Contact Us
ColorBlindTests.net is run by one person. Email reaches me directly, and I try to reply within 24 hours on weekdays.
What I can help with
- Questions about a result. What a protan/deutan axis reading means, why two tests on this site disagree, or why a result changed between devices.
- Corrections. If something here is factually wrong — a misread study, a wrong prevalence figure, an outdated occupational requirement — tell me and I will fix it and say so on the page.
- Accessibility. If a test is unusable with a screen reader, keyboard, or at high zoom, that is a bug. Please report it.
- Teachers and clinicians. Using these tests in a classroom or practice? I am glad to explain what each screen version can and cannot tell you.
- Privacy requests. For data questions, write to privacy@colorblindtests.net — see the Privacy Policy.
What I cannot do
I cannot diagnose you or issue any document for a job, licence, or medical record. Every test here is a screening tool that runs on an uncalibrated screen. For a result that counts officially, you need an in-person exam with calibrated plates or an anomaloscope — see the medical disclaimer.