Our expert says:
Yes, I think you should at least get an eye examination by an optometrist or your GP - he can refer you to a (more expensive) opthalmologist if needed. This could also be a kind of headache called an icepick headache ( see http://headaches.about.com/od/otherheadpain/a/ice_picks.htm) and then it maybe useful to see a neurologist - the feeling on the arms could also point to a nerve irritation.
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