Oversized Square Rainbow frame is made of premium acetate, which has a glossy finish. They are the optional choice for the ladies who pursuits stylish, practical and comfort Photochromic Bifocal reading glasses lenses have 2 parts for your convenience. The top part is just a clear lens and the bottom part has the reading glasses magnification.helps middle-aged and elderly people have a better viewing experience (reading, using electronics, enjoying the beauty). UV400 rated sunglasses are essential for filtering out sunlight reflected glare and protecting your eyes against long term UV damage when you go out. Photochromic lenses are transformed from indoor reading glasses to outdoor reading glasses. They can also be used as ordinary photochromic sunglasses with UV protection. Note: This is not sunglasses! ! The photochromic lens changes according to the intensity of ultraviolet rays. The stronger the ultraviolet rays, the deeper the discoloration, and the weaker the ultraviolet rays, the lighter the discoloration. (We will check carefully before leaving the warehouse). Bifocal Reading Glasses: Regular Clear Lens On Top with Reading At The Bottom Perfect For Outdoor Reading And Distance Viewing. No Longer Will You Need To Carry Multiple Pairs Of Glasse