Myopia is a common disease of the eye, and it is more reliable to go to a hospital for an examination, not to an optician or medical institution that is not qualified to treat it. If the fitting is not accurate, it can bring harm to the eyes. Myopia examination methods, depending on the age, are divided into two types: the first is subjective optometry, including astigmatism and contrast optometry, which can be used for myopia examination of children under 14 years old as well as adolescents, removing the eye’s own adjustment ability, which can truly reflect the refractive state of the eye. The second type is myopia in adults, which can be determined directly by computerized optometry. No matter which method is used, it must be accurately determined by a professional optometrist after an examination.