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  • Color blindness affects approximately every 1 in 12 men (8%) and 1 in 200 women (0.5%). It is about 15% of the entire population, most of whom are male.
  • Color blindness is also known as ‘color deficiency’ and ‘poor color vision’. It happens when the pigments in the cones of the eye have a problem. The eye faces trouble seeing colors.
  • In some cases, if a single pigment is missing, the eye might have problem seeing the specific color. But if all the pigments are missing in the cones, the eye will not see any color at all. This severe condition is known as achromatopsia.
  • As red-green color blindness is inherited from a mother to her son, a father never passes this type of color blindness on to his children

Difficult to distinguish for colourblind person.

Colour combination

Colors from the whole color spectrum can cause problems in terms of not being able to distinguish them if you are color blind.

The table on the left shows five example color pairs of confusion.  I have chosen some colors in the colour spectrum which I—as a strongly red-blind guy—can not distinguish.As you can see, not only the base colors red and green cause problems. It is the mixture of the red part in the  colors which makes colors in distinguishable for my eyes.

Why is it important to have colour blindness properly diagnosed?

Colourblind people face many difficulties in everyday life which normally sighted people just aren’t aware of. Problems can arise in even the simplest of activities including

  • Choosing and preparing food
  • Gardening
  • Sport
  • Driving acar
  • Selecting which clothes to wear.
  • Colourblindness can affect access to education, exam grades,performance,confidence and career choice.
  •  Difficult to tell the difference between green and ripe tomatoes or between ketchup and chocolate sauce.
  • Colourblind people often try to eat unripe bananas because they can’t tell the difference between a green unripe banana and a yellow ripe banana – to them because both of the colours are the same shade they often think they are the same colour.
  • In adults, having Colour Vision Deficiency can affect which careers you can pursue and be a frustrating condition to live with at times.
  • colourblindness can significantly impact quality of life for health, emotions, and especially careers.
  • A child with a severe condition such as deuteranopia may seemingly be able to accurately identify colours which they can’t see (e.g. red) because they have been taught the colour of objects from an early age and will know for example that grass is green and strawberries are red even if they have no concept of their true colours.

What do you see if you are colorblind?

  • We learned now a lot about the different types and categories of color vision deficiencies. But what does it really look like if you are colorblind? How do you see the world if you are colorblind? The four pictures below should give you a first impression.

If you have normal color vision you might realize that in the case of red-green color blindness (protanopia/deuteranopia) not only red and green colors are affected but the whole color spectrum is perceived differently. The same is of course true for blue-yellow color blindness (tritanopia). This is based on the fact, that all colors are perceived as a mixture of the three different cone types, and if one of them is missing the whole color spectrum changes.