Assertion: lens's state | /r/HasProperty | due
Facets:
value: to remove a cataractous lens
type: CAUSE
value: usually
type: DEGREE
value: to surgery
type: CAUSE
Source sentences:
text: The aphakic state is usually due to surgery to remove a cataractous lens, but post-surgical aphakia is rare nowadays because of the ubiquity of intraocular lenses.