I have the maximum prisms that my glasses can support. I find it comical to see that double line of cars coming from the left all try to squeze into single file as it approaches me. So far I have not tryied to drive between them. It c is a real challenge to drive with the double vision. Fortunately the double vision does not occur when looking straight ahead. Aww whats a person to do. I quess i will go look for more pennies. Dale Severance 59/13