optic nerve, chiasm, pass resolution perimetry, visual-acuity, spatial vision, ganglion-cells, glaucoma, atrophy, eyes
Subject categories Ophthalmology


Purpose. Rarebit vision tests probe for gaps in the neuro-retinal receptive field matrix, using bright micro dots on a dark background. Previous reports have found central-vision rarebit tests useful for macular lesions. Their performance with lesions of the anterior visual pathways has not been explored. Methods. Twenty-two subjects with optic nerve lesions of light to moderate severities were examined with a novel, self-contained rarebit test. Outcomes were contrasted with results of high-pass resolution perimetry and a threshold letter acuity test. Results. The results of the three tests differed significantly from those of normal control subjects. There were no meaningful inter-test correlations. Analysis of receiver-operating characteristic curves revealed closely similar powers of discrimination. Mean test time for the rarebit test was 1: 42 min, and for the other tests, it was approximately 5 min each. Conclusions. The rarebit test appeared highly capable of detecting optic neuropathies and chiasmal lesions. Its simplicity and short test duration indicate a useful role in screening settings. (Optom Vis Sci 2012; 89:1192-1195)

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