When looking for sunglasses, some people confuse the term polarised with the brand name "Polaroid".
The Polaroid brand
Polaroid is a multi-national corporation, owned by global eyewear distributor Stylemark, that was co-founded in 1937 by Edwin Land, who invented the first inexpensive filters capable of polarising light.
The first major application for this technology was in the manufacture of polarised sunglasses, where it was found to reduce significantly the sun's glare compared with standard lenses. Polarised sunglasses were soon being made by other leading eyewear brands such as Ray Ban.
Polarised clip on sunglasses
Today, quality polarised clip on sunglasses...