It is a photochromic sunglasses that have an anti-blue light effect indoors, and the lenses will turn gray outdoors to effectively block ultraviolet rays.

Dual-Purpose Lenses: The single lens allows these sunglasses to seamlessly transition between indoors and outdoors.

Block blue light: The lenses can effectively block the harm caused by blue light indoors.

Daytime Adaptability: During the day, the lenses transition from clear to subtle gray. This not only protects your eyes from harmful UV rays but also reduces glare, making them perfect for sunny days.