Full-focus surface-controlled myopia prevention and control lens

Abstract

The invention discloses a full-focus surface-controlled myopia prevention and control lens comprising a lens body having a refractive surface, a plurality of spaced diamond-shaped progressive diopterbands, and arc-shaped shaft positions; the lens body is provided with a central spot, and the lens body is formed in a rotationally symmetric manner with respect to the central spot; the plurality ofspaced diamond-shaped progressive refractive bands are arranged on the lens body and surround the central spot, the progressive diopter band is provided with four boundary endpoints symmetric about the central spot, and the progressive diopter band at least comprises the outermost near-visual band and the innermost distance-visual band; the arc-shaped axial positions are disposed at opposite endsof the lens body, and the connection line of the two arc-shaped axial positions passes through the central spot and the two opposite limit end points, wherein the diopter of the near-visual band is set to be -1D, the diopter of the far-visual band is set to be -2.75D, and the diopter of the central spot is set to be -3D. According to the full-focus surface-controlled myopia prevention and controllens in the invention, the lens body is provided with a diamond-shaped progressive diopter band to form a regional change, thereby avoiding generation of a blind zone, and the object can be seen fromany angle, thereby avoiding the troubles of eyestrain and diminution of vision caused by the former progressive multifocal point.

Description

technical field [0001] The invention belongs to the technical field of lenses, and in particular relates to an all-focus surface control myopia prevention and control lens. Background technique [0002] The classification of existing spectacle lens and the defective of each classification are as follows: [0003] 1. Spherical lens design (single focus) [0004] The design concept is outdated, and there is only one prescribed degree, and the prism effect produced by increasing the degree at the edge; the optical geometric center point of the lens gradually increases the degree of light toward the surrounding, the middle field of vision is clear, and the peripheral image is distorted. [0005] 2. Anti-fatigue lens design: [0006] One-half of the focal point of the optical center of the lens is 3 mm above a prescribed degree, and the luminosity of the lens decreases by about 50 to 75 degrees when one-half of the focal point is lowered. Out of focus, the prism effect due to ...

AI Technical Summary

Problems solved by technology

[0008] Asymmetrical design concept, there is a vertical channel in the center of the lens, and the other end of the channel is a constant power field of vision. The principle of folding design, there are astigmatism areas on both sides of the channel, narrow field of view, easy to optic nerve fatigue, disadvantages: there are blind spots, difficult to adapt

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