New or old?: Severe headaches such as migraine can cause vision changes/blurry vision. Muscle/tendon/cervical spine problems can cause neck pain which can trigger headaches/migraines. If this has been ongoing for long time, i suspect cervical disc/muscle problems to cause headaches etc..If this is sudden/new, carotid-disection (bleeding into wall of vessel) and cause your symptoms. Consult doc. Good luck.
Answered 3/30/2013
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