Convert dioptres, Visus and percentage
Enter a value and convert it between dioptres, Visus (decimal) and percentage. Visus and percentage convert exactly: 0.7 Visus is 70 percent. Dioptres describe a lens prescription, not sharpness, so a dioptre value can only be approximated.
Your converted value will appear here.
Common values
| Visus | Percentage | Meaning |
|---|---|---|
| 1.0 | 100% | Full visual acuity |
| 0.8 | 80% | Good vision |
| 0.7 | 70% | Minimum for a class B licence (both eyes) |
| 0.5 | 50% | Reduced vision |
| 0.3 | 30% | Poor vision |
| 0.1 | 10% | Very poor vision |
For guidance only — not medical advice. For an official result, take the eye test at a certified optician.