I fish a lot, and it's fairly easy to find "fishing specific" glasses for 2 for 5 bucks etc at times, in this case the glasses are polarized to help you see your line sitting on the water better. I honestly think I prefer them as I don't have to worry about my precious glasses cases etc.. if lost it's an oh well moment. My smart phone is my bike computer and usually resides in my jersey pocket as in ride stats do not concern me. Just my experiences.