Spectacle lens for preventing refraction deterioration and asthenopia caused by asymmetric visual field and therapeutic instrument

Abstract

The invention provides a spectacle lens for preventing refraction deterioration and asthenopia caused by asymmetric visual field and a therapeutic instrument and belongs to the technical field of thespectacle lens and therapeutic instrument for eye healthcare and treatment. Above the center of the spectacle lens in a visual area, a distance from a geometric center or theoretic geometric center ofthe visual area to a horizontal line of lower edge of peripheral visual area is greater than the distance from the geometric center or theoretic geometric center of the visual area to the horizontalline of upper edge of peripheral visual area; an out-of-focus lens is arranged in the peripheral visual area; the visual area is arranged as a hole or is equipped with a non-out-of-focus correcting lens; the non-out-of-focus correcting lens comprises a short-sighted non-out-of-focus correcting lens or far-sighted non-out-of-focus correcting lens and an astigmatic non-out-of-focus correcting lens;an astigmatoscope with same or basically same astigmatic degree of the astigmatic non-out-of-focus correcting lens is compounded on the peripheral visual area. The spectacle lens and the therapeutic instrument provided by the invention can effectively prevent the fatigue and ametropia deterioration caused by the deterioration of eyeball dissymmetry, and the effect is excellent.

Description

technical field [0001] The invention belongs to the technical field of spectacle lenses and therapeutic instruments for eye care and treatment. Background technique [0002] The prior art anti-myopia glasses are generally designed according to the complete symmetry of near objects in the peripheral area of ​​the visual field, but in fact, the vertical distance of near objects in the peripheral area of ​​the extraocular visual field is not very symmetrical, so the design does not conform to reality Condition. When reading and writing, due to the long-term asymmetry between the upper and lower sides of the outer visual field, the near area will cause severe deterioration of eye refraction and visual fatigue, which will further aggravate the further deterioration of hyperopia, myopia and astigmatism. Moreover, the resulting deterioration cannot be solved by the prior art. In the prior art and in reality, the degree of correction is generally undercorrected when correcting refr...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a spectacle lens and a therapeutic instrument that prevents eye refraction deterioration and asthenopia caused by visual field asymmetry. Symmetrical eye refraction deterioration and visual fatigue problems, the effect is good

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