Point at it. Get the family, not the hue.
Cone Check names a color by family and lightness, says what it is easy to mix up with, and keeps everything on this device.
Free. No sign-up. Nothing is uploaded. Screening tools are not a diagnosis.
Not medical advice. Cone Check does not judge food doneness, identify medication by pill color, or diagnose skin conditions. Those need the right tools and a clinician — not a phone camera.
Common enough that you probably know someone
- 1 in 12 men
- 1 in 200 women
Red-green deficiency is the kind people usually mean by colorblindness. The National Eye Institute reports the rate for men. MedlinePlus Genetics, at the National Library of Medicine, reports both rates for people of Northern European ancestry, and the rates are lower in many other ancestry groups. Most people who have it are born with it and still see color. Red and green are the hardest pair to separate. Blue-yellow deficiency is far rarer, under 1 in 10,000 people, and it affects men and women about equally.
Sources: National Eye Institute; MedlinePlus Genetics, National Library of Medicine.
The plates are an original screening, not the Ishihara test. The percentages estimate cone response from this sitting. They are not a count of cells and not a medical diagnosis.