When the sun shines at the sear or any other reflective or partially reflective surface, the reflected light becomes polarized.  This means that most but not all the light waves move in one plane.  Polarized lenses allow only light in one plane to pass through the lens.  Therefore, by using Polarized Safety Glasses while lounging at the beach, you can eliminate much of the glare from the sea.  Also, when you’re driving along the coast when the sun is going down, the sun’s blinding light naturally bounces onto your windshield and at times completely blocks your vision from the cars in front of you.  This could potentially cause you an accident.  Although sunglasses do aid in blocking out some reflective glare, they do not reduce as much reflective glare as do Polarized Safety Glasses.

Therefore, you can be sure to count on Polarized Safety Glasses to reduce most reflective glare, and this will in turn reduce eyestrain and provide extreme impact resistance.  Also when you’re working outdoors next to a building where there are mirror windows, it creates a blinding flash.  This also happens frequently with windshields and chrome wheels on cars.  It is advisable to wear Polarized Glasses while driving to prevent polarized light from blocking your vision.  It eliminates eye stress and fatigue from any surfaces that create glare ranging from sunlight, water, sand, and glass to chrome from automobiles or buildings.  Keep in mind that this glare reduction does not sacrifice clarity, performance, or durability.  Polarized Safety Glasses provide excellent optical quality and 100% UV protection.  These glasses also offer maximum all-day comfort, enhance clarity, definition, and color transmission.  Most importantly, all of our polarized safety glasses meet or exceed ANSI Z87.1-2003 standards

	FEATURES	BENEFITS
1	Polarized, polycarbonate lens	Reduces all reflective glare, which reduces eyestrain and provides impact resistance.
2	Soft, rubber nosepiece	Offers maximum all-day comfort
3	Rubber-tipped temples	Keeps glass securely in place
	Lens eliminate horizontally reflected glare	Enhances clarity, definition, and color transmission.
	Two layers of polycarbonate with polarization filter laminated in center	Excellent optical quality, 100% UV protection and extreme impact resistance.
	Includes neck cord and carrying bag	Protects glass from scratches and conveniently hangs glass around neck.

Although the light from the sun is not polarized, it can be separated into two polarized components that are reflected and transmitted in different amounts by the surface of the water.  More of the horizontal component will be reflected than the vertical component, thus partially polarizing the reflected light.  in order to eliminate the glare we would use a lens that is vertically polarized.

If we polarized a lens both horizontally and vetically, it would not transmit any light.

Maximum polarization is obtained when the sun is about 37 degree from the horizon.  If the sun (or other light source) is very low or very high the sunglasses will be of limited help in filtering the glare. 

When you drive a car, you will experience reflections from the road, from the engine hood and other vehicles.  As long as those reflections are incoming between the angles of 30-60 degrees, you will benefit from the polarized glasses.

Polarized safety glasses lenses effectively eliminate horizontally reflected glare and the sun's harmful ultraviolet rays.  This results in greater clarity, definition, brilliant color transmission and reduced eye strain.  These polarized lenses are made from two layers of polycarbonate with the polarization filter laminated in the center.  These lenses have excellent optical quality, provide 100% UV protection, and offer extreme impact resistance. 

The above information was provided by Elvex Safety.