The treatment scope of cold laser is relatively wide, mainly used for correcting vision, removing spots, analgesia, oral disease treatment and so on. 1. Correcting vision: Cold laser is used to correct vision through precise computer control, and different shapes and depths can be selected according to the degree of myopia, so as to improve the refractive power of the cornea and improve the state of myopia of the eyes. 2. Spot removal: laser treatment that stimulates the decomposition of skin pigmentation and kills epidermal bacteria is mainly used for the treatment of coffee spots, age spots and freckles on the surface of the skin, and it can also be used for the auxiliary treatment of facial folliculitis and acne. 3. Analgesia: Cold laser has analgesic effect, which can strongly carry out nerve block, promote the absorption of analgesic substances, and relieve arthritis-induced lumbago, neuralgia and other symptoms. 4. Oral disease treatment: Cold laser irradiation can promote the growth of new blood vessels, stimulate protein synthesis, kill bacteria in the oral cavity, alleviate periodontitis, pulpitis and so on have a certain effect. For laser treatment intolerant people, pregnant women, etc., it is not recommended to use cold laser treatment, if necessary, it is recommended to go to the regular medical institutions to do the relevant examination.