There are many possible reasons for seeing double such as a large disparity in the glass prescription between the two eyes, a muscle imbalance, a wrong prescription, or a number of other causes. I would definitely have the glasses rechecked.
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California
The P.D. in the new glasses was way off, 8mm as I recall. Hopefully all will be OK with the new pair.