how to scientists know how a dog sees black and white?

Question

how is it possible for someone to find out how a dog sees. do they switch eyeballs or something.do you know of any sites that would explain

i want proof, like a website. not just an opinion

Answer 1

They can tell by studying the types of cells on the dog's retina. Dog's fewer color-sensitive cone cells than humans, and only two types, rather than three. They lack red-sensitive cone cells. The color sensitivity of the cone cell can be deduced from the color-sensitive pigment it contains. So they don't see strictly in black and white, but their color sense is limited.

As far as what things actually look like to a dog, we can make assumptions based on how things would look to us if our eyes functioned like theirs. But part of vision is processing in the brain, and that part we can't tell a lot about.

Answer 2

Their vision approximates that of a human with red-green color blindness, see the reference. The spectral response of their cone cells can be measured. From there, it's a matter of analysis to figure out what they can discern.

Answer 3

Rods and cones are the structures in the eye that allow you to see. Cones (I think) are the part that allow you to see color. Dogs have no cones. Therefore, dogs cannot see in color.

I am remembering this from a long, long time ago, but I do believe this is correct.