Dear ninikie,
It is possible that you may have astigmatism, or an oval shaped cornea. This causes
doubleDouble-tussin dm and distortion. I would recommend that you report these symptoms to your eyeMD and ask to be evaluated to determine the cause.
Dr. Feldman
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California