Color blindness

By Medically reviewed by hellodoktor


What is color blindness?

Color blindness is a common condition, characterized by the difficulty or inability to distinguish colors. People with colorblindness can’t distinguish between red and green in almost case. However, in some less common cases, people with color blindness cannot distinguish yellows and blues.

Color blindness ranges from mild to severe.

  • The mild case is more common. People with color blindness, in this case, can see yellow, gray, beige, blue rather than the reds, greens, and teals.
  • The severe case is rare. People with complete color blindness (achromatopsia) can see only gray, black and white.

There are two types of color blindness:

  • Inherited color blindness is more common than acquired color blindness. It occurs due to a genetic defect. The family history of having color blindness is the highest risk factor of this kind.
  • Acquired color blindness develops in life caused by a disease that damages the optic nerve or the retina of the eye.

How common is color blindness?

This color blindness is common. It commonly affects more males than females. It can affect patients at any age. It may be managed by reducing your risk factors. Please discuss with your doctor for further information.


What are the symptoms of color blindness?

The most common symptom of color blindness is the change in your vision, either it become more difficult to distinguish between some different colors (for example, the red and green traffic light) or colors may seem less bright than before.

You should consult your doctor to suspect you or your child is colorblind. They’ll be able to confirm the diagnosis and rule out other more serious health issues.

There may be some symptoms not listed above. If you have any concerns about a symptom, please consult your doctor.

When should I see my doctor?

You should contact your doctor if you have any of signs or symptoms listed above or have any questions. Everyone’s body acts differently. It is always best to discuss with your doctor what is best for your situation.


What causes color blindness?

Color blindness can be caused by different reasons by which one or more of these cones in your retina is damaged or isn’t present, such as:

  • Heredity;
  • Diseases: glaucoma, macular degeneration, diabetes, retinopathy, Parkinson’s disease, Alzheimer’s disease, multiple sclerosis;
  • Taking some medications, such as antipsychotic medications chlorpromazine (Thorazine) and thioridazine (Mellaril), antibiotic ethambutol (Myambutol);
  • Having a cataract.

Risk factors

What increases my risk for color blindness?

There are many risk factors for color blindness, such as:

  • Aging;
  • Toxic chemicals.

Diagnosis & treatment

The information provided is not a substitute for any medical advice. ALWAYS consult with your doctor for more information.

How is color blindness diagnosed?

Color blindness can be diagnosed through “pseudo-isochromatic plates” test. If you’re colorblind, you may not see the number or may see a different number.

How is color blindness treated?

In case that color blindness is caused by the use of certain medicines or conditions that can be helped with other therapies, you can stop using medications or treating the conditions to treat color blindness.

For other reasons, there are no treatments for most types of color vision difficulties.

However, wearing a colored filter over eyeglasses or a colored contact lens may enhance your perception of contrasts.

Lifestyle changes & home remedies

What are some lifestyle changes or home remedies that can help me manage color blindness?

The following lifestyles and home remedies might help you cope with color blindness:

  • Memorize the order of colored objects.
  • Label colored items that you want to match with other items.

If you have any questions, please consult with your doctor to better understand the best solution for you.

Hello Health Group does not provide medical advice, diagnosis or treatment.

msBahasa Malaysia


Review Date: October 28, 2016 | Last Modified: September 13, 2019

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