Online vision test: acuity, colour blindness, astigmatism

Free online vision checks: a visual acuity chart (Sivtsev) calibrated to your screen, a colour blindness test, an Amsler grid and an astigmatism test. Right in the browser, no sign-up, instant results. These are self-checks and a reference point, not a diagnosis — if in doubt, see an ophthalmologist.

Acuity & sharpness

Visual acuity chart (calibrated to your screen) and an astigmatism test.

Visual acuity test (Sivtsev chart)An online chart calibrated to your screen and distance: find your visual acuity in familiar values and in 20/20 notation.
Astigmatism testA radial fan: if some lines look darker or sharper, astigmatism is possible. Per-eye check.

Colour & retina

A colour blindness test and an Amsler grid to self-check the centre of the retina (macula).

Vision drops not only from the eyes

Diabetes, hypertension and deficiencies damage the retinal vessels. Upload your labs — AI reviews the values and tells you what to check.

Decode my lab results

Useful articles

What affects vision through vessels and metabolism — body and eyes are connected.

Still have questions about your health?Ask the AI assistant in plain words — about symptoms, how you feel, sleep, or what a value means. No files needed, first question free. Ask AI about health

The checks in this section are self-checks and a reference point, not medical diagnostics. Results depend on your screen, distance, lighting and fatigue. If your vision drops, you see distortions or spots, or you doubt your colour vision, see an ophthalmologist.