Basics
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Resources
For You
Summary
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.
Specifics
- Achromatopsia (American Association for Pediatric Ophthalmology and Strabismus)
Genetics
- Achromatopsia: MedlinePlus Genetics (National Library of Medicine)
- Color vision deficiency: MedlinePlus Genetics (National Library of Medicine)
Statistics and Research
- Eye Health Data and Statistics (National Eye Institute) Also in Spanish
Clinical Trials
- ClinicalTrials.gov: Color Vision Defects (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Prevalence of color vision deficiency in Africa: Systematic review and meta-analysis.
- Article: Evaluation of Retinal Structure and Visual Function in Blue Cone Monochromacy...
- Article: Longitudinal Imaging of the Foveal Cone Mosaic in CNGA3-Associated Achromatopsia.
- Color Blindness -- see more articles
Find an Expert
- American Optometric Association
- Find an Ophthalmologist (American Academy of Ophthalmology) Also in Spanish
- National Eye Institute
Children
- Ask a Scientist: What Is Color Blindness? (National Eye Institute)
- Color Blindness (American Association for Pediatric Ophthalmology and Strabismus)
Patient Handouts
- Color blindness (Medical Encyclopedia) Also in Spanish
- Color vision test (Medical Encyclopedia) Also in Spanish