Glasses, semi-medical and semi-commercial glasses salesmen need to master ophthalmology, such as the structure of eyes, simple complications of eyes, and materials science, such as the functional properties of lens materials. A large optical shop like Chiba Glasses should generally have training for new salespeople in this field, and it will definitely take several months to get on the job.

Anyway, buying glasses is not as simple as buying clothes, and their wages are not so high, because glasses are a small industry after all. According to the statistics of the National Professional Glasses Association, the sales of glasses nationwide last year did not exceed 25 billion yuan, which may even exceed this figure for a small real estate project in Chongqing.