Ages 4–6
Help your child find shapes hidden in colored dots, without reading numbers. This red-green vision self-check is not a diagnosis.
A no-numbers shape screen for children who can match a circle, square, or star.
Why Ishihara (Unlettered) fits ages 4–6
The Ishihara test for unlettered persons is the no-numbers version of the classic Ishihara plates, made for young children and anyone who can't read numbers. Instead of reading a hidden number, the child identifies or traces a simple shape hidden in the colored dots.
It screens for red-green color vision deficiency and suits children from about age 4 to 6. This online version uses tappable shapes (circle, square, star) and freshly generated plates, and is a self-check, not a diagnosis.
Each plate hides a simple shape — a circle, square, or star — in a field of colored dots. The classic printed test has children trace a winding line or shape with a finger; online, your child just spots the shape.
Your child taps the shape they see, or traces it on the screen with a finger. No numbers to read, so it works for pre-readers. Tap 'Nothing' if no shape stands out.
We count which plates were missed to flag whether a red-green difference is likely. On an uncalibrated home screen, read the result as a screening hint, not a diagnosis.
Red-green screening. Flags whether a red-green color vision difference is likely present — the part to trust most.
Type is approximate. A red-weak versus green-weak hint is only a rough estimate, especially for a young child.
Not a complete color exam. This screen does not test blue-yellow vision or precisely measure the strength of a difference.
Confirm important results. For school or medical decisions, ask an eye-care professional to repeat the test with calibrated tools.
This is a free screening and self-assessment tool, not a medical diagnosis. Results are affected by your screen, its color settings, and room lighting.
It's designed for ages 4–6. Simple shapes instead of numbers — point to the one you see. A younger child may do better with picture matching, while a confident reader can also use the standard numbered Ishihara test.
Compare tests by ageIf the task feels too easy or too hard, choose the format that best matches your child's age and attention—not the most clinical-sounding name.
It's a version of the Ishihara color blindness test that replaces hidden numbers with shapes and winding lines the person identifies or traces, so young children and people who can't read numbers can be screened for red-green color vision deficiency.
It works well for children from about age 4 to 6 — old enough to know basic shapes but too young to read numbers reliably. Younger children may do better with picture matching (CVTME).
The science (brightness-matched colored dots) is the same. The only difference is the response: shapes or a traceable line instead of reading numbers, which removes the reading barrier for young children.