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Updated: Aug 10, 2026

Training Synesthetic Letter-color Associations by Reading in Color
Published on: February 20, 2014
Colour but not form patterns combine between the eyes
1Department of Biomedical Sciences, University of Sydney, New South Wales, Australia.
Purpose:
A visual pattern was broken into patches, some of which were shown to one eye and the remainder of which were shown to the other eye. Our aim was to find the conditions under which the subject could combine the information given to the two eyes separately to reconstruct the original pattern.
Methods:
One green and four red patches were presented to one eye. Five patches were presented to the other eye at corresponding locations but with red substituted for green and green for red.
Results:
When the chromatic contrasts were appropriately adjusted, subjects saw five patches of a single colour for most of the viewing time. Intermixed horizontal and vertical gratings did not separate into coherent percepts in the same way.
Conclusions:
This result indicates cooperation between the responses to colour patches presented to different eyes, a finding that may be of use in testing for normal binocular vision.
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