One of the questions many parents often ask their doctors after their nearsighted child gets glasses is: Should I wear glasses when reading and writing? To answer this question, we first need to clarify the following concepts. The human eye needs the lens of the eye to adjust in order to see the words in the book when looking at the near place. The lens is like a convex lens, when looking close the lens becomes convex, increasing the refractive power to make looking at near objects clear. Generally speaking, the human eye is accustomed to reading at a distance of about 33cm to 40cm. Theoretically, in order to read the words on a book, the human eye needs to pay 3.0D of adjustment force for a 33cm reading distance. However, people like to be lazy, just like we can use seven points of strength to move objects, will never use ten points, adjustment is no exception. For a 33cm reading distance, many people may use 2.5D of accommodation to see clearly, which results in a difference between the actual accommodation used and the theoretical value, and this difference is clinically called accommodation lag, which causes the sharpest image to be located at the back of the retina, and this state is extremely detrimental to the control of myopia progression. In addition, the visual axes of both eyes converge when looking close, a process called accommodation, and the accommodation function of the eyes is also something that doctors need to consider during the lens prescription and wear process. A long time ago, clinicians believed that the mechanism of myopia onset and progression was related to accommodation, and that accommodation itself caused the onset and progression of myopia, which has been proven wrong. Recent studies have found that myopic patients are not over-regulated, but rather under-regulated, with decreased regulatory flexibility and more pronounced regulatory lag. Therefore, from a clinical intervention perspective, all interventions should start with improving accommodation and accommodation flexibility and reducing accommodation lag. In addition, eye position is also an issue that needs to be carefully considered in the process of lens prescription. Generally speaking, there are very few eyes in the population that are perfectly orthotropic, and all of our eyes have some degree of internal or external obliquity, and the distance and nearness are not quite the same, which also needs to be taken into account in the process of prescription and wearing of glasses. Let’s go back to the question of whether or not to wear glasses for homework. The answer to this question is “it depends on the specific situation”. For adolescent myopia patients with insufficient adjustment strength and poor adjustment flexibility (many adolescent myopia patients are in this situation), they need to wear glasses when looking at the near (without glasses, the adjustment function will be further weakened), and must be accompanied by adjustment training; for patients with excessive adjustment tension or even adjustment spasm, they can look at the near without glasses, and at the same time, they should relax the adjustment and look farther away, and if necessary, they can be considered with For patients with ciliary muscle paralytics to relax the adjustment; for patients with external obliquity and inadequate pooling function, they must wear glasses when looking at the near (in fact, most of these myopic patients); for patients with internal obliquity and too strong pooling function, they can reduce the number of degrees or even not wear glasses when looking at the near, the specific number of degrees to be reduced should be decided according to each person’s eye position when looking at the near. The classification of these conditions requires a visit to a regular hospital to see an optometrist to determine the specific indicators of visual function of both eyes.