Table 1. Age-related macular degeneration and its stages.

AMD: age-related macular degeneration

Stages	Characteristics
No AMD	No drusen, no AMD pigmentary abnormalities, and normal dark adaptations
Subclinical AMD	No drusen or small drusen, no AMD pigmentary abnormalities, and impaired dark adaptations
Early AMD	Small or medium drusen, AMD pigmentary abnormalities, and impaired dark adaptations
Intermediate AMD	One large druse, any AMD pigmentary abnormalities, and impaired dark adaptations
Advanced AMD	Geographic atrophy and neovascular AMD