Fresnel Lens, 1 Each

The Fresnel Lens by United Scientific is a flat, card-style magnifier with a 3 1/8" x 1 3/4" magnifying window and 1.25x magnification, supplied in a protective vinyl sleeve measuring 3 3/8" x 2 1/4". Teachers use it to demonstrate how a grooved Fresnel lens bends light like a thicker lens, and students use it as a pocket reading magnifier in optics and general science classes.