Why Is Color Blindness More Common in Men?

Colour blindness is mostly influenced by genetics. Learn more about the conditions other contributing variables and why males are more likely to get it.

The wavelengths of light that are emitted towards the human eye determine the colours that are visible to it. The visible spectrum has a wide range of colours, yet not everyone perceives them in the same way.

Certain colours are invisible to people who are colour-blind, or they may not appear as vibrant. Although it can occur with age or certain medical conditions, colour blindness is typically inherited.

This article will examine the inheritance of colour blindness qualities from parents to their offspring and the reasons behind the higher incidence of colour blindness in those who are assigned to the masculine gender at birth.

Language matters

No matter what gender you identify with daily, genetics is ingrained in all of us from birth. This code determines in part the sex we are assigned at birth.

Those who were born with an X and Y chromosome are referred to in this article as "people who are assigned male at birth." Since they are born with two X chromosomes, people who are assigned females at birth receive various genetic features. To align with the terminology used in research, we also refer to men and women.

How does colour blindness affect males and females?

Colour blindness has multiple origins, although hereditary factors account for the majority of cases. Red-green colour deficit is a genetic condition where a person's ability to perceive red and green is impaired. The gene is passed down by an X chromosome.

A red-green colour deficiency gene transmitted on an X chromosome is expected to cause some degree of colour blindness since individuals assigned to the male chromosome at birth have one X and one Y chromosome.

Given that newborns assigned to the feminine sex have two X chromosomes, colour blindness would require the red-green colour deficiency gene to be inherited across both X chromosomes (by both parents).

Are males more likely to be colourblind?

Genetic principles dictate that mothers who are allocated female at birth are more likely to pass on this gene to their male offspring, as red-green colour blindness is the most frequent.

Some colour deficits, such as blue-yellow colour blindness, entail different chromosomes that aren't impacted by sex at birth, although other types of colour blindness can also be inherited.

Risk factors

While there are other risk factors as well, a family history of colour blindness is a significant one.

The following are some additional risk factors that may raise your lifetime chance of acquiring colour blindness:
  • diabetes
  • Alzheimer’s disease
  • multiple sclerosis
  • eye trauma or injury
  • brain injuries
  • age
  • being White
  • certain medications like hydroxychloroquine (Plaquenil)
  • retinal detachment
  • certain tumours
  • glaucoma
  • age-related macular degeneration

Is colour blindness genetic?

Colour blindness is not always inherited.

On an impacted X chromosome, red-green colour blindness is frequently inherited from mother to son in families. It appears that all colour blindness is inherited because red-green colour blindness is the most prevalent type.

Other types of colour blindness can develop throughout a lifetime from a variety of illnesses or accidents, or they can be inherited through other genes that aren't particular to the sex assigned at birth.

How do you manage colour blindness?

If you were colourblind from birth, you most likely never had to consider how to adjust.

Because congenital colour blindness is predetermined, your eyes' cones and rods are physically unable to distinguish particular colours. Sometimes, losing the ability to see specific colours might be harmful at worst or just inconvenient at best.

For instance, traffic lights are typically red, green, and yellow. Colorblind people typically pick up on where the "go" and "stop" lights are located in their area.

Supplementary colour vision can also be achieved using special glasses or contact lenses. To take preventative measures or actions to avoid any errors or harmful circumstances, certain jobs or activities may require you to take a test to determine whether you have deficits in your ability to see colour.


It is possible to inherit or acquire colour blindness. This deficit is more common in those who are assigned male at birth since it is typically carried through the X chromosome when it is inherited, or present at birth.


Can females be born colour-blind?

Women can technically be colour-blind, but it is rare

Is colour blindness only in males?

This explains why men are significantly more likely than women to be red- or green-colored blind. Because blue/yellow colour blindness is inherited on a non-sex chromosome, it affects both men and women equally.

Can you cure colour blindness?

There's no cure

Can a girl be colour-blind if her father is not?

If they also receive a copy of the colourblindness gene from their mother, they may become colourblind as well.

Post a Comment