Although more and more people use orthokeratology, parents still have many questions about its safety. Answer: Orthokeratology glasses worn at night must be made of hard contact lens materials with high oxygen permeability, and meet the minimum oxygen permeability standard of continuous contact lenses, so as to maintain the maximum oxygen supply of the cornea with eyes closed; In addition, in the initial stage of wearing orthokeratology lenses and some subsequent re-examination processes, ophthalmologists will arrange eye examinations for children in the morning to ensure that there is no corneal hypoxia; Combined with proper use and cleaning procedures and regular follow-up by ophthalmologists, hypoxia caused by wearing orthokeratology lenses at night is not common. Answer: If the curvature of the lens is appropriate, the method of removing the lens and the cleaning and nursing procedure are appropriate, the probability of corneal epidermis defect is very small. Ophthalmologists will regularly arrange eye examinations and pay attention to whether children wear and care for lenses correctly. If the cornea is damaged, the ophthalmologist will recommend temporarily stopping it until the cornea heals; And solve the cause of corneal injury, then we can use orthopedic glasses again. If corneal health problems are found and treated immediately at the initial stage, the chance of corneal injury is very small. A: Keratitis only occurs when there is a defect in the corneal epidermis, the resistance decreases and the bacteria increase. The main cause of infection is often improper cleaning and nursing of contact lenses. Therefore, the wearer must thoroughly clean and disinfect the lenses after daily use, perform deproteinization procedures every week, and regularly check the eyes and replace them with new lenses. If you have tears, jealousy, pain, photophobia, etc. Stop wearing it immediately and seek help from an ophthalmologist. In a word, it is safe to wear orthokeratology lenses on the premise of wearing, using and caring lenses correctly, checking eyes regularly and treating them in time when there are problems in eye health.