...trouble seeing in one or both eyes; sudden trouble walking, dizziness, loss of balance or confusion; and a sudden severe headache with no known cause. Call 911 immediately if any of these warning signs occur, even if they last only a short...

...or legs, difficulty speaking or understanding speech, sudden dimness of vision or loss of vision in one eye, sudden severe headache, dizziness or loss of balance. High blood pressure, high cholesterol, being overweight and family history...