PolaVisor II is a windshield glare screen designed for use by individuals with visual impairments who are still qualified to drive. The screen has a sensor-controlled anti-glare lens shade that changes with the strength of the sunlight as fast as within seven seconds. The lens reduces sunlight brightness up to 80 percent without dimming effect. It absorbs ultraviolet (UV) rays, enhances visual acuity, heightens vision contrast, and reduces eye strain and fatigue. The lens material is made of a mixed acrylic and rubber material which is shatter-proof, scratch resistant, and durable. The unit comes with adjustable clips with mounting straps and fits all cars, vans, trucks, SUV's, Class C RV's and campers, and pleasure boats. DIIMENSIONS (HxW): Lens is 4.5 x 15 inches.