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Related Experiment Videos

Cat colour vision: evidence for more than one cone process.

N W Daw, A L Pearlman

    The Journal of Physiology
    |November 1, 1970
    PubMed
    Summary

    Cats can distinguish colors, suggesting they possess more than one type of cone. This research challenges the idea that cats rely solely on rods and a single cone type for color discrimination.

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    Area of Science:

    • Vision science
    • Animal color perception

    Background:

    • The hypothesis that cats discriminate wavelength using rods and a single cone type was investigated.
    • Previous understanding of feline color vision was limited.

    Purpose of the Study:

    • To test the hypothesis of feline color discrimination using rods and a single cone type.
    • To investigate the capabilities of cat color vision at different light levels.

    Main Methods:

    • Cats were trained to differentiate between red and cyan, and orange and cyan stimuli.
    • Discrimination tests were conducted at mesopic (low light) and photopic (bright light) levels.
    • Behavioral tests were performed after rod saturation using a bright white light exposure.

    Main Results:

    • Cats successfully discriminated colors at mesopic levels.
    • Color discrimination ability was retained even when rods were saturated.
    • Neural recordings revealed opponent color units with input from distinct cone types.

    Conclusions:

    • The findings suggest cats possess more than one type of cone, indicating a more complex color vision system.
    • The presence of opponent color units supports the existence of multiple cone types in feline vision.

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