While prescription sunglasses are available in a variety of frame shapes, including cat-eye, oval, rectangle, and hexagonal, most experts in the field suggest adhering to one law. Prescription lenses with high curvatures commonly distort light. Natural forces can cause the prescription sunglasses to bend slightly. It can, however, vary from person to person based on vision and functional requirements. Heavyglare provides the best collections of prescription sunglasses around the US at a great deal.