One rare type of glaucoma does have symptoms
. If you have sudden blurred vision, eye pain, rainbow haloes around lights, headache with nausea or vomiting, see an ophthalmologist immediately. Those are signs of angle-closure glaucoma and it needs to be treated right away to prevent rapid vision loss from very high intraocular pressure. As with many eye diseases, what you don't know about glaucoma could hurt you. So get regular medical eye exams. Don't let the thief of sight sneak up on you.