Visual Acuity Screening
Check distance vision with a digital logMAR chart
ETDRS-inspired acuity screening calibrated for your screen — educational and honesty-dependent. Sign in to take it; results include dual modern + Ayurvedic insight packs.
Understanding visual acuity screening
Adults wanting an educational distance-vision screen on a phone or laptop who will follow distance and calibration steps carefully — not a substitute for refraction.
What acuity means
Visual acuity describes how sharply you resolve detail at a given distance. LogMAR charts (ETDRS-inspired) present rows of letters that get smaller; the smallest row you can reliably read informs an educational acuity estimate.
Why distance and calibration matter
On a phone or laptop, letter size must match the viewing distance you actually use. If you sit closer than instructed, or skip calibration, letters are optically the wrong size and the estimate is not meaningful. Honesty beats “gaming” the chart.
How ayuveda.ai uses it
Results provide educational metrics and dual insight packs (modern + Ayurvedic sensory framing). They never issue a glasses prescription or clear you for driving — book an optometrist or ophthalmologist for clinical care.
Model / tradition: Digital ETDRS-inspired logMAR chart (educational). Screen size, viewing distance, and pixel density affect letter size — honest setup is required. Not a clinic exam or prescription.
Getting a fair screen
These cards cover what the chart measures and how to set up so results stay educationally useful.
logMAR chart
ETDRS-inspired rows
“Smaller letters, sharper demand”
- Read the smallest line you can see reliably
- Do not squint unfairly or peek closer mid-row
- Cover one eye when instructed
- Guessing every letter reduces usefulness
Distance honesty
Sit where the app says
“Wrong distance = wrong size”
- Measure or mark the required viewing distance
- Do not lean in when letters get hard
- Keep the screen upright and glare-free
- Retake if you realise you sat too close
Screen calibration
Match device to chart
“Pixel size and zoom matter”
- Follow on-screen calibration steps fully
- Avoid browser zoom that scales the chart oddly
- Prefer a stable device over a shaky handheld
- If calibration fails, stop and retry later
Not a refraction
No prescription here
“Screen ≠ clinic lane”
- Does not determine sphere, cylinder, or axis
- Does not replace slit-lamp or dilated exams
- Sudden vision loss needs urgent care
- Children and contact-lens fittings need professionals
Acuity vs colour vision
Acuity asks how sharp detail is. Colour vision asks how well hues are discriminated. Both can be screened educationally at home with limits; neither replaces a full eye exam. Sudden changes in either warrant professional care.
Explore Color Vision ScreeningSharpness
Visual acuity
Digital logMAR — educational distance detail. Calibration and distance honesty required.
Hue
Colour vision
Ishihara-style plates and D-15 — educational colour discrimination on your display.
How it works
Calibrate, set distance, screen each eye as instructed, then review educational metrics.
- 1
Calibrate your screen
Complete the in-app calibration so letter sizes match your device. Skip this and results are not meaningful.
- 2
Set viewing distance
Sit at the distance the tool specifies. Mark the spot if needed so you do not drift closer on hard lines.
- 3
Read the chart
Follow eye-covering instructions and read the smallest reliable line. Stay honest when letters blur.
- 4
Review metrics and insight packs
See educational results, then open dual packs. Book a professional exam for prescriptions or sudden changes.
How to screen well
Acuity screens fail when distance or zoom is wrong. Setup first; pride later.
- Finish calibration completely before reading letters.
- Keep the instructed distance — leaning in inflates your score falsely.
- Wear the glasses or contacts you normally use for distance, unless told otherwise.
- Sudden vision loss, flashes, or curtains over vision need urgent clinical care.
What you get
- Educational acuity estimate from a digital logMAR chart
- Setup guidance emphasising distance and calibration honesty
- Dual modern + Ayurvedic insight packs after screening
- Clear reminder that prescriptions require an eye-care professional
Visual acuity FAQs
LogMAR charts (ETDRS-inspired) use logarithmically spaced letter sizes for more consistent scoring than some older Snellen layouts. This tool adapts that idea to a digital educational screen.
Educational disclaimer
Educational only — not a clinical refraction, not a driver’s licence vision test, and not a substitute for an eye exam. Incorrect distance or calibration produces misleading results. See an eye-care professional for diagnosis and prescriptions.
Screen distance vision carefully
Calibrate, keep your distance, and complete a logMAR educational screen in about 5–10 minutes — then see a professional for prescriptions.