"Sunglasses" for the Color Blind

"EnChroma will be demonstrating several new sunglass lenses aimed at helping the color blind," writes Discovery. Its "lenses are formulated for the one in 20 males worldwide with either deuteranomalous or protanomalous color vision deficiency; the Cx-D lens addresses deuteranomalous (red-green) color blindedness and Cx-PT tackles protanomalous (red-lacking). These filters represent the first non-haploscopic solution -- allowing the same color perception by each eye -- to provide an effective correction for color blindedness. Constructed with over 100 layers of nano-thin, but durable, metal-oxide coatings applied to the surface of a chemically tempered ultra-thin glass substrate, these lenses selectively reduce exact light wavelengths responsible for the color confusion." Read more.