Severity

Mild

Few, small, Grade 1, Grade 1+, Grade 2+, 1-10 in number, less than 1 disc diameter

Moderate

Many, medium, Grade 2, Grade 3+, 11-30 in number

Severe

Too many to count, confluent, Grade 3, Grade 4, Grade 4+, 31+ in number

Location

Posterior pole

Zone 1, macula

Periphery

Outside Zone 1, i.e. Zone 2 and Zone 3

Layers

Preretinal, Intraretinal, Subretinal, Multilayer