Is Colour Blindness More Common In Men Or Women?

 Is Colour Blindness More Common In Men Or Women?

As you’d expect, a tendency towards colour blindness is all down to our genes. Men are found to be color blind more often than women and this is because they have an X and a Y chromosome. A man can inherit an X chromosome from his mother which passes on color blindness.

Complete colour blindness (where the viewer is unable to see any colour at all) is actually quite uncommon, as is blue/yellow color blindness.

What is Colour Blindness?

Colour blindness, scientifically termed “colour vision deficiency,” refers to the inability to perceive certain colors accurately. The condition stems from anomalies in the photopigments of the eye’s cone cells, which are responsible for detecting different wavelengths of light. The most common form of color blindness is red-green color blindness, where individuals have trouble distinguishing between red and green hues.

The Problems Caused By Being Colour Blind

So does being Colour Blindness cause problems? What happens for example, when a color-blind man is confronted with traffic lights? How can he differentiate between the red and the green lights? Actually, it’s not so difficult, because it is easy to see when a light is illuminated, even if you can’t actually tell which colour it is.

It’s possibly more of a problem when you’re trying to match the colours of clothes together. How do you avoid putting a scarlet pair of trousers together with a clashing orange shirt? Putting a garish tie on on a sombre occasion? Again, people who have difficulty discriminating between colours will probably have to label their clothes inside the label – or ask a trusted friend for advice.

Some people see numbers and letters as colours, a condition known as ‘synesthesia’. For example, you might always see the number ten as a red color, and the number two as a brown color. Or perhaps you see different letters of the alphabet in a rainbow of colours.

What Causes Color Blindness?

On your retina at the back of your eye, you have cells known as ‘cones’. Each cone can decipher colors and combinations of colors. So to see colors correctly, you need all of the red, blue, and green cones necessary. If you don’t have these or they do not function, you will have trouble differentiating between different colors as your brain will not receive the correct messages from your eyes.

You might see a grassy lawn that you know should look green – but it might appear to you as grey.

How Colour Blindness Is Diagnosed

Special tests have been developed by opticians to ascertain the exact degree of colour blindness from which a patient suffers. Special colourful diagrams have been developed with a design or shade in the colour that is known to be problematic. Somebody with a color issue won’t be able to pick out a pattern or shape.

So men suffer from colour blindness more often than women. But unless you are planning on a career like being an interior decorator, fashion designer – or maybe a landscape gardener, colour blindness doesn’t need to be a serious issue

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Unravelling the Mystery: Why Are More Males Affected by Color Blindness Than Females?

Research and data have consistently shown that color blindness is significantly more prevalent among males than females. According to the National Eye Institute, approximately 8% of males and 0.5% of females of Northern European descent experience color blindness. This gender discrepancy has intrigued scientists for decades, prompting investigations into the genetic and biological factors that underlie this phenomenon.

Genetic Factors and X-Linked Inheritance:

The inheritance patterns of the X and Y sex chromosomes are the main cause of the increased occurrence of colour blindness in men. The X chromosome is home to the genes that control colour vision. While females have two X chromosomes, males only have one X and one Y chromosome.

In a classic example of X-linked recessive inheritance, if a male inherits an X chromosome carrying a mutated colour vision gene, he will exhibit colour blindness because the Y chromosome does not carry a corresponding gene to compensate. In contrast, females have two X chromosomes, providing a safeguard against colour blindness. If one X chromosome carries the mutated gene, the other X chromosome may carry a healthy version, allowing females to possess a wider range of colour vision.


Colour blindness remains a captivating topic that highlights the intricate interplay between genetics, inheritance, and human perception. The higher prevalence of colour blindness among males is a result of the unique genetic makeup and X-linked inheritance patterns. As we journey through the realm of scientific exploration, we gain a deeper appreciation for the complexity of our genetic inheritance and its profound impact on our sensory experiences.

By unravelling the mystery behind the gender discrepancy in colour blindness, we gain a clearer understanding of the intricate tapestry of human biology.

Also Read: How Men And Women See Colours

Prakhar Singh

A man who loves writing about health and fitness more than anything. His interest area include alternative health, education, Yoga and meditation. Whenever he is free from his study, he enjoys to write content to spread knowledge.

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