Classification and prevention of myopia

Abstract: long time close eye use, excessive use of adjustment, myopia caused by adjustment tension or spasm, myopia disappears after rest or use of ciliary muscle paralysis. This phenomenon is called regulatory myopia, also known as “pseudomyopia”. The formation of

pseudomyopia is due to the insufficient adjustment range of patients. Long-term close eye use leads to long-term visual fatigue. Fatigue can not be sustained, which is bound to make the eyes enter a compensatory state and produce functional compensation such as ciliary muscle spasm.

1. Classify

according to the degree of myopia. 1. Myopia with low myopia and diopter less than 3.0d.

2. Moderate myopia with diopter of 3.0d ~ 6.0d.

3. Myopia with high myopia diopter greater than 6.0d.

2. According to the refractive status, it is divided into axial myopia and refractive myopia

1. The refractive components of axial myopia are basically normal and the axis of the eye is too long. Most myopia can be attributed to axial myopia.

2. The refractive power of the refractive stroma of refractive myopia is too strong, but the ocular axis is normal.

3. The most common curvature myopia is the increase of corneal or lens curvature, such as keratoconus, large cornea or small cornea, spherical lens or small lens after corneal transplantation, etc.

4. Accommodative myopia uses the eyes at close range for a long time and uses adjustment excessively, resulting in myopia caused by adjusting tension or adjusting spasm. After rest or using ciliary muscle paralysis, the myopia state disappears. This phenomenon is called accommodative myopia, also known as “pseudomyopia”.

III. according to the nature of myopia, it is divided into simple myopia and pathological myopia

1. The vast majority of simple myopia occurs in adolescence, with slow progress, low diopter and good corrected vision. With the cessation of physical development, the near development of myopia tends to be stable. This kind of myopia is simple myopia. Most acquired myopia can be attributed to this category.

2. Pathological myopia is also called malignant myopia, degenerative myopia, high myopia and progressive myopia. It belongs to genetic myopia or congenital myopia. It is characterized by genetic factors: rapid development, continuous deepening, and obvious progress of myopia in adolescence; The degree of myopia is large, generally more than 6D; The ocular axis was significantly prolonged, and the fundus lesions appeared in the early stage and continued to worsen; The visual function is obviously damaged, and the far vision is low, which can not be completely corrected. The classification of

myopia in most patients is


pseudomyopia. The etiology of pseudomyopia: it is caused by the spasm of ciliary muscle used for a long time.

when the eyes look close, they must use adjustment to see clearly. The closer they look, the more adjustment they need. Long time close eye use leads to tension of adjustment or spasm of adjustment function. The eyes cannot relax the adjustment when looking at hyperopia, and the vision decreases.

early pseudomyopia can be treated properly, which can improve vision and completely eliminate the degree of myopia. Classification of


mixed myopia

mixed myopia etiology: it develops from pseudomyopia.

mixed myopia is also called intermediate myopia or semi true myopia. Patients with mixed myopia usually show myopia. After using ciliary muscle paralysis drugs or fog vision, the myopia diopter decreases, but the myopia can not be completely eliminated. The occurrence of mixed myopia of


has both regulatory factors and organic factors. The degree reduced after regulatory relaxation is the result of functional compensation, and the remaining degree that cannot be eliminated is the result of organic compensation.


mixed myopia can reduce the degree of wearing glasses. Through treatment, it can restore the part of regulating spasm. If it is not ignored, it will turn into true myopia. Classification of


true myopia

true myopia etiology: it develops from mixed myopia. Characteristics of


true myopia: ① the degree of myopia is mostly medium and high myopia, the development time is long, and the patient’s glasses have produced different degrees of organic lesions. ② True myopia will not self adjust and recover. If children’s myopia is not controlled, it will continue to deteriorate.

ophthalmologists remind: myopia patients with more than -6.00d will lead to autosomal recessive inheritance, and high myopia will bring a series of complications and seriously affect visual function.

attention! The development of true myopia can be controlled. The increase of degree and the occurrence of complications can be controlled through training.

prevention and treatment principle of myopia

treatment of false and true

the formation of false myopia is due to the insufficient adjustment range of patients. Long-term close eye use leads to long-term visual fatigue. Fatigue can not be released, which is bound to make the eyes enter the compensatory state and produce functional compensation such as ciliary muscle spasm.


are mainly used to treat early pseudomyopia through adjustment function training, atropine and prism.

pseudomyopia visual training – training of adjustment function (adjustment amplitude and adjustment sensitivity)

it is the most effective method to cure pseudomyopia through adjustment function training.

prevention and treatment principle of myopia

treatment and prevention of

Pseudomyopia is only a state of functional compensation, while patients with mixed myopia and true myopia have had different degrees of organic compensation.

although the diopter of mixed myopia is generally low, there are also some components of true myopia. Therefore, like true myopia, mixed myopia can not completely eliminate the degree of myopia, but can only be alleviated and deepened through visual training. The increase of diopter of


is the result of organic compensation in children with myopia, that is to say, there have been changes in eye structure such as corneal curvature and axial length in children with true myopia. really