Head pain right side for 2 weeks leading up to severe pain above right eye causing loss of vision both eyes temporarily, left eye returned within 35 to 40 seconds right eye took several hours to focus. I have had a arterial biopsty of a vain in my right temple area. Results where normal CAT scan showed infection left side of head behind ear. MRI show same infection.. Blood test all normal. 3 weeks later still having head pain and trouble focusing after sharp pain in head.