Can a pair of eyeglasses stop double vision on the left ?

I know it’s stupid but for around eight years I’ve had double vision when looking to the left. I thought it was just tiredness ; I didn’t notice it during the day. But this year it began happening at all times. So I went to two eye doctors the same day who work together: a D.O. (doctor of optometry) then his M.D. (opthamologist) who gave me a prescription for glasses. He said, “this should help.’ What the heck did that mean? I think they’ll cost a fortune if they’re for double vision so I haven’t filled the prescription yet. Will glasses stop the double vision? The eye chart was almost a piece of cake.