Yes Professor Xiong from the Department of Ophthalmology, the Second Affiliated Hospital of Xi Jiaotong University in Shaanxi Province reminded that wearing sunglasses is mainly to prevent ultraviolet rays, while purple sunglasses can enhance the absorption of ultraviolet rays. Electromagnetic waves whose ultraviolet wavelength is shorter than that of visible light are located outside the violet light of the spectrum. It has bactericidal ability and is widely used for disinfection and treatment of skin diseases and rickets.