What 6/6 vision means
6/6 is the metric form of 20/20. It indicates that you can read at 6 metres what an eye with standard visual acuity reads at 6 metres. Many Commonwealth countries and Indian clinical centers report vision using metric notation, while North America measures at 20 feet (about 6.1 metres). 6/6, 20/20, and decimal 1.0 all describe normal baseline distance acuity.
6/6 to 20/20 conversion chart
Every row below represents one line on a standardized visual acuity chart written in metric, imperial, and decimal formats:
| Metric (6 m) | Feet (20 ft) | Decimal | Clinical Significance |
|---|---|---|---|
| 6/6 | 20/20 | 1.0 | Normal baseline distance acuity |
| 6/7.5 | 20/25 | 0.8 | Near normal; passes all driving standards |
| 6/9 | 20/30 | 0.67 | Mild distance blur |
| 6/12 | 20/40 | 0.5 | Standard DMV minimum driving cutoff in most jurisdictions |
| 6/18 | 20/60 | 0.33 | Restricted license or corrective lens requirement |
| 6/24 | 20/80 | 0.25 | Requires corrective lenses for safe driving |
| 6/30 | 20/100 | 0.2 | Substantial distance impairment |
| 6/60 | 20/200 | 0.1 | Statutory legal blindness cutoff without correction |
How to check 6/6 acuity at home
Position yourself exactly 6 metres (or 20 feet) from your screen. Calibrate your display using a physical bank card or ID card, because an uncalibrated optotype cannot provide accurate angular measurements. Gently cover one eye with your palm without pressing against the eyelid, read the smallest row of optotypes, and then repeat with the other eye. You can run our free practice screener directly in your browser.