Zeiss Smart锐Single Vision Gradient Tinted Lenses are a type of corrective eyewear lenses designed by the German optics company, Zeiss. These lenses feature a gradient tint, which transitions from clear to darker at the edges, providing comfort and reducing glare for wearers. They are commonly used for everyday vision correction and offer a stylish appearance. The 'Smart锐' prefix suggests advanced technology and features in the lens design.