Corneal contact lenses, also known as contact lenses or invisible glasses, are lenses that are attached to the surface of the cornea and move with the movement of the eye. Between the posterior surface of the contact lens and the anterior surface of the cornea, which is usually filled with tear fluid, is called a liquid lens. The refractive index of contact lens, liquid lens, cornea and atrial fluid are very similar, so it can be considered as a refractive intermediate. The surface of this newly formed refractive intermediate, the regular spherical surface of the corneal contact lens, actually acts as a refractive surface. Using this property, refractive errors, including hyperopia, myopia, astigmatism, especially irregular astigmatism, as well as unilateral aphakia and refractive aberrations, can be corrected. Amblyopia recurrence refers to a renewed loss of vision that has been improved. According to recent literature, the recurrence rate of amblyopia is about 30%. It is found that the recurrence rate of amblyopia is mainly related to the degree of amblyopia, the age of initial diagnosis and the nature of gaze, the more severe the degree of amblyopia, the older the age of initial diagnosis, the higher the recurrence rate; the recurrence rate decreases according to refractive amblyopia, strabismic amblyopia and refractive error amblyopia; the recurrence rate of paracentral gaze is higher than that of central gaze, and the larger the angle of eccentric gaze, the higher the recurrence rate. How to reduce the recurrence rate? We believe that the recurrence rate can be reduced through the following treatment programs: 1. insist on wearing glasses 2. strictly implement the amblyopia cure criteria 3. master the timing of correcting strabismus and actively and effectively treat it 4. strengthen binocular vision and related training 5. standardize and strictly implement the follow-up system Amblyopia is a relatively common childhood eye disease, and is also one of the eye diseases that seriously endanger the vision of children and adolescents. Amblyopia treatment is a long and demanding process, and children with amblyopia have personality characteristics such as inattentiveness and hyperactivity. Due to parental negligence, it is likely to have adverse lifelong effects on the affected child. In the process of amblyopia treatment, we should consider the medical problems of visual acuity and rehabilitation of binocular vision function, as well as the negative emotional impact and stress of patients and their families, and also pay attention to the post-treatment follow-up to prevent the phenomenon of visual acuity regression after treatment. Soft and easy to bend, less irritating to the cornea, in line with the requirements of corneal respiratory metabolism. But the mechanical strength is poor, more brittle is not very durable, susceptible to humidity, easy to become exactly the same as the corneal surface, so it can not fully correct astigmatism above 2.00D, and the optical effect is not as good as the hard, disinfection procedures are also more troublesome, in recent years, the semi-rigid contact lens made of acetate and other agents, good oxygen permeability, high mechanical strength, but also has a certain softness, is a promising new type of contact lenses. Clinical contact lenses are used for: 1, correction of refractive error, especially corneal astigmatism, high myopia, refractive parallax, aphakic eyes, etc. Certain professions such as athletes, actors, and jobs not suitable for wearing ordinary glasses, contact lenses can often play its unique performance. Contact lenses can eliminate or reduce the trigeminal effect of ordinary eyeglasses, oblique astigmatism, and retinal image magnification in aphakic eyes. It plays a positive role in improving visual acuity as well as monocular function of both eyes, etc. 2, treatment of diseases, mainly hydrophilic soft lenses, can cure large vesicular keratopathy, corneal ulcer, corneal conjunctival dryness, corneal conjunctival burns, corneal penetrating injuries, etc.. It provides a new route of drug delivery by utilizing its properties of adsorption and penetration of drugs. In addition, tinted contact lenses can eliminate light irritation for albinos in order to improve visual acuity; mask defects and improve grooming for corneal leukoplakia patients, etc.