I've been doing a lot of reading on who makes really high quality, optically clear sun glasses that are also good for riding motorcycles. Many of the inexpensive sunglasses have cheap acrylic acetate lenses that are not optically clear and may have a slight distortion. Polycarbonate lenses are stronger and more clear and cost a little more. You can also buy high quality glass lens for sport riding and driving. Any thoughts on who makes a really good quality, optically clear sunglasses for motorcycling with a helmet? Thanks, Jim / oldcarman