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[Rickabilly]

There are a few reasons for the clear lenses on both sides of the glass, there should be three clears in total, one on each side of the green glass and a third as a safety shield under the flip up lens, to guard against flying flux or scale when the lens is flipped up, so effectively to act as safety goggles or glasses when chipping slag, the lens on the front of green glass is to protect from spatter, and the clear lens on the back of the green lens protects the back of the green lens from spatter as well but primarily from impact as the green glass is very brittle and if the flipper is up and a large piece of flying debris from a grinder or a piece of large slag or chipping hammer fragment hits the lens from the back it will be easily broken.

Regards
Rick,

Laser eyes surgery, yes I'd definately give it a go if I was to end up with eyes that could shoot Laser beams, I mean how handy would that be?