Level 10	No drusen of any type or hard drusen or small soft drusen (<125 μm in diameter) only, regardless of area of involvement, and no pigmentary abnormality (increased retinal pigment or RPE depigmentation) present
Level 20	Hard drusen or small soft drusen (<125 μm in diameter), regardless of area of involvement, with increased retinal pigment present but no RPE depigmentation present or soft drusen (≥ 125 μm in diameter) with drusen area <196,350 μm2 (equivalent to a circle with a diameter of 500 μm) and no pigmentary abnormalities present
Level 30	Soft drusen (≥ 125 μm in diameter) with drusen area <196,350 μm2 and RPE depigmentation present or soft drusen (≥ 125 μm in diameter) with drusen area ≥196,350 μm2 with or without increased retinal pigment but no RPE depigmentation present
Level 40	Soft drusen (≥ 125 μm in diameter) with drusen area (≥ 196,350 μm2 involvement and RPE depigmentation present with or without increased retinal pigment
Level 50	Pure geographic atrophy in absence of exudative macular degeneration
Level 60	Exudative macular degeneration with or without geographic atrophy present