Eye tests and tools
18 free tests and calculators. Screen settings and lighting affect results; results are only a rough indication.
These tests are for screening only. They do not diagnose and do not replace an eye examination. If you suspect a problem, see an eye doctor.
Vision tests
- Visual Acuity TestScreen-calibrated tumbling-E test that estimates how sharply each eye sees at a set distance.
- Amsler Grid TestCheck the centre of your vision for wavy, blurred or missing areas, one eye at a time.
- Colour Vision TestRead numbers hidden in coloured dot plates to screen for red-green and blue-yellow colour deficiency.
- Contrast Sensitivity TestRead letters that fade step by step to get a rough score for how well you see low-contrast detail.
- Astigmatism TestLook at a clock dial of radiating lines: if some look darker or sharper, astigmatism may be present.
- Near Vision TestRead paragraphs in shrinking print at 40 cm to check your close-up vision and screen for presbyopia.
- Blind Spot TestMake a dot vanish with one eye closed and discover the natural blind spot every eye has.
- Dominant Eye TestFind your dominant eye in under a minute with the hand-triangle (Miles/Porta) method.
- Peripheral Vision TestKeep your eyes on the centre and press when dots appear at the edges to map your side vision roughly.
Questionnaires
Calculators & simulators
- Colour Blindness SimulatorSee any photo as people with protanopia, deuteranopia, tritanopia or achromatopsia see it.
- Eye Colour CalculatorEstimate a baby's eye colour chances from the parents' (and grandparents') eye colours.
- Prescription ExplainerEnter SPH, CYL, AXIS, ADD and PD to understand your glasses prescription in plain language.
- Screen Setup CalculatorEnter your screen size and resolution to get ideal viewing distance, height, font size and a break plan.
- Face Shape & Frame FinderAnswer a few questions to find your face shape and see which glasses frame styles tend to suit it.