Successive Color Contrast in Defective Color Vision

Measurement of Color Defective and Normal Color Vision Subjects’ Color and Luminance Contrast Threshold Functions on Crt

To perform a more complete diagnosis on the effect of color vision deficiency on visual performance we measured luminance and color contrast threshold functions. Measurements were carried out on CRT for a range of spatial frequencies on color deficient and normal color vision individuals. Luminance and color contrast threshold is a measure of the recognition limits of low luminance and color co...

Defective color vision and its inheritance.

We owe the first accurate description of color blindness to the chemist John Dalton, who in 1798 characterized his own condition in the words 'persons in general distinguish six kinds of colour in the solar image; namely, red, orange, yellow, green, blue, and purple.... To me it is quite otherwise:-I see only two, or at most three, distinctions. These I should call yellow and blue; or yellow, b...

Diagnostic Tests of Color Defective Vision

Achromatic parvocellular contrast gain in normal and color defective observers: Implications for the evolution of color vision.

The PC pathway conveys both chromatic and achromatic information, with PC neurons being more responsive to chromatic (L-M) than to achromatic (L+M) stimuli. In considering the evolution of color vision, it has been suggested that the dynamic range of chromatic PC-pathway processing is tuned to the chromatic content of the natural environment. Anomalous trichromats, with reduced separation of th...

Color-Vision and Color-Blindness

Special public attention was called to the subject in 1875 by an enquiry into the causes of a railway accident which had taken place in Sweden, from which it appears that colourblindness was the cause of the disaster. Our author having described colour-sensations, goes on to discuss the theories of colour-perception and colour-blindness, classifying the latter defect as total and partial. Total...