Photochromic 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.
the yellow line is the demarcation line. They can help first-time buyers how to wear the glasses. You can use the glasses cloth around your nails and then take it out .don't worry that your glasses will scratch, our lens are hard.
Lightweight and comfortable for prolonged wearing. Support Wear together with your own eyeglasses
Supplied in a high quality case and cleaning soft cloth
If you have any question, pls feel free to contact us

Technical Details

Product Details

Package Dimensions
Width : 2.7 inch
Height : 1.7 inch
Length : 6.5 inch

Shipping Weight: 0.16 ounce (View shipping rates and policies)

ASIN : B0777KLJC1