A quick screening for red-green color vision deficiency, the most common type. Read the number in each plate — or say you can't see one. This is a screening, not a diagnosis.
Plate 1 of 6
This screening is visual by nature: it depends on telling colors apart on your screen, so it cannot be taken with a screen reader.
Color vision deficiency — commonly called color blindness — usually means certain colors are harder to tell apart, not that someone sees no color at all. The most common form affects the red-green range and is largely inherited, which is why it's far more common in men.
This screening only looks at the red-green range, because those plates are the most reliable to reproduce. It does not test the much rarer blue-yellow type. A professional exam can identify which type and how strong it is — useful information for some careers and for everyday things like reading color-coded charts.
If some plates were hard to read, an eye care professional can confirm with proper testing. While you're here, you can also measure your pupillary distance — useful if you're ordering glasses online.
This is a screening, not a diagnosis. This test cannot diagnose color vision deficiency or determine its type or severity. Results depend heavily on your screen. If you have concerns about your color vision — or any sudden change in how you see color — see an optometrist or ophthalmologist.