Polarization and Eyes
See also: Polarization (waves)Visible light waves from the sun travel in all directions. When this scattered light meets a horizontal surface, like a road or water, a large portion of the light is reflected with horizontal polarization. This horizontally-polarized light is seen as white glare, and masks light that is useful to the human eye, reducing visibility. By using a sheet of vertical polarizing material, the horizontally-polarized component can be significantly attenuated, reducing the overall light level reaching the eye. This improves contrast, and thus perception of the scene.
Read more about this topic: Polaroid Eyewear
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“A lady with soft eyes like funeral tapers,
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And a sad mouth, that fear made tremulous
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To two old eagles, full of ancient pride....”
—William Butler Yeats (1865–1939)