Pseudomyopia is a refractive state in which the eye cannot relax or is slow to relax when looking at a distance due to persistent tension in the ciliary muscles (which regulate the refractive state of the eye). It is characterized by lower than normal distance vision and normal near vision. After physical or pharmacological methods to relax the regulation, distance vision can be restored to normal, after dilated optometry, the performance of normal eyes or mild hyperopia. Pseudomyopia and myopia are essentially different concepts. The former is in orthopia or hyperopia on the basis of regulation can not be effectively relaxed and the formation of temporary myopia phenomenon, in essence, belongs to the spasm of regulation, is the result of dysfunction of regulation, is not the real myopia; and true myopia is in the case of complete removal of the regulation of the involvement of myopia (after the target through the refractive system of the eye, focusing on the retina, that is, usually referred to as the fundus of the eyes before the fundus of the eyes, in the fundus of the eyes presents a blurred image), is It is caused by the lengthening of the eye axis, which is in essence an irreversible organic change in the structure of the eyeball (the comparison of the above figure clearly shows the lengthening of the eye axis in myopia). There are many experts and scholars who believe that in the development of myopia in adolescents, there is an evolutionary process of pseudomyopia – mixed myopia – true myopia. It is also believed that pseudomyopia is caused by a continuous increase in the burden of regulation caused by long-term engagement in near-vision work, which leads to excessive tension (or spasm) of the regulation muscles. This is why some people call it regulated myopia. The changes in pseudomyopia can be reversed during this period if reasonable management is carried out to relax the regulation. Otherwise, there will be a tendency toward organic (true) myopia. To summarize: Pseudomyopia is a kind of adjustment dysfunction caused by false “myopia”, which is functional and reversible, i.e., it can be normalized by physical or medication. True myopia is structural, organic and irreversible. There are two types of true myopia: 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 the high corneal curvature, and the reason why true myopia is untreatable is that it is irreversible.