ISSUE - Can you see the number 15 in this PseudoIsochromatic Plate (PIP)?
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| Archived < Wikipedia, based on the Ishihara test |
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| incidence by country |
Definition - The cone photoreceptors differ from those in most people so certain color sets are not distinguishable. More
Color Vision Deficiency (CVD)
Colorblindness
I've used a US government website to help me design ADA 508-compliant palettes . More tools.
Federal (US) design guidelines Start in black and white. Start with your core message and use type scale and hierarchy to test and refine its effectiveness. Then, introduce color to support that message. Color can overwhelm interpretation, and since approximately 4.5% of the population has some kind of color insensitivity, it’s important to convey your message without relying on color.
https://colormax.org/mobile/ other corrective lens vendors
Prevalence
https://www.colorblindguide.com/post/colorblind-people-population-live-counter There is general agreement that 1 in 12 men (8%) and 1 in 200 women are colorblind (approximately 4.5% of the world population), as a result, BY COUNTRY
https://joecsa.coecsa.org/index.php/joecsa/article/view/130 A, M. ., & A, Y. . (2020). Prevalence of congenital color vision defects among school children in five schools of Abeshge District, Central Ethiopia. The Journal of Ophthalmology of Eastern, Central and Southern Africa, 17(1). None of the children had known that they were colorblind. 1040 male school children - 44 cases (4.2%)
Possible screenings
https://www.colorlitelens.com/color-blindness-test.html (includes screen by screen tests)
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