Learn More about
Color Blindness
Colour blindness affects approximately 1 in 12 men (8%) and 1 in 200 women in the world , this means that there are approximately 2.7 million colour blind people (about 4.5% of the entire population), most of whom are male.
There are different causes of colour blindness. For the vast majority of people with deficient colour vision the condition is genetic and has been inherited from their mother, although some people become colour blind as a result of other diseases such as diabetes and multiple sclerosis.
Most colour blind people are able to see things as clearly as other people but they unable to fully ‘see’ red, green or blue light. There are different types of colour blindness and there are extremely rare cases where people are unable to see any colour at all.
The most common form of colour blindness is known as red/green colour blindness and most colour blind people suffer from this. Although known as red/green colour blindness this does not mean sufferers mix up red and green, it means they mix up all colours which have some red or green as part of the whole colour. For example, a red/green colour blind person will confuse a blue and a purple because they can’t ‘see’ the red element of the colour purple. See the example of pink, purple and blue pen cases below to understand this effect.
Symptoms of colour blindness disease:
The symptoms of color blindness are often observed when children are still young. In other cases, symptoms are so slight, they may not even be noticed. Common symptoms of color blindness include:
- Difficulty distinguishing between colors
- Inability to see shades or tones of the same color
- Rapid eye movement (in rare cases)
Types of Colour Blindness:
Deuteranopia:
Deuteranopes are more likely to confuse between the mid-reds with mid-greens, blue-greens with grey and
mid-pinks ,bright greens with yellows and finally Pale pinks with light grey
Monochromacy:
People with monochromatic vision can see no colour at all and their world consists of different shades of grey ranging from black to white, rather like only seeing the world on an old black and white television set. Achromatopsia is extremely rare, occuring only in approximately 1 person in 33,000 and its symptoms can make life very difficult. Usually someone with achromatopsia will need to wear dark glasses inside in normal light conditions.
People with monochromatic vision can see no colour at all and their world consists of different shades of grey ranging from black to white, rather like only seeing the world on an old black and white television set. Achromatopsia is extremely rare, occuring only in approximately 1 person in 33,000 and its symptoms can make life very difficult. Usually someone with achromatopsia will need to wear dark glasses inside in normal light conditions.
Tritanopes:
The most common colour confusions for tritanopes are light blues with greys, dark purples with black, mid-greens with blues and oranges with reds.
Another example of the types of color blindness
![Picture](/uploads/4/2/0/5/42054361/7358479.png?922)
The Below table displays the percentage of men and women suffering the different forms of color blindness.
To know more about color blindness and the statistics about this disease please click on the button below
To take a color blindness test you can also click on the button below and it will take you to the quiz website.
Color Blindness. (n.d.). Retrieved January 8, 2015, from http://www.bausch.com/your-eye-concerns/diseases-and-disorders/color-blindness#.VK7RDVvS6sg
Types of Colour Blindness. (n.d.). Retrieved November 18, 2014, from http://www.colourblindawareness.org/colour-blindness/types-of-colour-blindness/
ColorVisionTesting | Colorblind. (2014, January 1). Retrieved November 18, 2014, from http://colorvisiontesting.com/what colorblind people see.htm
Prevalence. (2009, April 13). Retrieved December 16, 2014, from http://www.colour-blindness.com/general/prevalence/