Pseudomyopia, as the name implies, is not myopia, it may be orthopia or mild hyperopia, but clinically, it is not as clear as myopia, and can be improved by wearing myopic lenses, but the optometry is orthopia or hyperopia when the adjustment is completely paralyzed, which is essentially a functional state of spasm of adjustment. The pathogenesis of the disease is that when the eye looks close, it must be adjusted in order to see clearly. The closer you look, the more adjustment you need. Therefore, if an object or book is too close to the eye, less than 33 cm (one city foot), or even less than 15 cm in some cases, the eye has to be highly adjusted and the ciliary muscle has to be highly contracted. Due to the use of the degree of regulation is too strong and last too long, over time, unknowingly will make the eye regulation abnormal tension, the ciliary muscle in a long-term contraction spasm state, and finally lost the elasticity, see long-sightedness decline, performance on cool myopia. This is why the importance of correct sitting posture is emphasized. It is difficult to find the reason from the pathogenesis can be seen that the formation of pseudomyopia is due to the lens adjustment spasm, the lens spasm will only lead to twenty degrees or fifty degrees of myopia, this degree has less impact on the naked eye vision, the general naked eye vision are between 0.7 to 0.9, in this range of vision if not to look at very far small objects at all, the vast majority of people do not feel any vision The majority of people do not feel any abnormalities in their vision, so they do not expect to come to the hospital for examination at this time. The process of pseudomyopia is very short, if not treated in time and do not correct the previous incorrect eye habits, 3 to 6 months later will evolve into true myopia, so the time to treat pseudomyopia is fleeting, once you miss the opportunity to lose treatment, only to wear glasses. Pseudomyopia is characterized by a low degree of “myopia”, usually 20 or 50 degrees. 02 Naked eye vision is relatively good, usually between 0.7 and 0.9. 03 Vision is unstable and may improve after a period of rest, but can become worse after a long time of looking at it again. 04 Normal vision is below 1.0 before the ciliary muscle paralyzing agent is ordered. The visual acuity of the naked eye rises to 1.0 or better immediately after the ciliary muscle paralyzing agent is ordered.