Table 1.
Group |
Description |
0 | |
a | No signs |
b | Few hard drusen (<63 μm) |
1 | |
a | Soft distinct (>63 μm) |
b | Pigment irregularities only (no soft drusen) |
2 | |
a | Soft indistinct drusen (>125 μm) |
b | Soft distinct drusen (>63 μm) and pigment irregularities |
3 | Soft indistinct drusen (>125 μm) and pigment irregularities |
4 | |
a | GA |
b | CNV |
c | GA and CNV |
Early-stage AMD includes Groups 0b, 1, 2, and 3, whereas late stage is Group 4.