Usually, swimming is not allowed with contact lenses.
Swimming pools are not sterile environments, and if you enter one wearing contact lenses, the water in the pool may enter your eyes, with or without swim goggles. If water enters the contact area between the lens of the contact lens and the eye, it may increase the chance of bacterial infection in the eye and cause eye inflammation.
Swimming pools are often sanitized in order to keep the water clean, which contains a certain amount of disinfectant components, and if this component enters the contact lenses, it will not only destroy the structure of the glasses, but may also damage the eyes through the glasses.
Contact lenses, due to their special structure, have an adsorption effect on some small substances in the surrounding area, such as bacteria and impurities. If you wear contact lenses in the pool, it may accelerate the speed of impurities and bacteria in the water to enter your eyes, causing eye infections.
Therefore, contact lenses should be avoided as much as possible when swimming to prevent adverse damage.