The Clarity Reading Full Page magnifying glass is a first quality fresnel lens magnifier, that has crystal clear optics. Variable Focus: Move the lens away from the reading material and increase power.Lens Size: 8.5"x10.5"Lens Power: 2X Up To 4X (8 diopters) Comes with mounted lens, LED light and metal book stand.Do not confuse the Clarity Full Page Magnifying Glass with inexpensive magnifying sheets. The lens of the fresnel magnifier is first quality acrylic, that lets you view a bright clear and sharper image.