Thank You. Yesterday, I Got Sudden Blurry Vision, But Only

Thank you. yesterday, I got sudden blurry vision, but only on the outside , if you will, of my eye. Not the entire vision portion, just the edges..blurry like looking thru waves in water...
Headache at the same time. Lasted a while...maybe about 30 minutes or so. This is the 3rd in the 12 months this has happened.