A quiet, at-home visual acuity screening
Sight Calculator is a free, private tool for checking in on your near-vision between eye exams. It runs entirely in your browser — nothing you enter is sent anywhere — and takes about a minute. It's a casual screening, not a diagnosis, so pair it with regular visits to a licensed eye care professional.
Sit arm's length away, or ~2m for large displays.
Cover one eye and look at what's shown below.
Tap “Yes, clearly” or “No, blurry” for each one.
Sit arm's length away,
or ~2m for large displays.
Cover one eye, look below.
Tap “Yes, clearly” or “No, blurry”.
Learn more: Common Eye Diseases · Red-Flag Symptoms · Vision Correction Options · Preventative Habits