CN108803077B - Contact lens for correcting achromatopsia and manufacturing method thereof - Google Patents

Abstract

A color blindness and color weakness correction contact lens and a manufacturing method thereof relate to the technical field of contact lenses. The color blindness color weakness correction contact lens includes an outer layer, an intermediate layer, a color blindness correction film and an inner layer, and the manufacturing method of the color blindness color weakness correction contact lens mainly includes three. Major steps, step 1, use a mold to make the middle layer and inner layer, step 2, make a layer of OCA optical glue adhere to both sides of the color blindness correction film, step 3, put the middle layer, color blindness correction film, inner layer with the upper layer. The composite body is compounded in the order from the bottom to the bottom, and the upper surface of the compound body is molded and covered with an outer surface layer, so that the lens is formed. The achromatopsia and achromatopsia correction contact lenses produced by the method for producing the colorblind and colorweakness correction contact lenses of the present invention have good colorblind and colorweakness correction effects and high stability.

Description

A color blindness and color weakness correction contact lens and method of making the same

technical field

The invention relates to the technical field of contact lenses, in particular to a color blindness and color weakness correction contact lens and a manufacturing method thereof.

Background technique

Achromatopsia is a congenital visual disorder that cannot 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 method in the world. Wear glasses to correct it.

The traditional glasses for color blindness are mainly frame-type color-blind glasses. Such frame-type color-blind glasses are coated with a film with a color-blind correction effect on the surface of ordinary frame glasses. Colorblindness correction glasses for improving the transparency of lenses", the glasses are plated with a colorblindness correction film on the lenses, and further, the patent document with the application number CN200810038760 discloses "colorblindness correction glasses", the glasses are plated on the inner side of the lens with a correcting spectral curve coating layer. The above-mentioned traditional frame-type color blindness glasses are relatively simple to make and have a more significant color-blind correction effect. However, such frame-type color-blind glasses, like ordinary frame glasses, have greater limitations, which affect the appearance and are not suitable for certain occasions. Use, for example: to participate in a performance.

In view of the aforementioned reasons, colorblind contact lenses are gradually coming out on the market. The existing colorblind contact lenses are mainly divided into two structures. First, a colorblind correction film is plated on the outer surface of ordinary contact lenses. The production process is very simple, but because the colorblindness correction film of this kind of glasses is often in contact with external substances such as air and cleaning solution, it is easily damaged, thereby affecting the correction effect of the colorblindness correction film. Therefore, the stability of this colorblind contact lens Not good, the service life is short; secondly, the color blind contact lens adopts a three-layer sandwich structure. The glasses include an outer layer, a color blindness correction film and an inner surface layer in order from top to bottom. A layer of colorblindness correction film is printed, and finally the inner surface layer is injected over the colorblindness correction film. The size specifications of the colorblind contact lenses produced by this production method can be well controlled. The surface of the colorblind correction film is prone to irregular ripples, which cannot be processed in the later stage, thus affecting the overall colorblind correction effect. If it is colorblind and myopia contact lenses, it will also affect the overall refractive correction.

SUMMARY OF THE INVENTION

The invention provides a color-blind color-weakness correction contact lens and a manufacturing method thereof. The color-blind color-weakness correction effect and high stability of the contact lens produced by the method are provided.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a method for making a color blindness and color weakness correction contact lens, the contact lens includes an outer layer, an intermediate layer, a color blindness correction film and an inner layer, and the production process of the contact lens includes the following step:

In step 1, the middle layer and the inner layer are made by mold forming, the lower surface of the middle layer is matched with the upper surface of the inner layer, the lower surface of the middle layer is a concave arc surface, and the upper surface of the inner layer is is a convex arc surface;

Step 2: Take No. 1 release film, No. 2 release film and No. 3 release film, vacuum coat a layer of colorblind correction film on the surface of No. 1 release film, and place the No. 2 release film and No. The surface of the No. 1 release film is coated with a layer of OCA optical adhesive, the OCA optical adhesive on the No. 2 release film is adhered to the upper surface of the color blindness correction film under vacuum conditions, and the color blindness correction film is peeled off from the No. 1 release film down, and then adhere the OCA optical adhesive on the No. 3 release film to the lower surface of the color blindness correction film under vacuum conditions;

Step 3, first peel off the No. 3 release film, bond the lower surface of the color blindness correction film and the upper surface of the inner layer together through the OCA optical glue on the lower surface of the color blindness correction film, and then tear off the No. 2 release film, pass The OCA optical glue on the upper surface of the colorblindness correction film bonds the upper surface of the colorblindness correction film to the lower surface of the intermediate layer, so that the intermediate layer, the colorblindness correction film, and the inner layer are compounded into a complex in the order from top to bottom, and finally The composite is placed in a mold, and the outer surface of the composite is molded to cover the outer surface using the mold, thereby forming a lens.

Further, the release force between the No. 1 release film and the color blindness correction film is less than the release force between the No. 2 release film and the OCA optical adhesive, and the release force between the No. 3 release film and the OCA optical adhesive is The release force is also less than the release force between No. 2 release film and OCA optical adhesive.

Further, the light transmittance of the OCA optical adhesive exceeds 90%, and the thickness of the OCA optical adhesive is not greater than 0.005 mm.

Further, in step 3, after the middle layer, the color blindness correction film, and the inner layer are composited into a composite body, the composite body is subjected to a polymerization curing treatment by means of room temperature curing or light curing.

Further, in step 1, the prepared intermediate layer and inner layer are subjected to hydration treatment, and in step 3, the formed lens is also subjected to hydration treatment.

Further, the color blindness correction film is adhered to the middle of the intermediate layer and the inner layer, and the area of the color blindness correction film is not larger than the area of the lower surface of the intermediate layer.

Preferably, the color blindness correction film is a circular film, and the diameter of the circular film is equal to the diameter of the pupil of the human eyeball.

Alternatively, the color blindness correction film is an annular film, the inner diameter of the annular film is 1/2 of the diameter of the pupil of the human eyeball, and the outer diameter is equal to the diameter of the pupil of the human eyeball.

As another aspect of the present invention, a color blindness and color weakness correction contact lens is produced by using the above-mentioned manufacturing method of a color blind color weakness correction contact lens.

The invention provides a color blindness and color weakness correction contact lens and a manufacturing method thereof. In the manufacturing method of the present invention, the outer layer, the middle layer and the inner layer are separately injection-molded, which can effectively ensure the structural stability of the three, and the lower surface of the middle layer is Fits with the upper surface of the inner layer, the lower surface of the middle layer is a concave cambered surface, and the upper surface of the inner layer is an outwardly convex cambered surface. The form is bonded between the middle layer and the inner layer. Since the shape of the arc surface is similar to the shape of the human eyeball, the colorblindness correction film can better play the role of colorblindness correction; in addition, in the production method of the present invention, there is no direct The color blindness correction film is plated on the OCA optical adhesive, but the color blindness correction film is first plated on the release film and then adhered to the OCA optical adhesive. This method can effectively ensure the flatness of the surface of the color blindness correction film; secondly, using The OCA optical adhesive has the characteristics of strong adhesion. The color blindness correction film is firmly bonded between the middle layer and the inner layer. The three form a composite body, and the outer surface layer is used to wrap the outer surface layer of the composite body. In this way, it can effectively Prevent the colorblindness correction film from being eroded and damaged by external substances, and ensure the stability of the correction effect of the colorblindness correction film; finally, in the above production process, it should be emphasized that the OCA optical adhesive has a light transmittance of more than 90%, even as high as 95% %, it is glued in the lens, which will basically not affect the transmission of light. It can be seen from the above that, compared with the prior art, the achromatopsia and achromatopsia correction contact lenses made by the method for producing a colorblind and achromatopsia correction contact lenses according to the present invention not only have a good colorblindness correction effect, but also have high stability. .

Description of drawings

Fig. 1 is the longitudinal sectional view of the color blindness correction contact lens involved in the present invention;

Fig. 2 is the enlarged view of A part among Fig. 1;

3 is a cross-sectional view of the color blindness correction film produced in step 2 of the present invention.

The reference numbers are:

1 - middle layer 2 - inner layer 3 - color blindness correction film

4——Outer layer 5——OCA optical adhesive 6——No.2 release film

7 - No. 3 release film.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

1 and FIG. 2 are related structural diagrams of a color blindness and color weakness correction contact lens manufactured by using the method for manufacturing a color blindness color weakness correction contact lens according to the present embodiment, the contact lens includes an outer layer 4, an intermediate layer 1, a color blindness Correction film 3 and inner layer 2, the manufacturing process of this contact lens comprises the following steps:

In step 1, the middle layer 1 and the inner layer 2 are made by mold forming, the lower surface of the middle layer 1 is matched with the upper surface of the inner layer 2, the lower surface of the middle layer 1 is a concave arc surface, and the upper surface of the inner layer 2 is is a convex arc surface;

Step 2: Take No. 1 release film, No. 2 release film 6 and No. 3 release film 7, vacuum coat a layer of color blindness correction film 3 on the surface of No. 1 release film, and release to No. 2 under vacuum conditions. The surface of film 6 and No. 3 release film 7 is coated with a layer of OCA optical glue 5, and the OCA optical glue 5 on No. 2 release film 6 is adhered to the upper surface of color blindness correction film 3 under vacuum conditions and the color blindness is corrected. The film 3 is peeled off from the No. 1 release film, and then the OCA optical adhesive 5 on the No. 3 release film 7 is adhered to the lower surface of the color blindness correction film 3 under vacuum conditions; as shown in Figure 3, the color blindness correction film 3 OCA optical adhesive 5 is bonded to the upper and lower surfaces of the

Step 3, first peel off the No. 3 release film 7, bond the lower surface of the color blindness correction film 3 and the upper surface of the inner layer 2 together through the OCA optical glue 5 on the lower surface of the color blindness correction film 3, and then tear off the No. 2 The release film 6 is used to bond the upper surface of the color blindness correction film 3 and the lower surface of the intermediate layer 1 together through the OCA optical glue 5 on the upper surface of the color blindness correction film 3, so that the intermediate layer 1, the color blindness correction film 3, the inner layer 2 The composite body is composited in the order from top to bottom, and finally the composite body is placed in the mold, and the outer surface layer 4 is formed on the outer surface of the composite body using the mold, so that the lens is formed. arrangement between layers.

In the prior art, there are various manufacturing methods for adhering the OCA optical glue 5 on the color blindness correction film 3. The most common method is to directly coat the color blindness correction film 3 on the OCA optical adhesive 5. Although this method is simple, it The surface flatness of the produced color blindness correction film 3 is not good, because, from a microscopic point of view, the surface of the OCA optical adhesive is a frosted surface, and it is difficult to ensure the flatness of the film by coating on the frosted surface. , first coat the color blindness correction film 3 on the No. 1 release film, and then adhere the OCA optical glue of the No. 2 release film to the color blindness correction film 3. The release film has the characteristics of smoothness and flatness, which can effectively ensure color blindness. The flatness of the surface of the correction film 3, the smoother the surface of the color blindness correction film 3, the better the color blindness correction effect.

In the manufacturing method of the above embodiment, it should also be noted that, since the inner layer 2 is a soft arc-shaped body, in order to ensure that the inner layer 2 is not deformed or displaced during the process of bonding with the color blindness correction film 3, no In order to affect the adhesion accuracy with the color blindness correction film 3, the inner layer 2 should be placed on a fixed seat with a curved top surface or other precision machinery should be used to position the inner layer 2 before operation. 2 The contact surfaces of the two are in close contact with each other.

Further, the release force between the No. 1 release film and the color blindness correction film 3 is less than the release force between the No. 2 release film 6 and the OCA optical adhesive 5, and the release force between the No. 3 release film 7 and the OCA optical adhesive 5 The release force between the two is also smaller than the release force between the No. 2 release film 6 and the OCA optical adhesive 5 .

Further, the light transmittance of the OCA optical adhesive 5 in the above embodiment is 95%, and the thickness is 0.002 mm.

Further, in step 3, the intermediate layer 1, the color blindness correction film 3, and the inner layer 2 are composited into a composite body, and then the composite body is subjected to polymerization curing treatment by means of room temperature curing or light curing.

Further, in step 1, the fabricated intermediate layer 1 and inner layer 2 are subjected to hydration treatment, and in step 3, the formed lens is also subjected to hydration treatment.

Still further, the color blindness correction film 3 is adhered to the middle of the intermediate layer 1 and the inner layer 2 , and the area of the color blindness correction film 3 is smaller than the area of the lower surface of the intermediate layer 1 .

Preferably, the color blindness correction film 3 is a circular film, and the diameter of the circular film is equal to the diameter of the pupil of the human eyeball.

Alternatively, the color blindness correction film 3 is an annular film, the inner diameter of the annular film is 1/2 of the diameter of the pupil of the human eyeball, and the outer diameter is equal to the diameter of the pupil of the human eyeball.

The above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways, and any obvious replacements are within the protection scope of the present invention without departing from the concept of the technical solution.

In order to make it easier for those skilled in the art to understand the improvements of the present invention relative to the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are also omitted in this application document, One of ordinary skill in the art would realize that these omitted elements may also constitute the subject matter of the present invention.

Claims (7)

1. a preparation method of achromatopsia color weakness correction contact lens, is characterized in that, described contact lens comprises outer layer, middle layer, colorblind correction film and inner layer, and the manufacture process of this contact lens may further comprise the steps: In step 1, the middle layer and the inner layer are made by mold forming, the lower surface of the middle layer is matched with the upper surface of the inner layer, the lower surface of the middle layer is a concave arc surface, and the upper surface of the inner layer is is a convex arc surface; Step 2: Take No. 1 release film, No. 2 release film and No. 3 release film, vacuum coat a layer of colorblind correction film on the surface of No. 1 release film, and place the No. 2 release film and No. The surface of the No. 1 release film is coated with a layer of OCA optical adhesive, the OCA optical adhesive on the No. 2 release film is adhered to the upper surface of the color blindness correction film under vacuum conditions, and the color blindness correction film is peeled off from the No. 1 release film Then, adhere the OCA optical glue on the No. 3 release film to the lower surface of the color blindness correction film under vacuum conditions; the release force between the No. 1 release film and the color blindness correction film is smaller than that of the No. 2 release film The release force between the No. 3 release film and the OCA optical adhesive is also smaller than the release force between the No. 2 release film and the OCA optical adhesive; the OCA optical adhesive The light transmittance exceeds 90%, and the thickness of the OCA optical adhesive is not more than 0.005mm; Step 3, first peel off the No. 3 release film, bond the lower surface of the color blindness correction film and the upper surface of the inner layer together through the OCA optical glue on the lower surface of the color blindness correction film, and then tear off the No. 2 release film, pass The OCA optical glue on the upper surface of the colorblindness correction film bonds the upper surface of the colorblindness correction film to the lower surface of the intermediate layer, so that the intermediate layer, the colorblindness correction film, and the inner layer are compounded into a complex in the order from top to bottom, and finally The composite is placed in a mold, and the outer surface of the composite is molded to cover the outer surface using the mold, thereby forming a lens. 2. the making method of color blindness and color weakness correction contact lenses according to claim 1, is characterized in that: in step 3, adopt the mode of normal temperature curing or light curing after intermediate layer, color blindness correction film, inner layer are compounded into composite body. The composite is subjected to polymerization curing treatment. 3. the making method of color blindness and color weakness correction contact lenses according to claim 2, is characterized in that: in step 1, the intermediate layer and inner layer that are made are carried out hydration treatment, in step 3, will be molded The lenses are also hydrated. 4. The method for making contact lenses for color blindness correction according to claim 3, wherein the color blindness correction film is adhered to the middle of the intermediate layer and the inner layer, and the area of the color blindness correction film is not greater than the area of the intermediate layer. area of the lower surface. 5 . The method of claim 4 , wherein the color blindness correction film is a circular film, and the diameter of the circular film is equal to the diameter of a human eye pupil. 6 . 6 . The method for producing a color blindness correction contact lens according to claim 4 , wherein the color blindness correction film is an annular film, and the inner diameter of the annular film is 1/2 of the diameter of a human eye pupil. 7 . 7. A color blindness and color weakness correcting contact lens, characterized in that: it is produced by using the manufacturing method of the color blind color weakness correcting contact lens described in any one of claims 1-6.

Images