Did you know that keratoconstrictive lenses need to be replaced at least once every two years? They are subject to scratches and other problems, just like frames, so ophthalmologists generally recommend that keratoconstructions be replaced at least once every two years. Not only that, but for young people who have been successfully fitted with keratoplasty lenses, the care of the lenses thereafter is also essential, and parents and young people should pay particular attention to the details. First of all, there are several situations that need to stop wearing keratoconus, such as cold and fever, diarrhea, eye redness, photophobia, tearing or increased secretion, and only when there are no serious problems and no effects can continue to use them. Secondly, corneal plastic lenses have a life span and life expectancy, generally speaking, about 2 years to replace a pair, but some teenagers replace more frequently, mainly because they do not pay attention to maintenance when using, so it is recommended that the user must be careful when cleaning, gentle movements, and even force. The liquid used for cleaning and caring for keratoconus lenses can only use the specified care solution, and cannot be replaced by other care solutions, and must be used up before the shelf life is exceeded after unpacking, the expired care solution and soothing solution can no longer be used. The life span of keratoplasty lenses is closely related to the care and removal of the wearer, so it is important to operate in full compliance with the regulations under the guidance of a doctor.