his photochromic lens are based on the intensity of sunlight and ultraviolet light, darkening the light grey lens.The stronger the light, the darker the color of the lens is,can protect the eyes without disturbing your perception of color.
Model Number: ZP-RG056-PH
Size:（51-18-145）140*145*41mm/15.8g
Frame Material: Metal
Lens Material: PC
Color: Black
Magnification Strength: 1.0x,1.5x,2.0x,2.5x,3.0x,3.5x & 4.0x