Re: blurred vision, numb fingers, headache
I'm with Brian--sounds like migraine with aura. Do some reasearch on migraine and aura.
Apparently, some foods can trigger an attack. FYI, in my case, it's a bad back/neck, so finding the trigger can be difficult. If this is your first attack, you might want to go through the preceding 24 hours to look for anything suspicious, or stressful.