Assertion: macular degeneration's stage | /r/DefinedAs | the number and size of drusen
Facets:
value: beneath the retina
type: LOCATION
value: partially
type: DEGREE
Source sentences:
text: These stages are defined by the number and size of drusen in the retina.
text: AMD has three stages, partially defined by the size and number of drusen beneath the retina.