Farsightedness, nearsightedness, and astigmatism, all three conditions are manifestations of refractive error. For the treatment of refractive errors, the main purpose is to improve visual acuity and maintain a clear quality of vision through various methods of correction. The commonly used correction methods are divided into two main types: the first one is the conservative method, which is the usual frame glasses or corneal contact lenses, mainly used for the correction of refractive errors in minors. The second is surgical treatment, usually for adults, and can choose excimer laser surgery, femtosecond laser surgery, and intraocular refractive surgery to correct refractive errors. There is a difference between farsightedness and nearsightedness and astigmatism. Farsightedness is likely to become smaller and smaller with age, while nearsightedness will become larger and larger.