Important: This page is general information, not medical advice. It does not recommend or prescribe any treatment. Always consult your doctor or pharmacist before starting, stopping or changing any medicine.
About Color Blindness
Most of us see our world in color. We enjoy looking at a lush green lawn or a red rose in full bloom. If you have a color vision defect, you may see these colors differently than most people.
There are three main kinds of color vision defects. Red-green color vision defects are the most common. This type occurs in men more than in women. The other major types are blue-yellow color vision defects and a complete absence of color vision.
Most of the time, color blindness is genetic. There is no treatment, but most people adjust and the condition doesn't limit their activities.
It sits within Eyes and Vision and Genetics/Birth Defects.
The lead U.S. institute for this subject is the National Eye Institute.
When to speak to someone. Reading about a topic cannot tell you whether it applies to you. Speak to a doctor or pharmacist if symptoms are severe, sudden, getting worse, or simply not going away — and seek emergency care immediately for chest pain, breathing difficulty, sudden weakness or confusion, or a serious allergic reaction.
Research on Color Blindness
68 studies areregistered for this condition on ClinicalTrials.gov, the U.S. National Library of Medicine's public registry. A selection is below — the links go straight to the registry entry, not to a summary of ours.
What a registered study does and does not mean. Registration means a study exists and has been declared publicly. It says nothing about whether the treatment being tested works, is safe, or is available to you. Many studies find no benefit — that is what research is for. Never seek out an experimental treatment on the strength of a registry entry alone.
Research currently under way
- Optilume™ BPH Catheter System in Men With Symptomatic BPHUrotronic Inc.
- Naturally Produced Cannabinoids for Neuroprotection From ConcussionUniversity of Regina
- Imaging Studies in Corticobasal SyndromeJennifer Whitwell
- Alcohol Use Disorder and CannabidiolUniversity of Colorado, Denver
- Study Protocol: The Jerte Valley as an Inclusive Outdoor Classroom. Smart and Active Tourism.Universidad de Extremadura
- Inherited Retinal Degenerative Disease RegistryFoundation Fighting Blindness
Research already completed
- Plaque Modification and Drug Coated Balloons for Treatment of de Novo Calcific Coronary LesionsUniversity of Rome Tor Vergata
- MIRAGE Study: Clinical Outcomes of the Mamba Sirolimus-Eluting PTCA BalloonFrisch Medical Device Private Limited
- Re-use of Ambu aScope During Exploration of the Common Bile Duct for Stones in Low-Resource Settings- a Retrospective StudyB.P. Koirala Institute of Health Sciences
- Psychological Intervention Using Smartphone Technology to Alleviate Malignant PainUniversity of Oklahoma
- Virtual Cognitive Behavioural Therapy for PsychosisUniversity of Toronto
Study data from ClinicalTrials.gov, a service of the U.S. National Library of Medicine. Retrieved 2026-07-30. Registry entries are supplied by study sponsors and investigators; ClinicalTrials.gov does not verify their scientific validity. PocketsInfo is not affiliated with, and not endorsed by, the NLM or the NIH.
Where to read more
Rather than paraphrase, we point you to the primary sources. Every link below is to a government health agency, a national institute or a recognised medical body — grouped by what you are trying to find out.
Start Here
- Color BlindnessNational Eye Institute
- What Is Color Blindness?American Academy of Ophthalmology
Genetics
- Achromatopsia: MedlinePlus GeneticsNational Library of Medicine
- Color vision deficiency: MedlinePlus GeneticsNational Library of Medicine
Statistics and Research
- Eye Health Data and StatisticsNational Eye Institute
Clinical Trials
- ClinicalTrials.gov: Color Vision DefectsNational Institutes of Health
Medical subject headings
Clinicians and researchers index this subject under Color Vision Defects. These are the terms to use when searching medical literature.
This page is built from the MedlinePlus health topic record for Color Blindness, a service of the U.S. National Library of Medicine (NLM), National Institutes of Health. Information is from MedlinePlus.gov. PocketsInfo is not affiliated with, and is not endorsed by, the NLM or the NIH. Retrieved 30 July 2026.