Multifocal Bifocal Reading Glasses Men's Adjustable Vision Sun Photochromic Outdoor Sports Presbyopic Magnifying Sunglasses

Product DescriptionPhotochromic lenses are also referred to as light-sensitive lenses". Glass lenses are adding silver halide, but now is the mainstream of photochromic resin lenses, adding of spiro and other chemicals in the acrylic resin lens, so that the original colorless and transparent lenses, in bright light, will become colored lenses, to do the protection, so is suitable for indoor and outdoor use.
Indoor clear lens
cloudy light grey lenses
Sunny dark grey lenses
bifocal reading glasses, the upper optical area of the lens is used for the far view, and the lower optical area is used for near view.
Double light Glasses，Read a medicine label, do a crossword, watch TV, and see in the distance all with one pair of readers.
Sports Frame is Lightweight But, for Safety Eyeglasses with Wraparound Design that Provides Increased Side Protection and Peripheral Vision