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To remove the lens, grip the frame from the back. With both hands, gently pull the top up and the bottom down simultaneously. The slight flex will loosen the lens.

With the frame still flexed, use your thumbs to press the lens evenly from the inside until it releases. Audible clicks are normal as the lens disengages from the groove.

To install, begin by fitting the top nose-edge of the LifeArt lens into the groove. Then, firmly press the rest of the lens into place with your thumbs, working around the frame until it's fully and evenly seated.

To complete the installation, press firmly and evenly around the entire lens perimeter with your thumbs. This final step ensures the lens achieves a secure, even seat within the frame groove.