What are the symptoms of glaucoma?
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Normal vision (top). Vision affected by glaucoma (bottom).
At first, open-angle glaucoma has no symptoms. It causes no pain. Vision stays normal.
As glaucoma remains untreated, people may miss objects to the side and out of the corner of their eye. Without treatment, people with glaucoma will slowly lose their peripheral (side) vision. They seem to be looking through a tunnel. Over time, straight-ahead vision may decrease until no vision remains. Glaucoma can develop in one or both eyes