For those people who have to work in different working environments, just one pair of glasses frames is far from enough. Usually, having your eyes checked every year and getting three pairs of glasses ready is a good choice: a work pair, a backup/home pair, and designer sunglasses like Louis Vuitton sunglasses and Chanel sunglasses are not bad options either. You may also want a pair for workout/sportswear eyewear, like Ray-Ban glasses. By now, the Louis Vuitton sunglasses I bought in 2008 are still working great. And one year later, I got my first Cartier glasses frame from an online eyewear store. It’s not real but has good quality. Most importantly, it's much cheaper than real Cartier eyeglasses frames, and just from the look, you can’t tell the difference. My Louis Vuitton Sunglasses and Cartier Glasses Frame are still in great condition, so I’m keeping those and just replacing the lenses. However, my backup pair is finished...so I need a new backup/home pair. Since my eyesight is so poor, I have to get High-Index lenses and also anti-reflection. So the doctor recommended solid but lightweight glasses frames like Nikon glasses frames, Seiko Eyewear frames, and OGA glasses. I am going to the online eyewear frame store again and considering which one I should buy.