Well, I know not so cheap sunglasses but have a great technology in lenses.?but if you are looking for good glasses and good lenses, I advise "oakley". there are many very good lensesused worldwide by athletes in multiple sports. All Oakley polarized sun reach 99.9% efficiency embloquear polarized light waves.
I think famous brand sunglasses have good lenses but they are very expensive. So I suggest you to buy a pair of cheap sunglasses online. It will cost you about $100 or less than $100. But they also have good quality. Choose those sunglasses that can block 100% UV rays because they can better protect your eyes and prevent some eye disease from happening when you get older.
Can you tell us how much you plan to spend on the sunglasses? If you want to spend less than $100 on them, you can have a look at http://www.firmoo.com/wrap-around-rx-sunglasses.html. All of the sunglasses are with UV protection. Hope this helped!
Best sunglasses with affordable prices? I think there are many fake sunglasses and many good sunglasses. But most of us don't know how to choose a pair of sunglasses. We will believe what the salesman told us. But actually some salesman lies to us. So we have to know some basic knowledge about sunglasses and then ask the salesman to prove us that their products are of good quality. Some big eyeglasses stores can test the lenses of the sunglasses to see whether they can block UV rays or not. The polarized sunglasses will turn black when we move them from upside down in front of the brightly lit TV screen.