Surrounding out-of-focus correction spectacles for myopia

Abstract

The invention discloses a pair of surrounding out-of-focus correction spectacles for myopia, belonging to health care spectacles. The existing spectacles for the myopia are incapable of correcting hyperopia out-of-focus at the periphery of retina to cause that the myopia degree is promoted to be increased. The pair of surrounding out-of-focus correction spectacles for myopia provided by the invention is a pair of additional spectacles of two-layer spectacles, or two-layer spectacles. Plano lenses are arranged in optical zones on centers of additional lenses, main lenses are reserved for correcting myopia out-of-focus at the center of the retina when the sight distance is large, and thus the distant vision function is improved; and convex lenses are arranged in optical zones around the additional lens for correcting hyperopia out-of-focus at the periphery of the retina, and thus the increase of the myopia degree is effectively prevented and controlled.

Description

technical field [0001] The invention relates to a kind of glasses for correcting peripheral defocus of myopia, more specifically, relates to a pair of double-layer glasses or double-layer glasses for correcting retinal peripheral hyperopic defocus on the basis of traditional myopia glasses. Background technique [0002] The eyeball has an active adjustment process of emmetropization, which depends on the focus growth of the peripheral parts of the retina, especially children and adolescents are more significant to this defocus induction. The focal point falls behind the peripheral retina of the eyeball, which is called hyperopic defocus around the retina, which induces the eyeball to grow backward and promotes the increase of the degree of myopia. The focus falls in front of the peripheral retina of the eyeball, which is called myopic defocus around the retina, which stops the eyeball from growing backward and delays the increase in the degree of myopia. Existing traditiona...

AI Technical Summary

Problems solved by technology

However, wearing traditional myopia lenses for nearsightedness can promote or aggravate the hyperopic defocus around the retina. This is a serious technical defect of traditional myopia lenses. This factor is also called the glasses source factor of myopia.

[0003] The main lens of the existing double-layer glasses is myopia glasses, and the additional glasses are light-shielding sunglass lenses. The additional glasses or double-layer glasses have no function of correcting hyperopic defocus around the retina.

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