Functional corneal contact lens and preparation method thereof

A corneal contact lens, functional technology, applied in glasses/goggles, coatings, instruments, etc., can solve the problems of photophobia, blurred vision, artificial iris and pupil size fixation of patients, and achieve correct iris defects, The effect of ensuring wearing comfort

Active Publication Date: 2019-04-12
HAICHANG CONTACT LENSES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iris defect causes the iris to not effectively block the light, so that the light enters the eye and cannot only enter through the pupil, causing the patient to be sensitive to light and blurred vision
[0003] At present, the improvement method of iris defect is mainly surgical implantation of artificial iris, but the risk of surgical implantation is relatively high, and the artificial iris and pupil size are fixed, and the intensity of incident light cannot be adjusted, and the self-adjustment of light intensity is lost. ability

Method used

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  • Functional corneal contact lens and preparation method thereof
  • Functional corneal contact lens and preparation method thereof
  • Functional corneal contact lens and preparation method thereof

Examples

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preparation example Construction

[0034] The present invention also provides a method for preparing a functional contact lens without a protective film described in the above technical solution, comprising the following steps:

[0035] The raw material mixture of the light-blocking layer is printed on the upper mold and / or the lower mold of the mold, and then the raw material mixture of the lens body is injected into the lower mold, and then the molds are closed and cured to obtain a functional contact lens.

[0036] The preparation method provided by the invention does not need to use a new mold, but can directly use the existing mold for preparing corneal contact lenses, and the preparation method is simple, easy to implement, and suitable for industrial production.

[0037] In the present invention, the raw material mixture of the light blocking layer preferably includes a pigment, a first main raw material, a first crosslinking agent, a first initiator, a binder and a solvent; the first main raw material is...

Embodiment 1

[0069] (1) Mix the following materials to obtain the raw material mixture of the light-blocking layer: iron oxide 3wt.%, phthalocyanine blue 3wt.%, hydroxyethyl methacrylate 32wt.%, ethylene glycol dimethacrylate 5wt.%, 32wt.% of 1-vinyl-2-pyrrolidone, 23.7wt.% of cyclopentanone, 1wt.% of n-dodecanethiol and 0.3wt.% of azobisisobutyronitrile; the viscosity of the raw material mixture of the light blocking layer 300000mPa;

[0070] (2) Print the raw material mixture of the light-blocking layer on the upper mold and the lower mold of the mould, the inner diameter of the printed light-blocking layer is 5 mm, and the outer diameter is 12 mm;

[0071] (3) Mix the following materials to obtain the raw material mixture of the lens body: hydroxyethyl methacrylate 98.1wt.%, ethylene glycol dimethacrylate 0.5wt.%, UV416 ultraviolet absorber 1wt.%, C.I. reactive blue 40.05 wt.%, reactive yellow 860.05wt.% and azobisisobutyronitrile 0.0.3wt.%;

[0072] (4) Inject the raw material mixtur...

Embodiment 2

[0076] (1) Mix the following materials to obtain the raw material mixture of the light blocking layer: iron oxide 3wt.%, phthalocyanine green 3wt.%, permanent violet 2.7wt.%, PDMS 30wt.%, SIGMA 30wt.%, ethylene glycol di 5wt.% of methacrylate, 10wt.% of 1-vinyl-2-pyrrolidone, 15wt.% of ethyl lactate, 1wt.% of n-dodecanethiol and 0.3wt.% of benzoyl peroxide; The viscosity of the raw material mixture of the layer is 360000mPa;

[0077] (2) Print the raw material mixture of the light-blocking layer on the upper mold of the mould, the inner diameter of the ring of the light-blocking layer printed is 8mm, and the outer diameter is 12mm;

[0078] (3) Mix the following materials to obtain the raw material mixture of the lens body: PDMS 46wt.%, SIGMA 38wt.%, ethylene glycol dimethacrylate 4.6wt.%, 1-vinyl-2-pyrrolidone 10wt.%, UV416 UV absorber 1wt.%, C.I. reactive blue 40.1wt.% and azobisisobutyronitrile 0.3wt.%;

[0079] (4) Inject the raw material mixture of the lens body obtaine...

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Abstract

The invention belongs to the technical field of corneal contact lenses. The invention provides a functional corneal contact lens which comprises a light-blocking layer and a lens main body; the light-blocking layer is in an annular shape, the light-blocking layer comprises at least one of a front light-blocking layer and a back light-blocking layer, the front light-blocking layer is attached to the front surface of the lens main body, and the back light-blocking layer is attached to the back surface of the lens main body. In the invention, the light blocking layer divides the front surface ofthe functional corneal contact lens into a light blocking area, a central light-transmitting area and an edge light-transmitting area. The light blocking area can prevent light from entering an iridocoloboma area, so that the effect of correcting iridocoloboma is achieved; the central light-transmitting area can ensure that the light enter pupils, so that eyes can view an object; due to the designof the edge light-transmitting area, the wearing comfort of the functional corneal contact lens can be improved.

Description

technical field [0001] The invention relates to the technical field of contact lenses, in particular to a functional contact lens and a preparation method thereof. Background technique [0002] The iris of the eye does not heal normally and will remain open, resulting in the abnormal defect of the pigment of the omentum and choroid at the position of the eye fissure, and sometimes a crack will be formed on the iris. This symptom is clinically called iris defect. The iris defect causes the iris to be unable to effectively block the light, so that the light entering the eye cannot only enter through the pupil, causing the patient to be sensitive to light and blurred vision. [0003] At present, the improvement method of iris defect is mainly surgical implantation of artificial iris, but the risk of surgical implantation is relatively high, and the artificial iris and pupil size are fixed, and the intensity of incident light cannot be adjusted, and the self-adjustment of light ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/20C08F222/14C08J7/04C08L33/14G02C7/04
CPCC08F220/20C08J2333/14C08J2433/14C08J7/0427G02C7/04G02C7/049C08F222/102
Inventor 陈平
Owner HAICHANG CONTACT LENSES
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