The lenses for students with myopia may also be considered according to the purpose of the prescription and the age of the student. If the student is over 18 years old, the prescription is basically stable and will not progress, so the general monofocal lenses can meet his needs. But for people under 18 years old, the prescription may be increasing every year, and for the purpose of myopia prevention and control some special lenses may be used, because it has been found that such monofocal lenses can only play a role in correcting vision, but the effect of controlling myopia is not very satisfactory, for example, some out-of-focus frames, at present, the efficiency of control may be 40%-50%. If the child is fitted with monofocal lenses, it may be advisable to combine them with other myopia control methods, such as photophoresis, or other low concentration atropine drops to assist in the treatment.