"Blue Blocker Protection" doesn't simply protect the eyes for the long-term; it also affords immediate visual benefits, most notably cutting glare and enhancing contrast. Technically, glare relief is achieved by filtering the short-to-medium wavelengths of the visible spectrum (blue-green-yellow), which scatter within the opacities in the ocular media, and allowing only the longer wavelengths to reach the retina. UVShield "Blue-Blockers," including the amber, yellow, plum and orange filters, cut the glare from reflected surfaces (snow, water, sidewalks, windshields and store windows) and make for more comfortable experiences for both recreational activities, such as boating, fishing, golfing, and daily activities, including shopping, driving and working in the yard.
Contrast enhancement is also a function of the "Blue Blocker" effect of reducing the shorter wavelengths. "Blue Blockers" have the additional benefit of highlighting visual distinction and enhancing contrast, which makes for a more comfortable experience, whether for driving and reading street signs, or for enjoying the outdoors. Source: Blue Blockers http://www.noir-medical.com/about/blue_blocker.html
