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At-home check
Astigmatism test
A radial line pattern. If some lines appear darker than others, it can hint at uneven focus across the cornea.
Before you start
This is an informal screening tool — it is not a medical diagnosis. Screen size, lighting, distance, and even tiredness will influence what you see.
If you wear glasses or contact lenses for distance vision, keep them on. Sit a comfortable arm's length from the screen, in even lighting, with no glare on the screen.
Your result is shown only to you — nothing you do here is stored on our servers.