In order to correct astigmatism, you need to go to a professional eye hospital for "medical optometry" to determine whether there is astigmatism and the degree of astigmatism (children must have mydriatic optometry to obtain very effective data). Astigmatism children often have strong regulatory ability, and even appear regulatory spasm.
Therefore, if the adjustment is not effectively eliminated, please check it. In this way, the astigmatism property and astigmatism degree detected are often invalid, which will appear: the computer optometry diagnosis is compound myopia astigmatism in children, and atropine astigmatism will become simple myopia astigmatism. Does Wenzhou glasses manufacturer tell you whether you need it?
therefore, before children wear astigmatism glasses, the degree of astigmatism must be checked by mydriatic optometry. From a medical point of view, corneal astigmatism can be divided into regular astigmatism and irregular astigmatism. Different types of astigmatism also have different matching schemes: conventional astigmatism wearing traditional frame glasses. Regular astigmatism is caused by the different curvature (i.e. refractive index) of the two main longitudes of the cornea or lens.
regular astigmatism can be divided into: simple astigmatism: one main meridian is emmetropia, and the other main meridian is hyperopia (simple hyperopia astigmatism) or myopia (simple myopia astigmatism). Compound astigmatism: the refractive power of the two main meridians is different, both of which are hyperopia (compound hyperopia astigmatism) or myopia (compound myopia astigmatism).
Mixed astigmatism: one main meridian is hyperopia, and the other main meridian is myopia.after reading the above introduction, I believe you have a certain understanding of whether astigmatism needs glasses. The article comes from the Internet. If there is infringement or violation, please contact us for deletion.