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Polarized sunglasses - what they actually do

Polarized sunglasses - what they actually do

The polarized or polarized lenses eliminate reflections from bright light, better than any other lens sunglasses.
How polarized glasses work:
The intense light reflected from our various surfaces produces glare and major discomfort. This light enters our eyes from different angles than the normal light…

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SUNGLASSES HISTORY

SUNGLASSES HISTORY

First sunglasses
In China, sunglasses were used in the 12th century or possible earlier. These sunglasses were made out of lenses that were flat panes of smoky quartz. They offered no corrective powers nor they protect from harmful UV rays but did protect the eyes from glare. Ancient documents describe the use of such crystal sunglasses by judges in ancient Chinese courts to hide their facial expression when they interrogated witnesses.

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