Bella Black & White + Purple Lens by Diff Eyewear. Whether you're at the beach, in the break room, or on a boat, the Bella creates the perfect angle for any selfie. This oversized frame, bold lenses and metal temples creates a dramatic compliment to your every day wardrobe. Diff Charitable eyewear is built on the principle that the designer eyewear should be affordable, fashionable, and socially conscious. Diffs “Buy a Pair, Give a Pair” promise ensures that for every pair of Diff sunglasses purchased, a pair of reading glasses is donated to someone in need.