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Abstract #15409 Published in IGR 1-3
Testing for glaucoma with the spatial frequency doubling illusion
Maddess T; Goldberg I; Dobinson J; Wine S; Welsh AH; James ACVision Research 1999; 39: 4258-4273
The authors examined the performance of tests for glaucoma based on the spatial frequency doubling (FD) illusion. Contrast thresholds for seeing the FD illusion in four large visual field regions were measured from 340 subjects who were tested up to seven times over two years. Median sensitivities of 91% at specificities of 95% were obtained. Test-retest variability for the worst hemifield thresholds averaged 2.22 dB±0.09 S.E. for all tested groups, and significant progression was observed for glaucoma suspects over the seven visits, indicating that tests based on the FD illusion can detect diffuse early glaucomatous loss.
Dr. T. Maddess, Centre for Visual Sciences, Research School of Biological Science, Australian National University, GPO Box 475, Canberra, ACT 2601; Australia
Classification:
6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
