Blue-Yellow Color Blind Test (Tritanopia)

Screen for Tritanopia and Tritanomaly with our blue-yellow color vision assessment test.

Coming Soon

Our specialized blue-yellow color blind test is currently under development. In the meantime, try our Ishihara test for general color vision screening.

Understanding Blue-Yellow Color Blindness

Blue-yellow color blindness (Tritanopia/Tritanomaly) is much rarer than red-green color blindness, affecting less than 0.01% of the population. Unlike red-green deficiency, it affects men and women equally.

Tritanopia

Complete blue-yellow color blindness. Blues may appear greenish, and yellows may appear violet or light gray.

Tritanomaly

Reduced blue sensitivity. Colors may appear slightly shifted, with difficulty distinguishing blue from green.

Blue-yellow color blindness can be inherited or acquired later in life due to age-related changes, certain medications, or eye conditions.

Sources

National Eye Institute (NEI) — Overview of all color blindness types including Tritanopia
American Academy of Ophthalmology (AAO) — Clinical information on blue-yellow color vision deficiency
National Health Service (NHS) — Causes and management of colour vision deficiency including acquired forms
Colour Blind Awareness — Prevalence and types of color vision deficiency

Frequently Asked Questions

Tritanopia is a rare form of color blindness caused by the absence or malfunction of blue-sensitive (S) cone cells. It makes it difficult to distinguish between blue and green, and between yellow and red or pink.

Very rare. Tritanopia affects less than 0.01% of the population and occurs equally in men and women, unlike red-green color blindness which predominantly affects males.

Yes. Unlike red-green color blindness which is almost always inherited, Tritanopia can develop later in life due to age-related lens yellowing, certain medications, or eye conditions like glaucoma or optic neuritis.

No. The Ishihara test is designed specifically for red-green color deficiency. Detecting Tritanopia requires specialized tests that use blue-yellow confusion lines, such as the Cambridge Color Test or Farnsworth D-15.