| DDLS Stage | NW for Small Disc (<1.50 mm) | NW for Average Size Disc (1.50-2.00 mm) | NW for Large Disc (>2.00 mm) | Functional damage |
|---|---|---|---|---|
| 1 | 0.5 or more | 0.4 or more | 0.3 or more | Not definitely damaged |
| 2 | 0.4 to 0.49 | 0.3 to 0.39 | 0.2 to 0.29 | Not definitely damaged |
| 3 | 0.3 to 0.39 | 0.2 to 0.29 | 0.1 to 0.19 | Not definitely damaged |
| 4 | 0.2 to 0.29 | 0.1 to 0.19 | Less than 0.1 | Not definitely damaged |
| 5 | 0.1 to 0.19 | Less than 0.1 | 0 for less than 45° | Asymptomatic glaucoma damage, minimal visual field defect or none |
| 6 | Less than 0.1 | 0 for less than 45° | 0 for 46° to 90° | Asymptomatic glaucoma damage, visual field defect always present |
| 7 | 0 for less than 45° | 0 for 46° to 90° | 0 for 91° to 180° | Asymptomatic glaucoma damage, moderate or more advanced visual field defect |
| 8 | 0 for 46° to 90° | 0 for 91° to 180° | 0 for 181° to 270° | Glaucomatous disease/disability |
| 9 | 0 for 91° to 180° | 0 for 181° to 270° | 0 for more than 270° | Glaucomatous disease/disability |
| 10 | 0 for more than 180° | 0 for more than 270° | Glaucomatous disease/disability |
Disc Damage Likelyhood Scale (DDLS)
- compiled & published by Dr Dhaval Patel MD AIIMS
