While driving, I experienced severe double vision. Put a tissue behind one lens of my eyeglasses so I could continue driving that day. Went to my optometrist who referred me to an ophthalmologist who told me I had ocular MG and I went back to my optometrist who put prisms in my eyeglasses and they Solved the problem. All of a sudden my double vision was gone and driving was not a problem. Prisms really helped me