Even though sunglasses are considered one of the hottest accessory, they are the ultimate way to prevent our eyes from radiation found in sunlight. Not only being reserved for summer, they protect the eyes while sunbathing, driving a car or skiing (for better protection choose polarised sunglasses). Technically, most opticians point on green, gray or gradient UV protected lenses (UVA + UVB) and on the other hand they advise to avoid the blue ones.
According to the latest summer 2010 trends, oversized glasses are continuously en vogue (see: Mariah Carey). This is actually where fashion meets usability as they are both terribly stylish and they also protect whole area around the eyes. Featured in: Cole Haan, Betsey Johnson, Marc by Marc Jacobs.
Classically framed sunglasses (especially wayfarer sunglasses) are coming back with their iconic, rock and roll attitude. They look serious but end up a little fun. Plus they are simply beloved by A-listers who most commonly choose the blue framed (see: Katy Perry) or rounded ones (see: Lady Gaga). Featured in: Ray-Ban, AJ Morgan.