Ring focus spectacle lens for controlling myopia progression, and manufacturing method therefor

Abstract

A ring focus spectacle lens () for controlling the progression of myopia, and a manufacturing method therefor. The ring focus spectacle lens () can provide clear vision for a patient, and also has a plurality of ring-shaped defocusing zones to provide an optical defocusing effect. Since there is no joint between successive concentric rings of different optical powers that are tangent to each other, the ring focus spectacle lens () is as aesthetic as a common spectacle lens. In the manufacturing method, three front mold cores (), a rear mold core (), and a planar rear mold core are used to manufacture a series of ring focus spectacle lenses () having different powers, thereby reducing the number of mold cores and the production cost. In addition, for the requirements of individuals with severe myopia and astigmatism, a semi-finished lens is provided by means of the manufacturing method, which not only greatly reduces the number of mold cores, but also reduces the inventory quantity of desired lenses, thereby reducing costs.