3 Pc Clip-On Magnifying Lens for Reading Glasses. Powers: 1.5X, 2.5X, & 3.5X. Acrylic Lens. Clamp-On Adjustable Lens to Glasses (Glasses Not Included). Temporarily convert distance glasses or sunglasses into reading glasses. Spring clip attaches magnifying lenses to top of distance glasses lenses. Flip down for magnifying power, flip up for regular unobstructed vision. Great for all close work where quick magnification is needed-reading, fishing, hobbies, crafts, computer use, etc.