During an eye examination, the pressure inside the eye is taken. An ophthalmoscope is used to examine the back of the eye to ensure the health of the optic nerve and to look for possible damage.

Several other risk factors are a consideration in developing glaucoma, including a family history of glaucoma and general health problems such as diabetes, anemia, or hardening of the arteries.

It is important to understand that while treatment and surgery can usually prevent further vision loss, there is no way to restore vision already lost due to glaucoma.