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Research Note: Canine Vision & Color Blindness


March 2018

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To test the hypothesis that canine vision is dichromatic in nature and resembles that of human red–green color blindness, researchers used a modified version of a human color blindness test (Ishihara test) to evaluate an orienting response (ie, movements of the eyes, head, and body) to movements of a colored target in the dog’s visual field. Results of this study support the hypothesis, providing a direct comparison with color vision in humans and potentially opening the door for the development of new techniques to assess color vision in animals.


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