Table 1.

Clinical classification of AMD based on phenotype characteristics

Classification	Characteristics
No abnormal findings	No aging changes: • Absence of drusen • No pigmentary abnormalities
	Normal aging changes: • Drupelets only (small drusen ≤63 µm) • No pigmentary abnormalities
Early AMD	• Medium-sized drusen >63 µm and ≤125 µm • No pigmentary abnormalities
Intermediate AMD	• Large drusen >125 µm and/or pigmentary abnormalities
Late AMD	• Neovascular AMD and/or any geographic atrophy

Abbreviation: AMD, age-related macular degeneration.