The signs and symptoms of glaucoma vary depending on the type and stage of your condition. For example:
Patchy blind spots in your side (peripheral) or central vision, frequently in both eyes
Tunnel vision in the advanced stages
Acute angle-closure glaucoma
Nausea and vomiting
Halos around lights
If left untreated, glaucoma will eventually cause blindness. Even with treatment, about 15 percent of people with glaucoma become blind in at least one eye within 20 years.
When to see a doctor
Seek immediate medical care
Promptly go to an emergency room or an eye doctor's (ophthalmologist's) office if you experience some of the symptoms of acute angle-closure glaucoma, such as severe headache, eye pain and blurred vision.
Schedule eye exams
Open-angle glaucoma gives few warning signs until permanent damage has already occurred. Regular eye exams are the key to detecting glaucoma early enough to successfully slow or prevent vision loss.
The American Academy of Ophthalmology recommends glaucoma screening:
Every four years beginning at age 40 if you don't have any glaucoma risk factors
Every two years if you're at high risk or over 65.