Assertion: glaucoma | /r/HasProperty | difficult to detect
Facets:
value: truly
type: OTHER
Source sentences:
text: Chen explains that until now, glaucoma has been difficult to detect in its early stages.
text: Chen explains that until now, glaucoma has been difficult to detect in its early stages.
text: Because the brain is correcting or filling-in the blind spots, glaucoma is truly difficult to detect.