The main conditions suitable for keratoplasty lenses are: (1) adolescents aged 7 years and older, with some self-care ability and persistent progression of myopia; (2) no significant corneal conjunctival abnormalities, or other ocular diseases, no serious systemic diseases; (3) clear motivation and very good compliance; (4) understanding of the mechanism of action of keratoplasty lenses and their potential problems and limitations of correction; (5) spherical lens degree 0.75~6.00D 6.00D (especially recommended below -4.00D), <1.50D cis-routine corneal astigmatism, or ≤0.75D retro-routine astigmatism; (6) Corneal curvature range 41.0~45.5D; (7) Have some financial basis to afford the cost of lenses or other expenses during treatment; (8) Adults who are engaged in certain occupations such as firefighters, pilots, police officers, etc. who are not comfortable wearing glasses. Contraindications for plastic lenses include: (1) patients with high expectations and misconceptions, such as unrealistic beliefs that the method can cure myopia; (2) obvious eye diseases; (3) cone corneas; (4) refractive error >6.00D, retro-rational astigmatism >1.00D, cis-rational astigmatism >2.00D; (4) patients with large pupils; (5) young, unable to take care of themselves, poor personal hygiene; (6) poor personal hygiene. (6) Patients with intraocular pressure outside the normal range; (7) Patients who are unable to complete the follow-up operation, and those with poor compliance with fitting and follow-up.