Men's metal-pilot sunglasses block out uncomfortable glare and protect their eyes from it
Ultraviolet damage. All this is thanks to metal powder filters, which can "select" light as it comes in. Tinted glasses can selectively absorb some of the wavelengths that make up the sun's rays because of the fine metal powders (iron, copper, nickel, etc.). In fact, when light hits the lens, it is cut off, based on a process called "phase out interference." That is, when certain wavelengths of light (uva, uvb, and sometimes infrared) pass through the lens, they cancel each other out on the inside of the lens, in the direction of the eye. It is no accident that light waves overlap: the peaks of a wave collide with the valleys of the waves near them, causing them to cancel each other out. The elimination of interference depends on the refractive index (the degree to which light deviates from the air as it passes through different substances) and the thickness of the lens. Generally speaking, the thickness of the lens varies little, and the refractive index of the lens varies according to the chemical composition.
Men's metal aviator sunglasses offer another eye protection mechanism. The reflection light of asphalt road is special polarized light. The difference between this reflected light and the light coming directly from the sun or from any artificial light source is a matter of order. Polarized light is formed by waves that vibrate in one direction, while ordinary light is formed by waves that vibrate in the same direction. It is like a group of people who move in random disorder and a group of soldiers marching at a regular pace. In general, reflected light is an ordered light. Polarizing lenses are especially effective at blocking this light because their filters work.