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Found a bug or a mistake, or have an idea? We would love to hear from you.
Good things to write about:
- A fact or source that looks wrong.
- A plate that is unreadable, or a page that does not work on your phone or browser.
- A test or page you would like to see.
We read every message, but we cannot give personal medical advice or review your results. For questions about your eyes or your color vision, please talk to an optometrist or eye doctor.