Polarization

Polarized lenses are recommended for many outdoor activities, especially fishing, kayaking, boating or any other activity where you want to eliminate the glare from a reflective surface.
Glare results from light rays hitting your eye from several directions simultaneously, as when the sun’s rays are reflected off of a body of water.  While tinted lenses block a percentage of all light from reaching the eye, polarization fulfills a more specialized function, by specifically filtering out reflected light. 
When light reflects off an object it usually changes its orientation, and is therefore not in sync with the primary light source.  Polarized lenses block the reflected rays by allowing only light traveling on one plane to pass through the lens.  What reaches your eye is the light from the primary light source.  The result of this is glare elimination that does not depend on the tint of the lens: Polarized lenses can eliminate reflected glare more effectively than regular lenses without having to be as dark.  The benefits of this will be explained below. 
Polarized lenses are crucial to fisherman not just because they minimize eye fatigue by reducing glare, but also because they eliminate the “mirror effect,” transforming the water’s surface from a “mirror” that reflects light into a “pane of glass” which they can look through.  This allows the fisherman to see the fish and rocks beneath the surface.  To illustrate the above point, try looking at a body of water on a bright day, or at the windshield of a car in a parking lot.  The external light source naturally causes the surface of the water or window to act as mirror.  Now put on your Numa polarized eyewear, and that mirror becomes as translucent as a pane of glass.  Now you can see the rocks and fish beneath the water’s surface, or the inside of the car in the parking lot example. 

Our Low-Light Yellow Polarized lenses were designed to filter out only a small percentage of visible light while still blocking out reflected light rays, thus allowing the user to see beneath the water’s surface even in poor-light conditions (i.e.- when it is too dark to use the Smoke polarized lenses).

Numa Polarized Lens Options:  Smoke, Low-Light Yellow