An inventer by the name of Edwin Land invented a cellophane like polarizing filter made in 1929.
Impact on History:The polarizing celluidbecame a critical element in creating polarizing sunglasses lenses that reduces light glare. http://inventors.about.com/od/gstartinventions/a/glass_3.htm
A glasses designer by the name of james Ayscough dessign the first spectical with double hindged side pieces.
Impact on history: Its oringinal purpose wwas not to shelid the human eye from the sun but was corrected for vision problems http://inventors.about.com/od/gstartinventions/a/glass_3.htm
The first vision aid was invented called the reading stone. It was a glass sphere that magnify when laid on top of reading material.
Impact On History: It was the first aid in time to help the human eye be able to see things more clear. http://inventors.about.com/od/mstartinventions/a/microscopes.htm
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