Contacts, as a type of corneal contact lens, should be at least 12 years of age or older if you want to wear them before you can consider wearing these glasses. These glasses usually have poor oxygen permeability and breathability, so as an ophthalmologist, we recommend that they should not be worn for long periods of time without special circumstances. Because long-term contacts are worn on the surface of the cornea and conjunctiva, they can easily affect the metabolic function of the eye, which can cause local inflammation over time. For example, conjunctivitis, keratitis, corneal damage, and in severe cases, even infection in the eye, so these glasses can cause more damage to the eye, so it is recommended that you do not wear contacts for a long time. If you wear them occasionally or for a short period of time, the effect is not too great and you can wear them.