Hi Dale S., I understand your eye problem in looking left and seeing a double line of cars. My problem also. My solution is to close the left eye when looking for traffic from the left. Cars then appear in their correct lanes and I feel confident that what I see is what is really there. No problems when looking forward or to the right. My ophthalmologist gave me an eye test and found that part of the eight muscles that operate the eye were not functioning properly. He contributed the fault to PD. Good luck, Bob Baker 74/4