These lightweight reading glasses filter the blue light emitted by computer, tablet, and smartphone screens to help prevent eye fatigue and discomfort. Only available from Hammacher Schlemmer, the glasses have magnified lenses that are infused with melanin, which enhances contrast while shielding against high-energy visible blue light that causes eyes to tire while reading on screen. These damaging blue rays can also lead to macular degeneration and cataracts, as well as insomnia. Made from lightweight, optical-quality, shatter-resistant polycarbonate, the protective glasses can be worn over prescription lenses or contacts. Black. Specify 1.25X, 1.5X, 2X, 2.5X. Not available for shipment to NY. 5 1/4" L x 1 1/4" H x 1 1/4" D. (4 oz.)