Chromatic thresholds were measured using the Cambridge Colour Test (CCT), the Colour Assessment and Diagnosis (CAD) test, and the Cone Specific Contrast Test (CSCT) at ground and 3780 m (12 400 ft) for subjects with normal color vision and red-green color vision defects. The CAD revealed a small ($\sim 10\%$) increase in the red-green thresholds for the trichromatic subjects and a similar increase in the blue-yellow thresholds for the dichromats. The other two color vision tests did not reveal any significant change in chromatic thresholds. The CAD results for the trichromats were consistent with a rotation of the discrimination ellipse counterclockwise with little change in the elliptical area. This alteration in the color discrimination ellipse can occur when retinal illumination is lowered.

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Related Journal Articles

• Relational color constancy in achromatic and isoluminant images (JOSAA)
• Chromatic contrast sensitivity: the role of absolute threshold and gain constant in differences between the fovea and the periphery (JOSAA)
• Role of perceptual organization in chromatic induction (JOSAA)
• Surround articulation. I. Brightness judgments (JOSAA)
• Surround articulation. II. Lightness judgments (JOSAA)

Related Conference Papers

• Fiber Optic Full Color Synthesizer
• Comparison of Farnsworth and Kinnear method of plotting the Farnsworth Munsell 100-Hue test scores
• Evaluation of two color filters used to simulate congenital color deficiency.
• Speckle Reduction in Wave-Front Sensing
• Numerical Simulations of the Chromatic Aberration and the Chromatic Optical Performance of Pseudophakic Eyes