New Bausch & Lomb Dual Lens Folding Magnifier. This is a new Bausch & Lomb dual lens folding pocket magnifier. It has 2 optical quality glass lenses. It magnifies 3X and 4X or 7X when combined. The lenses fold easily into a protective case for easy storage. It is great for hobbies and crafts, such as model building, coin and stamp collecting and sewing. Each lens measures approximately 1 9/16" (40 mm) in diameter.