Astigmatism Screening

ASTIGMATISM
TEST

A radial wheel of lines. You stare at the center and tap lines that look darker, blurrier, or thicker than the rest. Each eye tested separately. Takes about 2 minutes.

What this test screens for

Astigmatism is caused by an irregularly shaped cornea or lens. The eye focuses light unevenly, causing blur in specific directions. The fan chart reveals which meridian (axis) your eye struggles with most. This tool screens, it does not diagnose or measure prescription.

How to take the test

Remove any glasses except reading glasses — test without distance correction first
If you wear contacts for astigmatism, you can test both with and without for comparison
Cover one eye with your palm and hold the screen at arm's length (~50–60cm / 20–24 inches)
Normal reading distance is too close for this test. Arm's length gives a cleaner result.
Stare at the center dot — do not let your eye wander
Use your peripheral vision to compare the spokes. Moving your eye defeats the test.
Tap any spokes that appear noticeably darker, thicker, blurrier, or more crisp than the others
If all spokes look equally clear — that's a valid answer. Don't force a selection.
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RIGHT EYE — STEP 1 Tap darker lines
Cover your LEFT eye with your palm
Hold screen at arm's length. Keep RIGHT eye on the center dot.
Eye complete
LEFT

EYE

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Results

ASTIG
PROFILE

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Results Disclaimer
These results are screening observations only, not a measurement or diagnosis. Screen-based astigmatism testing is heavily affected by viewing distance, display resolution, head angle, and accommodation. A precise astigmatic axis and power measurement requires a clinical refraction by a licensed optometrist or ophthalmologist. Do not use these results to order glasses, contacts, or to make any medical decision. Results are processed locally and never transmitted.