Sam foster inventor biography

The first sunglasses were invented sometime in 12th century China. They were a crude slab of smoked quartz that was made to block out the light from the sun.

The primitive frames were roughly shaped frame to hold them against the user's face.

BiographySam Foster was an Austrian immigrant who brought the idea of this eyewear to the United States in the early s.

These darkened lenses, made only for the very rich, were not vision-corrected, nor they protect against harmful UV rays, but they provided some relief from having the bright sun constantly shining into user's eyes and were also used to hide emotions from others when speaking with them.

This was particularly handy for Chinese judges of that time who had routinely worn smoke-colored quartz lenses allowing them to see emotionally detached from the topic being discussed and to conceal their feelings while questioning the accused.

Around 1430 vision-correcting eyeglasses were darkened and they were introduced into Italy via the Chinese.

In the 18th century James Ayscough began experimenting with tin