Exquisite anti-fatigue old man reading and writing magnifying reading glasses, pocket readerAspheric hard resin lensAspherical lenses are clearer, lighter and more natural, with a lens index of 1.56Strong impact resistance, not easy to break, safe and durablePhotochromic lensAdapt to the surrounding light. When exposed to strong sunlight, the glasses will dim. In the case of insufficient light, the glasses will light up.Lens material: 1.56 aspherical resin lensLens color: transparentOptical properties of the lens: photochromismUV protection category: UV400, UVA UVBPower range options: +1.0, +1.25, +1.5, +1.75, +2.0, +2.25, +2.5, +3.0,Applicable people: unisexWith glasses case: perfect gift for the elderly, father, grandfather, grandmother, mother.