Psychology Facts

▲ Colorblindness ▲

Fun fact I'm actually 'colorblind' with pinks!

》Color blindness occurs when certain light-sensitive nerve cells in your eye do not respond to light triggers as normal, so the brain does not interpret these signals as a specific color.

》There are two basic types of cells in your retina that detect light: rods and cones.
Cones are the cells that comprehend color.
Rods interpret light and dark, and they tend to work better in low light or at night.

》99% of all colorblind people are not really color blind but color deficient; the term color blindness is misleading.

》The most common type of color blindness makes it hard to tell the difference between red and green.

》The second most common type makes it hard to tell the difference between blue and yellow

》People who are completely color blind don't see color at all, but that's not very common.

》The main symptom of color blindness is not seeing colors the way most people do. If you're color blind, you may have trouble seeing:

The difference between colors

How bright colors are

Different shades of colors

》To a color blind person, the green light on a stoplight may appear white or even blue, while the red and yellow lights may look similar to each other.

》Men have a much higher risk than women for color blindness. You're also more likely to have color blindness if you -

Have a family history of color blindness

Have certain eye diseases, like glaucoma or age-related macular degeneration (AMD)

Have certain health problems, like diabetes, Alzheimer's disease, or multiple sclerosis (MS)

Take certain medicines

Are white

》Red-green color vision deficiency

The most common type of color vision deficiency makes it hard to tell the difference between red and green.
There are 4 types of red-green color vision deficiency:

Deuteranomaly: is the most common type of red-green color vision deficiency. It makes certain shades of green look more red. This type is mild and doesn't usually get in the way of normal activities.

Protanomaly: makes certain shades of red look more green and less bright. This type is mild and usually doesn't get in the way of normal activities.

Protanopia and deuteranopia: both make someone unable to tell the difference between red and green at all.

》Blue-yellow color vision deficiency

This less-common type of color vision deficiency makes it hard to tell the difference between several different color combinations.

There are 2 types of blue-yellow color vision deficiency:

Tritanomaly: makes it hard to tell the difference between blue and green and between yellow and red.

Tritanopia: makes someone unable to tell the difference between blue and green, purple and red, and yellow and pink. It also makes colors look less bright.

》Complete color vision deficiency

If you have complete color vision deficiency, you can't see colors at all. This is also called monochromacy or achromatopsia, and it's rare. Depending on the type, you may also have trouble seeing clearly, and you may be more sensitive to light.

》 If a woman is red-green colorblind, all her sons will also be colorblind.

》 A father can't pass his red-green color blindness on to his sons.

》All babies are color blind when they are born. Babies start to see colors within 7 days of birth and fully develop the color vision by the time they turn six months old.

》There is no known cure or treatment for color blindness, nor is there a preventive measure that you can take as it is an inherited disease.

》Not a lot of people, but some, suffer from a rare form of color blindness called unilateral dichromacy which means they have one normal seeing eye, and one color blind eye.

》 The Ishihara color blind test was invented by Dr. Shinobu Ishihara in 1916 while he held a military position in the Japanese Army.

》People who suffer from red green color blindness have a difficult time determining if their meat is cooked enough. Without being able to see different shades of red, it is hard to tell.

》1 in 12 men is color blind while only 1 in 200 women have the condition.

》John Dalton, a scientist, wrote the first paper on color blindness in 1794. He believed his own color blindness was caused by a discoloration in his aqueous humor

》Contrary to popular belief, dogs don't actually see in black and white. They are dichromats, which means they have two types of cone cells, and see in mostly blue and yellow

》In some countries, there are barriers to entry in certain professions for people who are color blind. In England, color blindness may prevent you from becoming a doctor; in the US one cannot get a pilot's license; and in many parts of the world, it's difficult to become an electrician.

》In Romania, people who are color blind are not allowed to obtain a driver's license.

》To the normally sighted person, a rainbow features all the colors of the rainbow. For many color blind people, however, a rainbow only appears to have 2 or 3 colors: blue and yellow.

》People who are red-green color blind are often surprised to find out that peanut butter is NOT green!

》Celebrities That Are Color Blind -

Mark Zuckerberg

Keanu Reeves

Niall Horan

Eddie Redmayne

Christopher Nolan

Sting

Howie Mandel

Mark Twain

Fred Rogers

》EnChroma color blind glasses were invented by EnChroma co-founder, Don McPherson, while working as a glass scientist on laser glasses designed for surgeons. Learn how EnChroma glasses work. The color blindness aiding properties of the glasses were accidentally discovered during an ultimate frisbee game.