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To: JPG; Huntress

It’s a Fresnel Prism, used to help the wearer deal with double vision.


19 posted on 03/03/2014 3:42:50 AM PST by old and tired
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To: old and tired

Is that like “Beer goggles”?


44 posted on 03/03/2014 5:38:20 AM PST by Yorlik803 ( Church/Caboose in 2016)
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