I was recently sent these images of my goggles in their pre-welded state. I think you’ll agree that they look simply gorgeous as they are!The lenses are camera filters. Just the cheap UV versions that you can now get second-hand from camera shops that have a second-hand section or car boot sales. The reason I chose filters was because of the welding. I decided that the extreme temperatures may melt traditional plastic welding lenses whereas the camera filters have a metal ring around the circumference which should offer enough protection.
The fork has a small bend in the prong which is to attach the two goggles together in the middle. Something I nearly forgot!
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Steampunk Journal 
You should check out The Makeshift Gallery (http://www.makeshiftaccessories.com/) if you like stuff made out of reclaimed silverware and other metal. They have a location in my hometown and they have amazing stuff! I buy gears there sometimes to make my own steampunk stuff, which I sometimes post on my blog, http://www.ForWhomTheGearTurns.com. Cheers!