0-4 years old: myopia causes and treatment: 1. giant eye, progressive growth of the eye axis, usually wearing glasses, no surgery; 2. spherical lens, crystal dislocation, must perform crystal removal and IOL implantation; 3. cone cornea or deformation can be treated with contact lenses. All children must be treated for amblyopia. 20-40 years old: excimer keratomileusis can be considered for low refractive error; refractive IOL implantation can be performed for high refractive error; refractive lens removal and IOL implantation can also be chosen for high myopia over 40 years old or for those who have developed complications of cataracts. Please talk to your ophthalmologist in detail about which method is more suitable for you and present your requirements.