Parents often ask if their children need to wear glasses for a long time after they have been prescribed myopic glasses. Will it increase faster if you wear glasses regularly? The answer to most of these questions is to wear glasses when looking at the blackboard, but not when looking close or writing homework. I’ve been thinking about this issue, and here are some of my thoughts. We know that when the orthogonal eye looks close, there will be a triplet of movements: the eyes coalesce, the pupils narrow, and the adjustment reflex. The purpose of cohesion is to make the object imaged in the binocular axis, which is conducive to binocular fusion; pupil narrowing is to reduce the light entering the eye, because the same object, the closer the light entering the eye, the more; adjustment reflex is the contraction of the ciliary muscle, lens protrusion increases, the refractive power of the entire eye increases, so that the dispersion of light convergence in the retina. It is because of the simultaneous action of the triplet that we may see clearly and comfortably when looking at the near. Moreover, these three have the relationship of you are strong and I am strong, and you are weak and I am weak, i.e. if the amplitude of regulation increases, then the angle of convergence (cohesion) also increases accordingly. If you are nearsighted, you can simply understand that the refractive power of the whole eye increases, so when you look at the near, you can not use the adjustment reflex or less than normal adjustment, but the angle of internal aggregation is the same as normal, which inevitably leads to the incompatibility of adjustment and internal aggregation; in order to solve this incompatibility, either increase the adjustment or weaken the internal aggregation, and finally break the original balance between the extraocular muscles, and may appear adjustment spasm. In particular, exotropia and even strabismus may occur. As we can see, myopic eyes do not wear glasses when looking at the near, because the ciliary muscle is rarely used, in the long run, it will lead to a decrease in ciliary muscle force, atrophy, and a decrease in the magnitude of regulation; and because of the imbalance between the extraocular muscles, it may cause exotropia or even strabismus. If one wears glasses when looking at the near, the same amount of adjustment as in the orthoptic eye, the chances of causing an adjustment spasm are similar (but the adjustment and assembly are synchronized, which is less likely to cause an imbalance between the extraocular muscles). Therefore, I think it is better for myopic patients to wear glasses and pay attention to the time of continuous eye use at close range (preferably no more than 1h, and then look away to relax the ciliary muscle), which should be beneficial for myopia control and eye health!