Invisible one-line bifocal lens

Abstract

The invention discloses an invisible one-line bifocal lens, and belongs to the technical fields of glasses. The invisible one-line bifocal lens comprises a convex spherical surface, an outer circle, an upper light area, a lower light area, a first transition area, a second transition area and a channel connecting line, wherein the upper light area, the lower light area, the first transition area,the second transition area and the channel connecting line form a lens internal structure, the outer circle is arranged outside an area formed by the upper light area, the lower light area and the convex spherical surface, the upper light area is arranged at the upper portion of the lower light area, and the first transition area and the second transition area are respectively arranged in an areaformed between the upper light area and the lower light area. According to the invention, two transition areas are arranged between an upper light area and a lower light area, so that when sight is switched from hyperopia to shortsightedness or from shortsightedness to hyperopia, the problems of image jump and image abrupt change are avoided; the area of the upper light area and the area of the lower light area are large, so that the range is wide, and sight is clear; and the upper light area and the lower light area adopt flat arc and arc transition, no obvious abrupt feeling exists, and theappearance is not different from that of a common lens.

Description

Technical field [0001] The present invention relates to the technical field of glasses, in particular to a contactless first-line bifocal lens. Background technique [0002] Glasses, also called contact lenses, are lenses worn on the cornea of ​​the eye to correct vision or protect the eyes. According to the hardness of the material, it includes three types: hard, semi-hard, and soft. Glasses not only bring great improvements to patients with refractive errors such as myopia, hyperopia, and astigmatism in terms of appearance and convenience. Moreover, it has a wide field of vision and lifelike vision. In addition, it has a special effect in controlling the development of myopia and astigmatism in adolescents, and treating special eye diseases. [0003] The distance between hyperopia and nearsightedness of the existing lenses on the market is relatively small, resulting in the problem of image jumping and sudden changes in images when switching from hyperopia to nearsightedness or...

AI Technical Summary

Problems solved by technology

[0003] The far-sighted area and the near-sighted area of ​​the existing lenses on the market are smaller, resulting in image jump and image mutation problems when switching from hyperopia to myopia or from myopia to hyperopia during use

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