What it is
Most color blindness is mild or moderate, and it affects how certain colors, such as reds, greens or blues, look. Severe color blindness is rarer. A person may see very few colors, or may see mostly shades of gray. Complete color blindness is often called achromatopsia or monochromacy.
Achromatopsia is usually present from birth. Along with limited color perception, it can come with strong sensitivity to light, eyes that move or flicker on their own (nystagmus), and vision that is less sharp than typical. Because these features can appear together, a child's first signs may be squinting in bright places or discomfort outdoors.
Low vision means vision that is reduced in a way ordinary glasses, contact lenses or standard treatment cannot fully correct. Some people with severe color blindness also have low vision. Color-enhancing filter glasses and contact lenses do not cure color blindness and do not restore normal color vision. How well they work, if at all, varies with a person's specific type (protan, deutan or tritan) and severity, and they may not be suited to total color blindness.
How it’s traditionally been approached
Eye care has long begun with a thorough eye exam. This may include color vision tests, a check of visual sharpness, and a look at the structures at the back of the eye. Eye doctors sometimes use specialized tests of how the retina responds to light. Some also use genetic testing to help clarify the cause, particularly when a condition runs in a family.
For severe color blindness there is generally no way to restore normal color vision. Care has traditionally focused on helping people see and function as comfortably as possible. That often includes tinted or filtering lenses for light sensitivity, hats or visors, and magnifiers or other low vision aids. Organization tools, such as labeling items and using contrast, are also common.
Low vision rehabilitation is a field in which specialists work with people on everyday tasks like reading, school, work and getting around. Children with suspected monochromacy may also be supported through school accommodations. Approaches differ from one provider and one person to the next, and a licensed clinician decides what is appropriate.
How the right doctor may help
The right eye doctor, such as an optometrist or ophthalmologist with experience in inherited eye conditions or low vision, may help you understand what is going on. A visit generally starts with questions about your or your child's history, including light sensitivity, how vision behaves in different settings, and whether anyone in the family has similar traits. An exam and tests usually follow.
A provider may be able to explain what the findings suggest and whether other specialists, such as a low vision therapist, a retina specialist or a genetic counselor, could be useful. They may also discuss whether tinted lenses, filters or other aids make sense. Only a licensed clinician can decide what is appropriate after an evaluation, and what helps one person may not help another.
Useful questions to bring include: What type and severity of color vision difference is present? Could this be achromatopsia, and how would we confirm it? What can we expect for light sensitivity and sharpness over time? Are color-enhancing glasses or lenses appropriate for my situation, and what are their limits? What school, work or driving requirements should we check on? Who else should be part of the care team?
The whole-person view
Body, mind and stress affect one another. Living with low vision or severe color blindness may bring fatigue from squinting or glare, worry for a parent about a child, or frustration at school or work. Those feelings are common, and they can in turn affect sleep, mood and energy. Looking at the whole person alongside the eyes can be a helpful frame.
Some people find body-based support, such as the practitioners connected with Somatic Experiences, helpful for managing stress that sits in the body. Others value talk therapy through a network like Therapists.plus to work through adjustment, confidence or family worries. These are options to explore alongside, not in place of, good eye care, and no approach is right for everyone.
Keep in mind
- Color-enhancing filter glasses and contact lenses do not cure color blindness and do not restore normal color vision, and results vary by type (protan, deutan or tritan) and severity.
- Licensed professionals should guide care for eye conditions, and only a clinician can diagnose or recommend products after an evaluation. Ask a provider about the regulatory status of any lens or device you are considering.
- Color vision standards for jobs and licenses, such as aviation, military, law enforcement, commercial driving, electrical trades and maritime work, vary and change over time, so confirm current requirements with the specific employer, licensing body or agency.
- For emergencies, including sudden vision loss, call 911. If you are in emotional crisis, call or text 988.
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Frequently asked questions
What is complete color blindness?
Complete color blindness, also called achromatopsia or monochromacy, is a rare condition in which a person sees very little or no color. It often comes with light sensitivity and reduced sharpness of vision. An eye doctor can evaluate whether it applies to you or your child.
Do color blind glasses work for severe color blindness?
No. Color blind glasses and color-enhancing contact lenses do not cure color blindness or restore normal color vision. Their effect varies by the type (protan, deutan or tritan) and severity, and they may not help with total color blindness. Ask your eye doctor whether they are appropriate for you.
How is achromatopsia evaluated?
An eye doctor generally evaluates achromatopsia with a history, a color vision test and an eye exam. Some providers also use specialized retinal testing or genetic testing. A licensed clinician decides which tests are appropriate.
What can help with severe light sensitivity?
An eye doctor or low vision specialist may discuss options such as tinted or filtering lenses, hats or visors, and changes to lighting. What helps varies from person to person. Only a licensed clinician can recommend what is right for you after an evaluation.
What is low vision rehabilitation?
Low vision rehabilitation is a type of care that helps people with reduced vision make the most of the sight they have for daily tasks. It may involve magnifiers, lighting and contrast strategies, and skills training. A low vision specialist can explain what might fit your needs.
What should I do if I think my child has monochromacy?
Schedule an exam with an eye doctor, ideally one experienced with children's vision or inherited eye conditions. Signs that may prompt a visit include strong discomfort in bright light, squinting, or eyes that move on their own. The doctor can explain what the findings mean and suggest next steps.
Educational resource. Colorblind Glasses shares general information and connects people with independent doctors. It is not medical advice, diagnosis or treatment. Talk with a licensed professional about your health.