1.5 Zeiss Changle Lotus Film mv60 indicates that the refractive index of Zeiss Changle lens is 1.60. According to relevant data, mv60 is the anti-counterfeiting mark of Zeiss Changle lens, and the refractive index of Zeiss Changle lens can be divided into 1.5, 1.6 and 1.67. Mv60 is a lens with a refractive index of 1.0. The film is divided into basic film, lotus film and intersecting platinum film, which is more wear-resistant. The design is divided into Changle, Changle Professional Edition and Le Cheng Personal Edition. Compared with the conventional Le Cheng, the professional version adds the eye age recognition technology based on big data analysis, which optimizes the luminosity for Asian children to wear glasses. On the basis of the professional version, the personal version adds more tailor-made components, provides more and more comprehensive detailed parameters, optimizes the luminosity and improves the control effect.