What is the difference between shades, sunglasses, goggles, glares and aviators?

Shades: Have you heard of the word shade? It's someplace that protects you from sun, maybe dust and some light rain too. That's what they exactly are, they called that because they are eyewear that give you "shade" from the sun, wind, dust etc. They're not fancy ones, just a pair that will do the act of shielding. They are generally tinted a darker colour, hence the name.

Sunglasses: If you've ever been to the mall, the sales person would've asked you to wear a pair of sunglasses with Polaroid coating and such and then shown an image to show the genuineness of the product. THOSE are sunglasses, the ones with Polaroid coating, UV filter.

Goggles: You see the industrial workers, swimmers, construction workers etc cover their eyes with a pair of bulky eyewear? Those are goggles. Meant for more heavy duty stuff that your regular sun protection. 

Glares: Same as sun glasses. Polaroid/UV coated eyewear to cut the glare of the sun in your eyes

Aviators: n 1937, the eyewear company Ray-Ban developed a style of sunglasses known as aviator sunglasses, or “aviators” for short. They are characterized by their thin wire frames, often black or gold in color, and large dark lenses that are approximately three times larger than the average human eye socket. Some versions actually have reflective lenses instead of simply having dark lenses.

Another traditional feature of aviator sunglasses is their bulging lenses. While traditional glasses and sunglasses are fitted with flat lenses, aviators have lenses that bulge outward slightly. This design allows for maximum coverage of the eye area.

The original aviators were designed to mimic the flying goggles that Ray-Ban sold to the Navy and the Army.

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