Keratoplasty is a kind of lens that can help correct vision, but if patients do not use it properly, it can lead to corneal infection, poor oxygen permeability, thinning of the center of the cornea, distortion of the corneal curvature and other eye diseases. 1. Corneal infection: If the patient’s hands are not clean when wearing keratoplasty lenses, or if there are bacteria or dust on the keratoplasty lenses, it may lead to infection, making the patient feel uncomfortable with the eye, corneal infection, and even corneal scarring in severe cases. 2. Poor oxygen permeability: Keratoplasty lenses are tightly bonded to the surface of the eye, and their air and oxygen permeability is not as good as that of the cornea itself. If patients wear them overtime, it may lead to symptoms such as dry eyes, dry itching, and even dry eyes in severe cases. 3. Thinning of the center of cornea: The central thickness of normal cornea is about 0.56mm, while patients who wear keratoplasty lenses for many years will experience mild thinning of the central part of cornea. 4. Corneal curvature deformation: Corneal curvature deformation is related to the central thinning of the cornea. Since the central part of the cornea will be slightly thinned, the peripheral part of the cornea will appear to be higher, which means that the corneal curvature will be changed and deformed. However, corneal morphology is reversible, stop wearing for a month or even longer, the cornea will return to its original state. 5. Appearance of other eye diseases: Some patients who do not wear keratoplasty lenses according to the standard operation may have irregular astigmatism or some eye diseases, etc. It is recommended that patients should follow the regular use of keratoplasty lenses. It is recommended that patients usually wear them according to the regular use method and use them under the doctor’s guidance to avoid aggravating the condition.