Functional eyeglass lens for blocking ultraviolet and blue light

Abstract

The present invention provides a functional eyeglass lens for blocking ultraviolet and blue light, which comprises a mixture of the following materials: a polymerization initiator which reacts with amonomer, which is a raw material of a plastic lens whose refractive index varies depending on physical properties, and which converts the monomer into a polymer; an ultraviolet absorber for absorbingultraviolet from a plastic lens which is mixed with the monomer to then be converted into a polymer; and a transparent material for making the plastic lens, which has been mixed with the monomer and converted into a polymer, transparent by minimizing a phenomenon in which the plastic lens appears yellow, wherein the ultraviolet absorber comprises a mixture of any one or more of UV-A, UV-B and UV-Cwhich are benzotriazole-based ultraviolet absorbers having different molecular weights, and the transparent material is a mixture of a blue dye, showing blue color, and a red dye, showing red color,which is mixed with the monomer at a predetermined ratio.

Description

technical field [0001] The present invention relates to a functional spectacle lens for blocking ultraviolet light and blue light, and more particularly to a functional spectacle lens for blocking ultraviolet light and blue light, which blocks short wavelength ranges that are extremely harmful to the human body and eyes Ultraviolet light and short-wave blue light, thus providing the effect of preventing photophobia, eye fatigue and eye diseases caused by ultraviolet radiation and blue light. Background technique [0002] In general, long-wavelength electromagnetic waves such as the green and red components of visible light, infrared light, microwaves and radio waves have no major harmful effects on the human body or eyes in particular, but examples such as the violet and blue components of visible light, ultraviolet radiation, X-rays and Short-wavelength electromagnetic waves such as gamma rays have extremely harmful effects on the human body; since the above-mentioned X-ray...

AI Technical Summary

Problems solved by technology

However, in these technologies of the prior art, since the tint is given to the lens itself for absorbing ultraviolet radiation and short-wavelength blue light in the visible spectrum by means of adhesion of a polarizing film to the lens and coloring by dyes, except for ultraviolet light In addition to blue light, visible light that is harmless to the human body is also absorbed, and the original hue is invisible, resulting in a significant change in hue and color intensity; The transmittance of the green and red components of the long-wavelength light of 780nm wavelength is also reduced, and when such glasses or lenses are produced and used, if they are worn for a long time, or in the case of frequent detachment, this may lead to a sharp drop in vision problem, and the polarizing film applied to the above-mentioned lenses may often come off or be scratched, so many precautions must be taken with regard to the dyes used for lens tinting, and dye tinting for the production of lenses of standard shade concentrations is difficult, resulting in Various problems in production

[0004] Furthermore, in order to overcome the problems of conventional lenses for blocking ultraviolet radiation and blue light, Korean Patent Application No. 85415 of 2013 (disclosed on July 29, 2013) discloses a method in which a high-refractive-index material and a low-refractive-index material Laminated in multiple layers onto the surface of a plastic material to produce a multilayer film consisting of a functional film laminated between the plastic material and the multilayer film, but because lenses with this composition are difficult to produce and the process is time-consuming, this lead to problems such as high production costs

[0005] As described above, in recent years, functional spectacle lenses for blocking both ultraviolet radiation and blue light have been continuously developed, however, although most of these lenses effectively block short-wavelength ultraviolet radiation of 380 nm or less, they are about 380-400nm long-wavelength UV radiation is much less absorbing and they are highly transparent to 380-400nm UV radiation, thus creating potential eye damage issues, and are manufactured to block this UV radiation and In the lens of both blue light, problems such as yellowing of the lens itself occur, and the result is distortion of natural light

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