Photochromic Reading GlassesPhotochromic reading glasses lenses are clear indoors or at night and automatically darken to a sunglasses tint when exposed to UV sunlight.The lenses begin to clear once exposed to UV sunlight and are noticeably brighter and mostly clear within a few minutes.They absorb UV radiation that can otherwise damage your eyes.They switch between their reading glasses and their sunglasses.Multifocus Reading GlassesIntelligent progressive multifocal lenses provide the best experience.Multifocus reading glasses offer three strengths in one pair of reading glasses, allowing you to read, work on your computer, and interact with others without having to remove your glasses. Because they are progressive lenses, they generally require about a week of adjustment time. The adjustment periodHowever, it varies from person to person. Walk slower if you feel dizzyNotesThey are not as black as sunglasses!!The photochromic lens changes depending on the intensity of the UV rays.The stronger the UV rays, the deeper the discoloration and the weaker the UV rays, the lighter the discoloration.Photochromic lenses transform from indoor reading glasses to outdoor reading glasses and can also be used as ordinary photochromic sunglasses with UV protection.Anti-blue light lensWearing anti-blue light glasses protects your eyes from the harmful blue light.No dry eyes when working with electronic screens for long periods of time.No headaches after all day office work.Reduce eye strain symptoms during prolonged computer use.The lens can block UV rays and is suitable for watching TV and computer viewing.Package Included1*Photochromic Transition Reading Sunglasses, 1*Glasses Cleaning Cloth, 1*Glasses Case, which can be an exquisite gift for your family and friends.If you have any issues with our reading glasses, we stand behind the quality of our glasses and are confident that you will love our safety glasses.If you have any questions about our glasses, please feel free to contact us.We offer the best solutions until the customer is satisfied.