Assertion: glaucoma's symptom | /r/HasProperty | gradual
Facets:
value: usually
type: DEGREE
Source sentences:
text: The condition develops slowly over a lifetime, and symptoms are gradual and often go unnoticed.
text: The only symptom is gradual vision loss, which can occur without glaucoma being a factor.
text: Its symptoms are usually gradual and you may not notice any vision loss unless in the advanced stages.