What do you know about color blindness?

That depends on the type of color blindness. There are three basic variants of color blindness.

Red/green color blindness is the most common. The affected person cannot differentiate between red and green.

Blue color blindness is an inability to distinguish both blue and yellow, which are seen as white or gray. It is quite rare.

A total inability to distinguish colors is exceedingly rare. These affected individuals view the world in shades of gray. They frequently have poor visual acuity and are extremely sensitive to light, which causes them to squint in ordinary light.

it is different for different people

according to the trichromatic theory, color information is processed in the brain by comparing the relative activations of three different types of cone receptors in the retina. these three types of cone receptors are either sensitive to blue, responding best to short wavelengths of light, green, responding best to medium wavelengths, or red, responding best to long wavelengths. when colorblind, one or more of a person's cone receptors may be "filled" with the wrong photopigment color. this leaves less functional cone receptors. therefore, dichromats (people left with only two types of cone receptors) are incapable of distinguishing between some or all colors, depending on which cone receptors are lost. for instance, if the green cone receptor is accidentally "filled" with blue pigment then the ability to see green is lost. that person would only be able to blue and red and their derivatives. so, the colors a colorblind person can see all depends on which cone receptor color(s) are missing.

I am colour-blind because i can't see the colour green, but it doesn't show a diffrent colour, it hurts my eyes it is a blur. but i can still see it but not very effectively. I can see all the other colours but just not Green.

I hope this has answered your question

Well They Can See Black nd Only Black Because My Uncle Is Blind And I Asked Him One Day And He Said He Could Only Se Like Black When You Close Your Eyes Soo There You Go :-)

If you are color blind to all colors, your vision will be in black and white, (the colors you will see are black in the range from black to white). If you are only to a certain color, that certain color will be seen in black or white, depending on the shade. Hope it helps! :-)

There are two types of color blindness. The one I know about, is red-green. Its where they tend to flip these colors. People who are color blind don't technically see only black and white, they just confuse most or all their colors.

if your color blind there are few colors you can see. Some people can't see dark others light, It depends on what you can and can't see. I have a friend and he can't see fluorescent colors. some may only see grey , black and white. Some may see blue and green

Contrary to popular belief, only a rare percentage colorblind people can only see in black and white. More commonly, colorblind people difficulty telling two colors apart, or being able to identify what color an object is. Colorblind people don't see anything "wrong", their perception of color is just slightly different. Only in a minority of colorblind people is colorblindness a major disability.

I hope this will help you little bit to understand.

To use your example of matching the color red, a person "blind" to that color would see "red" in shades of gray. If you can see red normally, you are aware that that color comes in many shades and degrees of saturation. These subtle variations are often difficult to discriminate for a person who simply sees red as shades of gray. The picture (excuse the pun) becomes more complicated when you realize that one is not blind to only one color. There are generally three kinds of color blindness. The most common is red/green blindness, then blue/yellow, and most rare is complete color blindness as if one were viewing the world as a black and white movie.

Boring funny story alert! I have a friend whose father, a psychiatrist, was red/green blind. One day, the good doctor took a notion to buy a nifty little MG sports car...a red one, of course. Aren't all nifty little sports cars supposed to be red? A few weeks later, when I went over to hang out with my friend, I noticed an MG in the driveway except that is was a silver-gray color. I asked my friend's Dad if he had gotten another car and he said, smiling, "No, I just had the old one repainted. That's how I see it anyway."

Oh, the story gets even better -- The doctor and his two sons ALL have RED hair! :o)

http://moritzbiopd4.wikispaces.com/file/view/colou...

This image is a series of circles containing numbers. If a person can not or struggles to identify these numbers it is likely they are colour blind.

Someone with colour blindness will be able to link colours that are the same, take your example for instance red and red would be identified as the same colour but they may consider a colour such as pink to be in the same grouping as the two red items.

What i understand about color blindness is they can't see certain hues against certain backgrounds. Like green, orange or yellow on a white board-but could see those colors against a black board. My son had that issue-but out grew it in his late teens. That's all I know.