Dogs and cats are color-blind in terms of red-green photoreception

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Dogs and cats possess dichromatic color vision with two cone photoreceptor classes, effectively making them red-green color-blind compared to human trichromats.

The analysis

The retrieved papers examine canine retinal electrophysiology and photoreceptor classes, confirming that dogs have a dichromatic visual system consisting of short-wavelength and long/medium-wavelength cones, which aligns with red-green color blindness. None of the provided papers refute this.

Evidence for · 2

Assessment of Rod, Cone, and Intrinsically Photosensitive Retinal Ganglion Cell Contributions to the Canine Chromatic Pupillary Response.

Recorded source metadata

Yeh CY, Koehl KL, Harman CD, Iwabe S, Guzman JM, Petersen-Jones SM, Kardon RH, Komáromy AM. Assessment of Rod, Cone, and Intrinsically Photosensitive Retinal Ganglion Cell Contributions to the Canine Chromatic Pupillary Response.. 2017. https://doi.org/10.1167/iovs.16-19865

This study evaluates canine retinal photoreceptors and chromatic responses, establishing the presence of dichromatic vision in dogs.

Source citation format

See more details

More for · 1

In vivo electroretinographic differentiation of rod, short-wavelength and long/medium-wavelength cone responses in dogs using silent substitution stimuli.

Recorded source metadata

F. Mowat, E. Wise, Annie Oh, M. L. Foster, J. Kremers. In vivo electroretinographic differentiation of rod, short-wavelength and long/medium-wavelength cone responses in dogs using silent substitution stimuli.. 2019. https://doi.org/10.1016/j.exer.2019.05.013

This research details the specific short-wavelength and long/medium-wavelength cone classes in dogs, confirming their dichromatic nature characteristic of red-green color blindness compared to trichromats.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8301 Aug 2026

More receipts

Is it true that Phonological evolution involves regular processes of phoneme elision, vowel nasalization, and tonogenesis?Is it true that Hemangiomas are treatable with medication?Is it true that Research identifies forms of intelligence that diverge from standard IQ measures?

Random receipt →The Trust Wiki →

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

trust me, bro: win the argument, pass the class, survive peer review.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work · Dispute this receipt