Out-of-focus spectacle lens

Abstract

The invention belongs to the technical field of ocular vision, and particularly relates to an out-of-focus spectacle lens. The out-of-focus spectacle lens is formed by completely immersing a plurality of small transparent spheres made of materials such as glass or plastics in a conventional formula lens, and can be obtained by heating and curing a thermosetting material by using a mould pressing casting molding method or by using injection molding of the thermoplastic material; the refractive index of the small sphere is not completely the same as the refractive index of the lens substrate, so that an optical out-of-focus function is realized as required; when eye axis growth needs to be inhibited, namely myopia is controlled, the refractive index of the small sphere is greater than that of the substrate; when eye axis growth needs to be promoted, namely hyperopia is controlled, the refractive index of the small sphere is smaller than that of the substrate. The outer surface of the lens is completely not different from that of a common lens, the surface is smooth, and the lens is suitable for wearing. The mold is easy to machine and can be compatible with an original manufacturing mold.

Description

technical field [0001] The invention belongs to the technical field of ophthalmology and optics, and specifically relates to a defocused spectacle lens. Background technique [0002] With the application of electronic equipment and the increase of close-range workload such as coursework, the incidence of refractive errors among adolescents is increasing year by year. Myopia or hyperopia are two typical refractive errors. For myopia, it is mainly due to the rapid growth of the axial length of the eye, and for hyperopia, the opposite is true. Myopia is currently the most common refractive error. According to incomplete statistics, the myopia incidence rate of primary school students in my country is about 30%, about 60% for junior high school students, about 80% for high school students, and as high as 90% for college students. After research in the optometry industry, the defocus theory was proposed, pointing out that when ordinary single-vision lenses are used to correct v...

AI Technical Summary

Problems solved by technology

[0004] However, the surface microstructure is used to realize the intuitive principle. The disadvantage is that the surface precision is very high, and the production is difficult. Because of the microstructure on the surface, the surface is discontinuous and smooth, and the surface is uneven. It is used for anti-reflection on the surface. , Coating with hardening effect is inconvenient

Moreover, due to the microstructure on the surface, the surface of the lens is more likely to be worn and stained during use, which will affect the effect. In severe cases, the protrusions will be scratched and cannot transmit light well, which will cause form deprivation effect and aggravate myopia.

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