No: The defects occur after the increase pressure in your eye causes permanent damage to your vision. Usually you lose the peripheral vision. When it is bad you feel like looking through a tunnel when your peripheral vision is gone.
Answered 1/15/2015
5.8k views
Not always: Some glaucoma patients display damage to the optic nerve inside the eye before the visual field is affected.
Answered 3/26/2013
5.4k views
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