How do I change the lenses on my Smith PivLock glasses? Smith PivLock is an interchangeable lens systems that allows for quick lens swaps to match changing light conditions. Read about changing PivLock lenses in the Smith blog. Have more questions? Submit A Request Related articles How do I change the lenses on my goggles? Warranty Policy How do I learn more about Smith sunglass technologies? How do I choose the right lens for the light condition? Does Smith offer light-responsive (photochromic) lenses?