Hold the frame and gently press the lens until it pops out. Store the removed lens in the provided pouch. Insert the new lens, aligning the raised bumps with the grooves in the frame. Ensure the mirror bend lines are parallel; adjust by rotating the lens if necessary. Wiggle the nose bridge gently to confirm the lens bumps are properly seated. Test – if the mirror looks blurry, realign the bumps into the correct groove.