then after the tunnel vision went away, l got a migrain so bad l vomited. What could it have been?

eyes do that stuff sometimes
but it your worried go to the eye docter

That is the ocular component of the migraine. We do not really know exactly what causes it, but it is thought to be a vascular or neurological shift that causes the eye/brain to perceive hallucinatory images. Many people experience this even without a headache. It generally lasts under an hour and in some cases only for a few minutes. It is generally harmless, just annoying.

see:

http://allaboutvision.com/conditions/ocular-migraine.htm

thoose r the common warning symptoms of a migrane.if this ever happens agin, take alieve and get 2 bed with a cold caffine beverge.ifeel your pain.thats happened 2 me b4.it may have been caused by aspratame.make sure your caffine beveage is not diet.and seee your doctor

Wow, this question made me happy.well not happy..just relieved to know that there are other people with similiar symyptoms. l have those blue dots when l blink one eye. l also expereince tunnel vision and l see light streaks all the time. Its scary.