A kind of contact lens for color blindness and color weakness correction and its manufacturing method

Abstract

The invention discloses a pair of contact lenses for correcting color blindness and color amblyopia and a manufacturing method thereof, and relates to the technical field of contact lenses. The pair of contact lenses for correcting the color blindness and color amblyopia comprises outer layers, middle layers, color blindness correcting films and inner layers. The manufacturing method of the pair of contact lenses for correcting the color blindness and color amblyopia mainly comprises three steps of step 1, manufacturing the middle layers and the inner layers by a mold; step 2, respectively sticking OCA optical glue to both sides of each color blindness correcting film; step 3, sequentially compounding each middle layer, each color blindness correcting film and each inner layer from top tobottom to form a compounding body, and forming and coating each outer layer to the upper surface of the corresponding compounding body, thereby forming the lenses. The pair of contact lenses for correcting the color blindness and color amblyopia manufactured by the manufacturing method has the advantages that the color blindness and color amblyopia correcting effect is good, and the stability is high.

Description

technical field [0001] The invention relates to the technical field of contact lenses, in particular to a contact lens for correcting color blindness and color weakness and a manufacturing method thereof. Background technique [0002] Color blindness and color weakness is a kind of congenital visual impairment. It can not distinguish or is difficult to distinguish one or more colors. It will bring a lot of inconvenience to patients. At present, there is no effective treatment in the world. Patients with color blindness and color weakness can only use Wear glasses to correct it. [0003] Traditional color-blind glasses are mainly frame-type color-blind glasses. This type of frame-type color-blind glasses is coated with a film with a color-blindness correction effect on the surface of ordinary frame glasses. A kind of color-blindness correction glasses that improve the transparency of the lens", the glasses are coated with a color-blindness correction film on the lens, and th...

AI Technical Summary

Problems solved by technology

The above-mentioned traditional frame-type color-blind glasses are relatively simple to make, and the effect of color-blindness correction is also more significant, but this type of frame-type color-blind glasses, like ordinary frame glasses, has relatively large limitations, which affect the appearance, and are not suitable for certain occasions. Use, eg: attend a show

[0004] In view of the aforementioned reasons, color-blind contact lenses are gradually coming out on the market. The structures of existing color-blind contact lenses are mainly divided into two types. The production process is very simple, but because the color-blindness correction film of this kind of glasses is often in contact with external substances such as air and cleaning fluid, it is easy to be damaged, thereby affecting the correction effect of the color-blindness correction film. Therefore, the stability of this kind of color-blindness contact lens Not good, the service life is short; Second, the color-blind contact lens adopts a three-layer sandwich structure. Print a layer of color-blindness correction film, and finally inject the inner surface layer on top of the color-blindness correction film. The size and specifications of the color-blind contact lenses produced by this production method can be well controlled, but in the process of injection molding the inner surface layer, due to the heat-melting state The surface of the color blindness correction film is easy to produce irregular ripples, which cannot be processed in the later stage, thus affecting the overall color blindness correction effect. If it is a color blindness myopia contact lens, it will also affect the overall refractive correction.

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