eyeglass

Eyeglass testing equipment turns out to test these!

Eyewear testing includes eyeglasses lens testing as well as glasses frame testing. These tests are typically done before glasses leave the factory: frame deformation; dimensional stability at high temperatures; resistance to perspiration; bridge deformation; frame endurance test; ignition test; frame measurements and dimensional tolerances; check markings; lens retention; instructions and warnings on packaging; and nickel testing (metals only).

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