Aviator sunglasses are originally designed especially for pilots, it needs to be worn under a flight helmet. Its slightly convex lenses effectively increase the field of view and reduce the amount of light projected. Nowadays it is more commonly used as a popular trendy sunglasses accessory.
As design years, aviator sunglasses have been a long time, but this does not affect its popularity in any way, this classic shape but increasingly trendy. You can see travelers or celebrities wearing aviator sunglasses almost anywhere.