Progressive Lens: top is a half power magnification for walking and shopping. The middle part is a slightly reduced power magnification for computer work, watching TV, etc. At the bottom of the lens is full power magnification, which is used for close reading. This means you can wear glasses whenever and wherever possible. Photochromic lenses are transformed from indoor reading glasses to outdoor reading glasses. They can also be used as ordinary photochromic sunglasses with UV protection. Anti Sunlight: Photochromic gray sunglasses help you to care of eyes (outdoor activities) Sports Frame is Lightweight But, for Safety Eyeglasses with Wraparound Design that Provides Increased Side Protection and Peripheral Vision Our new Progressive Multifocal readers are made for your busy lifestyle, so you can stay focused – while you're reading, interacting, or driving. 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) [Three Levels of Vision]Progressive multifocus glasses for all your need. Top part is half-power magnification for walking, shopping. The middle part is slightly reduced power magnification for working on computer, watching TV, etc. The bottom part of the lens is full-power