The rapid development of myopia in children is not slowed by frame glasses. Current research shows that myopia can be slowed down by the correct use of rigid corneal contact lenses and keratomileusis. The purpose of wearing keratoplasty lenses at night is to make the myopic cornea become mildly myopic or non-myopic by wearing them on the surface of the eye, and then the cornea is deformed according to a reasonable shape that we set. If used for a long time, myopia can be controlled to a certain extent and can also have a preventive and therapeutic effect on myopia. Indications: keratoplasty indications: (1) myopic patients need high naked eye vision, can not accept frame or contact lens correction and surgical treatment; (2) adolescents with rapid development of myopia (age > 8 years, have some self-care ability, children need parental supervision); (3) myopia ≤-600D, astigmatism ≤-1.50D (parsimonious astigmatism); (4) corneal curvature (4) Corneal curvature range 41D-46D, too large or too small correction difficulties Shandong Eye Hospital Ophthalmology Gao Yan; (5) no other eye and systemic diseases; (6) can understand the mechanism of action of keratoconus and potential problems and limitations of correction; (7) clear motivation and very good compliance, good hygiene habits, can follow up regularly as prescribed; (8) have a certain (8) have a certain financial base and can afford the cost of treatment. Contraindications to keratoplasty: (1) misconceptions about keratoplasty treatment, high expectations or unrealistic beliefs that the method can cure myopia; (2) refractive error >-6.00D, retro-regular astigmatism, and cis-regular astigmatism >2.00D are not suitable for night wear; (3) patients with significant intraocular astigmatism, the ratio of spherical to cylindrical lenses in the corrected refractive error is less than 2; ( (4) large pupils, especially large pupils at night; (5) eye diseases: epithelial cell lesions, endothelial cell lesions, cone keratoconus, recurrent epithelial cell spotting, corneal hypo-intuition and severe dry eye and infection, inflammatory diseases, incomplete eyelid closure, paralytic strabismus, nystagmus, lens clouding and acute and chronic glaucoma, acute inflammation of the eye in any active phase, chronic uveitis, chronic (6) systemic contraindications: severe diabetes, rheumatoid arthritis and other immune diseases and psychiatric patients; (7) individual conditions are relatively contraindicated: relatively poor personal hygiene, poor compliance can not be reviewed on time; (8) allergic to the components of the care products. Rigid corneal contact lenses: daytime wear Indications: 1, general myopia, hyperopia, astigmatism, refractive error; 2, high myopia, high hyperopia, high astigmatism, irregular astigmatism; 3, cone cornea and other corneal degenerative diseases and high irregular astigmatism due to corneal scar; 4, eye trauma, lens-free eye, iris-free eye; 5, refractive abnormalities after corneal refractive surgery or corneal transplantation; 6, adolescent Myopia control and treatment. Contraindications: such as lacrimal sacculitis, diabetic patients can not wear contact lenses, because after wearing even minor corneal epithelial abrasions, can cause infection of the cornea, eyelids, conjunctiva, cornea with progressive inflammation, such as blepharitis, conjunctivitis, viral keratitis, etc. Those with lacrimal disease, those with allergic diseases, and those with eyelid deformities. Those who work under conditions of strong acid, strong alkali, free dust, poor personal hygiene, poor work environment hygiene and those who are not easily followed up are not suitable for wearing corneal contact lenses. It is very important to have a proper fitting and timely follow-up after wearing the lenses, especially if there is redness and tearing in the eyes, so as to prevent serious complications.