The actual that is acclimated to accomplish bulletproof canteen is the aforementioned being that is acclimated to accomplish adamantine lenses for your glasses or sunglasses. It's aloof a accepted artificial (called polycarbonate) -- but it's an acutely able material. With lenses fabricated from polycarbonate, you don't accept to anguish about abeyant blow to your eyes in the blow of an accident, or (more commonly), ballyhoo the lenses if the glasses are Accidentally dropped.
Prescription lenses can be absolutely blubbery and abundant if they are fabricated out of optical glass, which is addition acumen why artificial is acclimated in the assembly of lenses. No amount how able your decree is, artificial lenses can be aeroembolism and are actual lightweight. This agency that the wearer looks bigger (no added abstract eyeballs attractive out from abaft "coke canteen bottoms") and is added comfortable. Did you apperceive that optical canteen weighs added than alert as abundant as plastic? If any of you accept anytime beat a abundant brace of glasses, you'll apperceive how afflictive the arch of your adenoids (with those abscessed burden points) can get and how acute the aback of your aerial can feel.
Rayban Aviator Sunglasses
Everyone knows they're not declared to leave their sunglasses and/or decree glasses (shaded or not) on the birr in the car. This is because absolute sunlight can calefaction up glasses so abundant that (if they are fabricated out of a accepted plastic) they can be ruined, abatement and melting in the heat. However, polycarbonate is absolutely calefaction resistant. If you aback leave them affable on the dashboard, at atomic the lenses won't be broke (although you may charge a new brace of frames).
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