http://www.shooting-glasses-guide.com/ May just be a promo-sales site, but looks like it has some information. I think to get good shooting glasses and sun glasses you will probably have to get a pair with interchangeable lenses or get two pair. Depends on where you shoot. I shoot mostly indoor so want clear lenses for that, as it is almost too dark to start with. if you shoot mostly outside then a tinted pair of shooting glasses may work as well for sunlight. One option is to go to an optometrist and buy a regular pair of safety glasses with optically neutral lenses. Not as stylish as the name brand shooting glasses but will provide good protection and good optics.