Color Vision Test
Based on Ishihara / HRR / D-15 and other international standards, complete red-green color vision screening in minutes
Color Vision Science
Three Cone Types
Human retina contains S (short/blue), M (medium/green), and L (long/red) cone cells, most sensitive to 420nm, 530nm, and 560nm wavelengths respectively. Color vision deficiencies usually stem from dysfunction in one or more cone types.
Color Vision Simulation
Under normal vision, traffic lights, fruits, and rainbows are vivid and distinct. Color-deficient individuals (e.g., red-green blind) perceive these scenes with altered hue combinations, affecting daily life and career choices.
Visible Spectrum
The human-visible light wavelength range is approximately 380nm (violet) to 700nm (red). Color vision tests evaluate your ability to discriminate specific wavelength combinations across this spectrum.
Color Vision Simulator
Drag the slider to see the world through different color vision deficiencies
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More Features
Exam Scene Guide
Color vision requirements for driving, college entrance and civil service exams
View GuideColor Vision Knowledge
Principles, genetics and common myths
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My Test RecordsColor Blind Simulator
Simulate protan / deutan / tritan vision
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