Contact lenses cannot be soaked in mineral water for the following reasons: 1. Contact lenses are a type of lens worn in the eyes, requiring patients to meet hygiene standards before they can. The lenses of contact lenses must be soaked and disinfected with the corresponding care solution before they can be worn in the patient’s eyes. On the one hand, mineral water has no disinfection effect, so the lenses are not well disinfected, and when patients wear them in their eyes, it may cause inflammation in the eyes; 2. The osmotic pressure of mineral water is not suitable, and if mineral water is used for soaking, it will affect the performance of the entire lens. It is also possible to change the parameters of the lenses, which is not suitable for wearing.