On-Screen Colour Number Activity
The browser creates coloured dot patterns for a number-reading activity. These are not validated Ishihara plates, and the exercise cannot establish a colour-vision diagnosis or correct for display differences.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
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How to use this tool
Select the number you can see without straining. Note colour filters, night mode and room lighting if you repeat the activity, because changes in display conditions can affect the experience.
Results and examples
The number correct records answers to this generated set only. Do not translate it into a diagnosis, licence eligibility or occupational fitness; use a formal assessment when one is needed.
Worked example
If a displayed pattern appears to contain 8 and you choose 8, that item contributes to the correct count.
Limitations
- Display colour accuracy and brightness are not calibrated.
- The patterns have not undergone clinical test-plate validation.
Fields
| Field | Guidance and constraints |
|---|---|
| Number you see | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Frequently asked questions
Does a wrong answer prove a deficiency?
No. This activity cannot establish that conclusion.
Can I submit this for an employment test?
No. It is not an official vision-test result.
Related tools
You do not need to start over. Continue with the tool that fits your next step.
