Every humans beings find difficult from the direct rays and brightness from the sunlight in such cases like riding, reading in the direct rays, etc. sun can neither decrease the heat nor protects yours eyes. so that, glasses are made for the protection of our snacked eyes through the ultra violet radiations that led to serious injury of eyes.
Actually peoples thinks that the glasses are wearied for looking themselves smarts and handsome through followings the paths of their films actors, these days glasses are worn by almost every peoples and became a necessary fashion in every aspects of our life.
Glasses are available in cheap so that we can afford it in a most convenient ways, every glasses are made in different size and shapes, this is because of different quality as well as brand, no matter whatever it costs but some lenses are thinner than that of a perfects lenses which allow the ultra violet rays to reflects and indeed infects the snacked eyes.
Thousands of sunglasses companies products sunglasses of different types, while purchasing everyone should know the instruction, because some may make fool by just fixing the lenses thinner and made from plastics which allow the ultra rays to reflects instead of blocking it, the gray color sunglasses is the bests and perfects for protect the rays.