These metal-frame shield Khan-brand men's aviator sunglasses might look different, but they're every bit as cool as the shades we have seen in the past. The older styles of aviators have larger lenses than these sunglasses. The difference in lens size is made up by the absence of the metal piece that separates each of the lenses. When there's this space, the wearer has to deal with sunlight leaking in. The presence of unnecessary sunlight can hinder the enjoyment a person might have on their trip. Being able to have all of your face protected from sunlight is good for everyone involved.