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

Authors
  • Knight, R
  • Buck, S L
  • Fowler, G A
  • Nguyen, A
Type
Published Article
Journal
Vision Research
Publisher
Elsevier
Publication Date
Nov 01, 1998
Volume
38
Issue
21
Pages
3477–3481
Identifiers
PMID: 9893868
Source
Medline
License
Unknown

Abstract

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.

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