can people who can't see color, can they see in the dark?

Question

Dogs and cats can see in the dark and they can see in the dark. So can people who are "colored bind" can they? Why do they say they are color blind when they can still see its just not all the colors others who see all the colors do. Also does evey who sees color do we all see the same color or does it vary with every one.

Answer 1

There are two types of light sensitive cells inside the eye, rod cells and cone cells. The rod cells are about 100 times more sensitive to light than the cone cells, but they only report the presence of light, not its color. There exist at least 4 types of cones, each more sensitive to a particular color, but humans usually have only three types, cones sensitive to the three primary colors: red, blue and green. With the combination of these three, the brain can assemble all the colors that we can distinguish. Some people have insufficient cone cells of a particular type and can therefore not distinguish as many colors as others. those people we call color blind, although they usually still see colors, only less.

When there is very little light the cone cells' sensitivity is no longer sufficient to see all, and the darker it gets, the more the brain relies on information from the much more sensitive rod cells. So the darker it gets, the less colors we see. This means that in (relative) darkness, like moonlight, it does no longer matter if you're color blind or not, both see about as much.

Dogs and cats have less cones and therefore more (room for) rods. But people who are color blind have dysfunctional or damaged cones. So: no extra (room for) rod cells.

When it is totally dark there is no light left that can hit the eye at all so there is no animal that can see in complete darkness.

I see no way how the second question can be answered. It's subjective.

Answer 2

People who say that they are color blind many times either they really do not see any color or they just do not see a range of colors or confuse between certain colors. Anyway not because you are color blind it means that you do not see in the dark. Dark is not a color thus they see the things like you see them in the dark. Even a normal person does not see colors in dark.

Answer 3

The eye has two types of receptors, cones and rods. Cones are used to see color and rods black and white. A color blind person should be able to see light and shadow at night. Unless the have a form on night blindness. Color blindness can be specific to certain colors or there can even be a for of total color blindness. There are simple test that you can take to determine which one a person has. The test consist of colored numbers or letters surrounded in other colors. If you cannot see them them you are blind to that specific color. During WWII they used colorblind spotters in reconnaissance airplane to look for variations in vegetation to determine camouflaged units and equipment. They were not distracted by the basic colors etc...Most animals are color blind. That is why if you ever see them on display they might use red light to illuminate the cages. It WWII appear as if it was night to them.
Cats are tuned into movement more than anything else. That is why they like to attack wiggling things.

Answer 4

a) Of course they can. In fact, they have better nightvision than most people. They have no cones in their eyes (the parts used in normal daylight that see color), so they have an abundance of rods (used in low-light conditions but no color vision). No one can see color in the dark, so colorblind people are more adapted to nightvision.
b) That's debatable. I could point at a tree and say that a leaf is green, and so would you, but it's possible that you're seeing what I call orange. I don't know of any way to verify this, so I can't answer your question one way or the other.

Answer 5

Yes people who are color blind or blind to color does see black and gray. They also see you like you would see your own shadow. This of course is unless they are totally blind. Then they can't see anything at all. Everyone basically see's the same color but they describe the color as a different color than others Example : orange-peach. pink-red, green- blue" etc.

Answer 6

Most "color blind" people are actually color deficient. They do not see *as many* colors. Dark vision is the same. Most color blind people see colors the same way other color blind people do, but there are different kinds of colorblindness, including a rare inherited type where the victim sees only one color.

Vischeck is supposed to help you see what "colorblind" people see.

Answer 7

Cats and dogs can't see in complete darkness, but their eyes are more sensitive in low light. I don't think it necessarily follows that color blind humans are able to see better in low light conditions.

I think that true color blindness in humans is rare. Most are unable to distinguish between red and green. There is also a rarer blue yellow color blindness.

I've often wondered the same thing, whether others perceive color, and other senses the same. Since I can't occupy another person's body and experience their perception, it's hard to tell.

Answer 8

People that are colorblind can not see any better in the dark than people who are not colorblind. The reason some animals can see better in the dark is because they have a more reflective choroid coat which allows them to see the minimal light there is, better.
And I guess we never will know if what I see is brown you see is red but we both think it is brown weird huh? we could all see different things but all think it is the same thing I spose.

Answer 9

as long as you are not blind you can see in the dark there are 2 parts of the rods and cones I forget which is for which but one is for the preception of color and the other is to differentiate light from the lack thereof... and colors are precieved by different types of those preceptors red - green and there is also blue yellow color blindness thoe far less common...

Answer 10

It's the interesting question, in my opinion, they can see the light in the dark, but the light is only the white color