Well, generally speaking, both optometrists and ophthalmologists can be eye doctors to treat glaucoma. But on the other hand, for people with advanced glaucoma, an ophthalmologic glaucoma specialist may be perfect. Also, as we know that glaucoma actually is related to a group of diseases and it can cause damage to the optic nerve as a result of increased pressure within the eye. And also, a severe eye infection, injury, blocked blood vessels or inflammatory conditions of the eye can cause glaucoma in many cases, you need to pay more attention to it. To treat it, just go and see the ophthalmologists.