Although glaucoma can produce symptoms, the best way to detect the disease is by having regular eye examinations.
Vision is normal and there is no pain.
If the disease is not treated, however, vision becomes blurry and side vision is lost. It may appear that you are looking through a tunnel. Over time, your remaining forward vision may decrease until you have no vision left. If it occurs, you should seek immediate medical attention. In computerized visual field testing, you will be asked to push a button each time you see a flash of light.