Every month or so, I get these weird pains in my eyes, and when the pain resides, my vision is blurry; I cannot make out anything I look at. After awhile, the blurriness goes away and everything is fine. What could this possibly be? I have experienced this since I was about 13 (now 29). Eye doctor doesn't know, don't think he cares either, though. Any ideas??

What is your blood pressure like? High? Low? Normal?

This could also be a type of a migraine headache.

Pretty normal... I smoke, heavily, but at 13 I didn't... I do get cluster headaches on odd numbered years, but they don't feel like that.

Sounds like ophthalmic migraine