Pseudomyopia is a refractive condition in which the ciliary muscle (which regulates the refractive state of the eye) is constantly tense, causing the eye to be unable to relax or slow to relax when looking at a distance. This is characterized by lower than normal distance vision and normal near vision. After physical or pharmacological relaxation, the distance vision can be restored to normal, and after dilated pupil examination, the eye appears normal or mildly hyperopic. Pseudomyopia and myopia are two essentially different concepts. The former is a temporary myopia formed by the inability to effectively relax regulation on the basis of orthopia or hyperopia, which is essentially a spasm of regulation, while myopia is a true static refractive error (the target passes through the refractive system of the eye and is focused on the retina – which is commonly referred to as the fundus – before it appears in the fundus). -) even when no accommodation is involved. There are many experts and scholars who believe that there is an evolution of pseudomyopia – mixed myopia – true myopia in the development of myopia in adolescents. It is also believed that the regulatory burden continues to increase due to prolonged near vision work, which leads to excessive tension (or spasm) of the regulatory muscles. This is why some call it regulatory myopia. During this period, if reasonable treatment is carried out to relax the regulation, the change of pseudomyopia can be reversed and mixed myopia can be reduced. Otherwise, over time, there is a tendency for organic (true) myopia to develop. To sum up: pseudomyopia is a kind of “myopia” caused by dysfunctional regulation, which is functional and reversible, i.e. it can be restored to normal by physical or medication. True myopia, on the other hand, is structural, organic and irreversible. True myopia includes two types: axial myopia and refractive myopia. Axial myopia is myopia due to the lengthening of the eye axis, and refractive myopia is mostly formed by high and steep corneal curvature, which is unchangeable regardless of the lengthening of the eye axis or high corneal curvature.