The reasoning: definitions (WHO ICD‑11, presenting visual acuity in the better eye)
| Category | Visual acuity |
|---|---|
| Mild VI | < 6/12 to 6/18 |
| Moderate VI | < 6/18 to 6/60 |
| Severe VI | < 6/60 to 3/60 |
| Blindness | < 3/60 (or visual field < 10° around central fixation) |
Part 9 · Non-Communicable Diseases and Their Programmes
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| Category | Visual acuity |
|---|---|
| Mild VI | < 6/12 to 6/18 |
| Moderate VI | < 6/18 to 6/60 |
| Severe VI | < 6/60 to 3/60 |
| Blindness | < 3/60 (or visual field < 10° around central fixation) |
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