Polarized Sunglasses are very popular in fishing and watersports. It is useful in fishing and watersports because they help a lot by reducing the suns glare and its blinding effect. Even without glare, sunglasses also selectively reduce other reflections from objects above water, including clouds and even the sky. Check this link right here http://typhoonoptics.com/ for more information on Polarized Sunglasses. Polarized sunglasses also make the water seem darker but more transparent if you look at it from an angle but not straight down.
