Assertion: glaucoma's condition | /r/Causes | symptom
Facets:
Source sentences:
text: This is because an unaffected eye can 'fill in' for the other, the detailed central vision is not affected until a late stage and because people wrongly assume that the reduction in their vision is simply due to age, although the underlying condition may cause symptoms that require attention leading to the detection of the secondary angle closure glaucoma.