This is the website about the history of other types of sun goggles/glasses.

Drewry, R. (2007) History of Eye Glasses. Retrieved November 29, 2010, from http://www.teagleoptometry.com/history.htm

this web site is about the history of eye glasses from B.C.E. till today. The author of the web page is an optometrist and has studied the topic for a while. He goes from the water filled stones in the midievil ages till the contact lenses that a lot of people are wearing now. the information includes a few pictures as well as information on the emerald sunglasses which i found use full.