KR102008138B1 - The Method for Contact Lens Blocking Blue Light and Contact Lens Blocking Blue Light - Google Patents

Abstract

The present invention relates to a blue light-blocking contact lens and a method of manufacturing the same. According to the present invention, the method comprises: a first step of coating a blue light-blocking dye on a silicone pad in a pupil shape; a second step of injecting a stirred lens raw material into a lower mold; a third step of pressing an upper mold and the lower mold, and injecting the pressed upper and lower molds into a thermal oven of 120°C to polymerize the stirred lens raw material for 60 to 90 minutes; and a fourth step of separating the upper and lower molds to obtain a contact lens, hydrating the contact lens with a physiological saline containing 0.9% of sodium chloride for 20 to 25 hours, and preserving the hydrated contact lens in a contact lens preservation solution. According to the present invention, the method can prevent eyesight deterioration by blocking a blue light wavelength range of 400 to 450 nm affecting retina, and can prevent a risk of damaging to the retina or crystalline lens by minimizing factors that may cause eye strain, headache, and macular degeneration. Further, the method has an effect of securing safety by pad-printing a front portion of the lens to a pupil size with the blue light-blocking dye, thereby preventing the front portion of the lens pad-printed with the blue light-blocking dye from being directly brought into contact with the eye. Further, the method has an effect of preventing the environment that may have an effect on a cycle of biological rhythms or hormone secretion by being excessively exposed to a light source having blue light generated therefrom at night.

Description

Blue light blocking contact lens and manufacturing method {The Method for Contact Lens Blocking Blue Light and Contact Lens Blocking Blue Light}

The present invention relates to a method for manufacturing a blue light blocking contact lens, and more specifically, by printing a pad on the front of the lens without putting the blue light blocking dye into the lens material, blocking the blue light wavelength band of 400 to 450 nm affecting the retina. The present invention relates to a blue light blocking contact lens and a method for manufacturing the same, which can prevent deterioration and remove eye fatigue, headache and macular degeneration.

In general, light can be classified into ultraviolet light, visible light, and infrared light according to the wavelength. Visible light is commonly seen by the human eye, and the wavelength of visible light is in the range of 380 to 780 nm. Among these, the blue light existing between 400 and 490 nm is classified into blue light, which is a blue light. In recent years, as the use of electronic devices has increased due to changes in living environment, research on the harmful effects of human beings is being conducted as it is exposed to blue light emitted from displays and LED lighting devices of smart devices such as TVs and computers. Some studies have also suggested that long exposure to blue light can increase eye fatigue, cause dry eye, and, in severe cases, damage the retina or lens in the eye, and continue to be affected by light sources that produce blue light at night. There is an opinion that exposure can also affect changes in biorhythm cycle or hormone secretion.

To solve this problem, the blue light blocking lens of the present invention disclosed in Korean Patent Publication No. 10-1540114 disperses and diffuses blue light in a range of 380 nm to 500 nm in a monomer, which is a raw material used when manufacturing a plastic lens. Blue light blocking lens and a method for manufacturing the same, which are formed by mixing a blue light-emitting agent made of a compound of thiophene and benzene to block the lens transmission. It is.

However, the above-mentioned blue light blocking lens and its manufacturing method are related to the manufacture of plastic lenses, and this is an invention for use for general spectacle lenses, which makes it difficult to use as a contact lens manufacturing method.

Republic of Korea Patent Publication No. 10-1540114 (2015.07.22)

In order to solve the above problems, pad printing a blue light blocking dye on the transparent contact lens in front of the lens for contact lenses, not for general eyeglass lenses, to secure the stability of the part directly contacting the eyes and blocking rate according to the blocking dye content An object of the present invention is to provide an adjustable blue light blocking contact lens and a manufacturing method.

In order to achieve the object, in the method of manufacturing a blue light blocking contact lens, the first step of dipping the blue light blocking dye into the silicon pad in a pupil shape and the second step of putting the stirred lens material into the lower mold and the upper mold and After pressing the lower mold and placing it in a 120 ° C. hot oven, the third step of polymerization for 60 to 90 minutes and the upper mold and the lower mold were separated to obtain contact lenses, and then hydrated in 0.9% saline solution for 20 to 25 hours. The fourth step is to store the contact lens solution.

Another feature of the present invention is pad printing a blue light blocking dye for the blue light blocking function in the front of the lens to the pupil size to ensure direct stability not to come in direct contact with the eye.

Another feature of the present invention is to control the blue light blocking rate according to the mixed weight ratio of the blue light blocking dye, it is possible to manufacture in various shapes according to the pad shape when printing the pad.

As described above, the blue light blocking contact lens and manufacturing method by blocking the blue light wavelength band of 400 ~ 450nm affecting the retina to prevent vision loss and to minimize the factors that can cause eye fatigue, headache, and macular degeneration There is an effect that can prevent the risk of damage to the retina or lens. In addition, excessive exposure to a light source generating blue light at night can prevent an environment that may affect the biorhythm cycle or hormone secretion.

1 is a flowchart illustrating a method for manufacturing a blue light blocking contact lens according to a preferred embodiment of the present invention.
2 is a contact lens size and a blue light blocking function portion size according to a preferred embodiment of the present invention.
3 is a blue light blocking result when the blue light blocker content is 10% by weight according to a preferred embodiment of the present invention.
4 is a blue light blocking result when the blue light blocker content is 0.3% by weight according to a preferred embodiment of the present invention.
5 is a blue light blocking result when the blue light blocker content is 0.6% by weight according to a preferred embodiment of the present invention.
6 is a blue light blocking result when the blue light blocker content is 1.0% by weight according to a preferred embodiment of the present invention.
7 is a blue light blocking result when the blue light blocker content is 2.0% by weight according to a preferred embodiment of the present invention.
8 is a blue light blocking result when the blue light blocker content is 4.0% by weight according to a preferred embodiment of the present invention.
9 is a blue light blocking result when the blue light blocker content is 20.0% by weight according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail.

1 is a flowchart illustrating a method for manufacturing a blue light blocking contact lens according to the present invention, which will be described below with reference to the detailed configuration of the present invention.

In the blue light blocking contact lens manufacturing method,

A first step (S10) of dipping a blue light blocking dye into a silicon pad in a pupil shape; and

A second step (S20) of putting the stirred lens material into the lower mold; and,

Compressing the upper mold and the lower mold and placing it in a heat oven at 120 ° C. for a polymerization process for 60 to 90 minutes (S30); and,

After separating the upper mold and the lower mold to obtain a contact lens, and then hydrated in 0.9% physiological saline for 20 to 25 hours, and then stored in a contact lens preservation solution (S40); blue characterized in that consisting of A light blocking contact lens manufacturing method.

In addition, the lens material is hydrophilic monomer 2-Hydroxyethyl methacrylate (HEMA) 95.2 ~ 95.70% by weight, Methacrylic acid (MA) 1.80 ~ 2.50% by weight, crosslinking agent Ethylene glycol Dimethacrylate (EGDMA) 0.30 ~ 0.70% by weight, initiator 2,5- Dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane (LUPEROX 256) 0.20 ~ 0.60% and UV blocker 2- [3- (2H-Benzotriazol-2-yl) -4-hydroxyphenyl] ethyl methacrylate The mixture is prepared by stirring at 200 rpm for 30 minutes. In addition, the first step of dipping the blue light blocking dye onto the silicon pad is to print the blue light blocking dye on the front of the lens, and to print the pad on the front of the lens without putting the blue light blocking dye on the transparent contact lens. It is characterized by improving the safety and can control the blocking rate according to the content of the blue light blocking dye, it is possible to manufacture a lens that can be optimized for eyestrain or eyesight of the user.

In the blue light blocking dye, 25% by weight of polyvinyl pirrolidone (PVP) binder and blue which can be moistened with a wet polymer together with 35% by weight of the wet urethane which gives elasticity to the lens, absorbs moisture and binds pigments. Light Blocker 4-[(E) -phenyldiazenyl] phenyl-2-methacrylate Synonyms: Add 10% by weight of 4- (phenyldiazenyl) phenyl-2-methacrylate, at this time, 1 ~ 70% blue light depending on the Blue light Blocker content. Blocking rate can be adjusted, it is characterized in that it is prepared using 30% by weight of Cyclohexanone, Cyclopentanone as a solvent to give a suitable viscosity to the pad printing. The weight percentage of the binder, blue light blocker and solvent may be adjusted differently from the embodiment to provide the user with optimized functions.

2 is a view illustrating a contact lens size and a size of a blue light blocking function in a blue light blocking contact lens and a manufacturing method according to the present invention.

The blue light blocking function is provided only in the contact lens pupil area, and the contact lens size is 14.0 ~ 14.5mm, and the range of the blue light blocking dye is printed on the front of the contact lens to block the blue light. Set the blocking function part size to 2 ~ 10mm. This is because the average person's pupil size is 2 ~ 6mm, but when the pupil suddenly goes to a dark space, the pupil grows to 10mm when undergoing a dark adaptation process to visually adapt.

In the lens range that provides the blue light blocking function, the blue light blocking dye is transferred to the lower mold through pad printing, and at this time, it is characterized in that it is manufactured in the shape of a circle, oval, square, square, star, according to the shape of the pad.

3 to 9 show the blue light blocking result of the wavelength range of 400 ~ 450nm while giving a change of the blue light blocker content according to a preferred embodiment of the present invention, the results for the blue light blocking rate according to the change of the blue light blocker content is It looks like this:

Blue light blocker
content(%)
0.3 0.6 1.0 2.0 4.0 10.0 20.0
Blue light
% Blocked
3.06 7.89 9.92 13.53 26.93 35.06 75.18

While the invention has been shown and described with respect to specific embodiments and applications, it is common in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone who has a can easily know.

S10. First stage
S20. 2nd step
S30. 3rd step
S40. 4th step

Claims (6)

In the blue light blocking contact lens manufacturing method,
A first step (S10) of dipping a blue light blocking dye into a silicon pad in a pupil shape; and
A second step (S20) of putting the stirred lens material into the lower mold; and,
Compressing the upper mold and the lower mold and placing it in a heat oven at 120 ° C. for a polymerization process for 60 to 90 minutes (S30); and,
After separating the upper mold and the lower mold to obtain a contact lens, and then hydrated in 0.9% physiological saline for 20-25 hours in sodium chloride and then stored in a contact lens preservation solution (S40);
The lens material is hydrophilic monomer 2-Hydroxyethyl methacrylate (HEMA) 95.2 ~ 95.70% by weight, Methacrylic acid (MA) 1.80 ~ 2.50% by weight, crosslinking agent Ethylene glycol Dimethacrylate (EGDMA) 0.30 ~ 0.70% by weight, initiator 2,5-Dimethyl- 2,5-di (2-ethylhexanoylperoxy) hexane (LUPEROX 256) 0.20 ~ 0.60% and UV blocker 2- [3- (2H-Benzotriazol-2-yl) -4-hydroxyphenyl] ethyl methacrylate Mix and stir at 200 rpm for 30 minutes,
In the first step of dipping the blue light blocking dye into the pupil shape on the silicon pad, pad printing is performed on the front of the lens.
The blue light blocking dye is 25% by weight of polyvinyl pirrolidone (PVP) and blue light blocker 4-[( E) -phenyldiazenyl] phenyl-2-methacrylate Synonyms: Add 30% by weight of 4- (phenyldiazenyl) phenyl-2-methacrylate and use 30% by weight of Cyclohexanone and Cyclopentanone as solvents to impart proper viscosity to pad printing. Blue light blocking contact lens manufacturing method characterized in that the blue light blocking rate can be adjusted according to the content change. delete delete delete The method of claim 1,
When printing the blue light blocking dye on the front of the lens pad, the corresponding range is 2 ~ 10mm for the blocking function to fit the size of the human pupil, and it is optional among round, oval, square, triangular and star shapes according to the pad shape. Blue light blocking contact lens manufacturing method, characterized in that for printing. Blue light blocking contact lens produced by the method of any one of claims 1 and 5.

Images