Table 1.

Classification of glaucomatous condition based on the narrowest rim-width or RDR using DDLS as recommended by Spaeth et al.¹⁵ and Henderer et al.¹⁶.

DDLS stage (Spaeth et al.7)	DDLS stage (Spaeth et al.15 and Henderer et al.16)	Rim-to-disc ratio (RDR) range	Glaucomatous condition
0 (0a and 0b)	1 and 2	0.30 ≤ RDR ≤ 0.50	Not definitely damaged (Normal)
1	3	0.20 < RDR ≤ 0.29
2	4	0.10 < RDR ≤ 0.19
3	5	0.01 < RDR 0.10	Asymptomatic glaucoma damage (Moderate)
4	6	No rim < 45°
5	7	No rim 45°–90°
6	8	No rim 90°–180°	Glaucomatous disease/disability (Severe)
7 (7a and 7b)	9 and 10	No rim < 180°

For comparison, the classification proposed by Spaeth et al.⁷ is also shown.