Dichromatic color vision at high light levels: red/green discrimination using the blue-sensitive mechanism.

Abstract:

:Three red/green blind observers (dichromats) performed a wavelength discrimination task over a wide range of intensity levels. As expected, discrimination failed in the entire red/green spectral range at the low intensities typically used in wavelength discrimination experiments, but at very high intensities (at or above 10,000 td) discrimination was well maintained into the red/green range. The following experiments demonstrate that dichromats are able to utilize signals from the blue-sensitive cones (S-cones) to mediate color discrimination throughout the spectrum at high intensities, and they provide an estimate of S-cone sensitivity throughout the visible spectrum.

journal_name

Vision Res

journal_title

Vision research

authors

McMahon MJ,MacLeod DI

doi

10.1016/s0042-6989(97)00280-0

subject

Has Abstract

pub_date

1998-04-01 00:00:00

pages

973-83

issue

7

eissn

0042-6989

issn

1878-5646

pii

S0042-6989(97)00280-0

journal_volume

38

pub_type

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