Abstract
Color properties of the contrast flash effect: Monoptic vs dichoptic comparisons
Highlights
The visibility of a brief flash of light can be greatly reduced if it is followed within a few msec by a second flash falling on an adjacent portion of the retina
Alpem and Rushton (1965) showed that when the test flash is being detected by a given color mechanism xi, contrast flashes of different colors produce identical threshold elevations if their intensities are adjusted to be equal according to the action spectrum for xi. (This had already been shown for the rod mechanism rro by Alpem, 1965)
1972; King-Smith and Webb, 1974), one can say that to be effective at raising threshold for a flash detected by, e.g. red cones, contrast flashes of different colors must be adjusted to produce an equal response in red cones-regardless of their effect on other receptor systems
Summary
The visibility of a brief flash of light can be greatly reduced if it is followed within a few msec by a second flash falling on an adjacent portion of the retina. 2A and B it can be seen that a steady background presented dichoptically at any intensity has essentially no effect on test flash threshold.
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