1Blue light blocking function lens, can effectively block harmful blue light, and reduces harmful light damage to the eyes. 2Highquality metal nose pads, simple and stylish, light and comfortable to wear. Strong hinge, easy to open and close. 3Curved glasses leg, fluent line, won't pinch your face and ears, suitable for longterm wear. 4Multifocal progressive lens, can see the distant view, the middle view, and the close view clearly. 5Folding design, light weight and in small size, easy to store and carry, suitable for different occasion.