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| Type | Description | N | % |
|---|---|---|---|
| No AMD | No AMD or hard drusen only | 4671 | 87.4 |
| Early AMD | Soft drusen and/or pigmentary changes | 645 | 12.1 |
| Late AMD | Presence of either geographic atrophy or exudative macular degeneration | 28 | 0.5 |
| Total | 5344 | 100.0 |
AMD = age related macular degeneration
