What Causes Blurred Vision, Headaches And Right-sided Numbness In The Hand And Face?

My wife is 50 years old last 3 days has had blurry vision followed by bad headaches. took her to family Physician yester day, he sent her to optomitist to have vision test. everything was good with vision. the episodes seem better if she lays down. they drew blood for bloodwork this morning and she had an episode there at office but it was over in about 10 min. but on the way home from work she had a burning headache on the right side top of head followed by numbness in right hand and arm and face. she said her heart felt like it was beating harder than ever before the vision is describe aura vision