Rods affect S-cone discrimination on the Farnsworth–Munsell 100-hue test

Rod influence on hue discrimination was assessed by the Farnsworth–Munsell 100-hue test. Rod influence was taken as the difference in error scores obtained after complete dark adaptation and during the cone plateau at three mesopic (23, 9, 3 td) and one standard (158 td) light level. On the FM 100,...

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Bibliographic Details
Published in:Vision research (Oxford) 1998-11, Vol.38 (21), p.3477-3481
Main Authors: Knight, Roger, Buck, Steven L, Fowler, Garth A, Nguyen, Anh
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Chromatic discrimination
Color Perception Tests - methods
Dark Adaptation
Differential Threshold - physiology
Farnsworth–Munsell
Fourier Analysis
Hue
Humans
Investigative techniques of ocular function and vision
Investigative techniques, diagnostic techniques (general aspects)
Medical sciences
Retinal Cone Photoreceptor Cells - physiology
Retinal Rod Photoreceptor Cells - physiology
Rod-cone interaction
S cones
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Summary:Rod influence on hue discrimination was assessed by the Farnsworth–Munsell 100-hue test. Rod influence was taken as the difference in error scores obtained after complete dark adaptation and during the cone plateau at three mesopic (23, 9, 3 td) and one standard (158 td) light level. On the FM 100, rods produced a differential discrimination loss along a tritan axis as compared with a red–green axis without any bias toward a rod confusion axis. Rods appear to impair discrimination mediated by S-cone pathways, which at moderate levels of illumination can differentially elevate tritan errors on the FM 100.
ISSN:0042-6989
1878-5646
DOI:10.1016/S0042-6989(97)00414-8