Aviator sunglasses are characterized by their large tear-drop lens. The generally come in a thin frame. Pilots and police still love this style of glasses. Now many young people are wearing them too. They were first made by Ray-Ban in the 1930's. General MacArthur famously wore them when he arrived in the Philippines in WWII.
Now many designers have gotten into Aviator glasses. Prada makes some contemporary aviator glasses. Gucci also makes aviator glasses. The Gucci models look more like the classic sunglasses. Whether you want a classic style or an update aviator, a designer is sure to make them.