What it is
A color blindness test, often called a color vision test, is a way of checking how the eyes and brain tell colors apart. Most people with color blindness can still see colors, but they may confuse certain shades, such as some reds, greens, blues or yellows.
Color vision differences are usually described by type. Protan and deutan types affect the red-green range, and tritan types affect the blue-yellow range. Severity can range from mild to more significant, and it varies from person to person.
Online screenings and printed charts can hint that something is different, but they are not the same as an evaluation by a licensed clinician. Screens, lighting and printing can all change how colors look, so a professional setting is generally more dependable.
How it’s traditionally been approached
Color vision has long been checked with plate-style tests, where numbers or shapes are hidden in patterns of colored dots. People who see color differently may read the pattern differently or not see it at all.
Other traditional approaches ask a person to arrange colored caps or discs in order, or to match colors using a special instrument. These methods are sometimes used to learn more about the type and severity of a color vision difference.
Testing is often part of a routine eye exam, and it may also be requested for school, work or licensing reasons. Color vision requirements for careers such as aviation, military, law enforcement, commercial driving, electrical trades and maritime work vary by employer and authority and change over time, so it's best to confirm current requirements directly with the specific employer, licensing body or agency.
How the right doctor may help
The right provider, such as an eye doctor offering comprehensive color vision testing, may help by using professionally administered tests under controlled conditions. A visit generally begins with a conversation about your history, any concerns, and whether color vision differences run in your family.
Many providers also offer pediatric color vision testing, which may be useful for children who are learning colors, reading color-coded materials or struggling with classroom activities. A child-friendly provider may explain each step in a calm, age-appropriate way.
Questions you might ask include: Which tests do you use? Can you tell me the type and severity? What do the results mean for school, work or daily life? Color-enhancing filter glasses and contact lenses do not cure color blindness and do not restore normal color vision, and how well they work varies by the person's specific type (protan, deutan or tritan) and severity, so ask whether they could be appropriate for you. Only a licensed clinician can decide that after an evaluation.
The whole-person view
Body, mind and stress affect each other. Finding out you or your child sees color differently can bring relief, curiosity or sometimes frustration, and those feelings can shape how comfortable you are with the process. Rest, routine and support from people you trust can all be part of feeling steady during an evaluation.
If worry or stress is weighing on you, some people explore body-based support through Somatic Experiences, and others find talk therapy through Therapists.plus helpful. These are optional ways to feel supported alongside, never instead of, guidance from a licensed provider.
Keep in mind
- This page is educational only and is not medical advice, a diagnosis or a substitute for an evaluation by a licensed professional.
- Color-enhancing filter glasses and contact lenses do not cure color blindness or restore normal color vision, and results vary by type and severity.
- A sudden change in color vision or vision can point to a health concern, so licensed professionals should guide care. For emergencies call 911, and in a crisis call or text 988.
- Career and licensing color vision standards vary and change, so confirm current requirements with the specific employer, licensing body or agency.
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Frequently asked questions
Where can I get a color blindness test near me?
Color blindness tests are typically offered by licensed eye care providers, often as part of an eye exam. Providers listed in a directory may offer comprehensive or pediatric color vision testing. It's a good idea to call ahead and ask whether they perform color vision testing and which methods they use.
Is an online color blindness test accurate?
Online tests can give a general hint, but they are not a substitute for a professional evaluation. Screen settings, lighting and display quality can all change what you see. A licensed clinician can test under controlled conditions and explain what the results mean.
Can a doctor tell what type of color blindness I have?
A provider may be able to identify whether your color vision difference is protan, deutan or tritan and how significant it is, depending on the tests used. Not every office uses the same tests, so it helps to ask in advance. The provider can explain what the results mean for you.
Can children be tested for color blindness?
Yes, many providers offer pediatric color vision testing using child-friendly methods. Testing may be helpful when a child has trouble with colors or color-coded schoolwork. A pediatric-focused provider can explain the process in an age-appropriate way.
Do color blind glasses cure color blindness?
No. Color-enhancing filter glasses and contact lenses do not cure color blindness and do not restore normal color vision. Some people find they help them tell certain colors apart, but effectiveness varies by the person's type and severity. Ask a licensed provider whether they might be appropriate for you.
Do I need a color blindness test for my job?
It depends on the field, employer and licensing authority, and requirements change over time. Careers such as aviation, military, law enforcement, commercial driving, electrical trades and maritime work often have their own standards. Confirm current requirements directly with the specific employer, licensing body or agency.
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.