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.
- Achromatopsia (American Association for Pediatric Ophthalmology and Strabismus)
Statistics and Research
- Testing Children for Color Blindness (American Academy of Ophthalmology)
- ClinicalTrials.gov: Color Vision Defects (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Clinical and Molecular Characterization of Achromatopsia Patients: A Longitudinal Study.
- Article: Specificity of the chromatic noise influence on the luminance contrast discrimination...
- Article: Long-Term Investigation of Retinal Function in Patients with Achromatopsia.
- Color Blindness -- see more articles
- Ask a Scientist: What Is Color Blindness? (National Eye Institute)