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Production method of hard cornea contact lens

A corneal contact and production method technology, applied in glasses/goggles, instruments, household appliances, etc., can solve the problems of corneal wear, eye discomfort, low oxygen permeability, etc., to improve product productivity and solve the effect of long processing cycle

Inactive Publication Date: 2018-05-25
HAICHANG CONTACT LENSES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The earliest developed lens material is polymethyl methacrylate, which is a rigid contact lens. Due to its hard material, it is easy to wear the cornea, has poor wettability, and low oxygen permeability. It is easy to cause eye discomfort when worn. , has been basically eliminated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for making a rigid contact lens, comprising the steps of:

[0022] A. Mold design and processing: design the lens parameters required for rigid contact lenses, and use precision lathes to process the molds required for lenses;

[0023] B. Preparation of polymeric materials for hard contact lenses; pretreatment with polysiloxane material as the main material and other monomers or compounds, including mixing, prepolymerization or grafting;

[0024] C. Molding of hard contact lenses: use a mold with designed product parameters for hard contact lenses, and perform polymerization under photocuring or thermal curing conditions to form the required lenses;

[0025] D. Subsequent processing: a combination of one or more steps in mold opening, cleaning, testing, packaging, and disinfection.

[0026] The mold material in the step A is crystal.

[0027] In the step B, the siloxane material refers to a class of polymers with repeated Si-O bonds as the main chain and orga...

Embodiment 2

[0033] A method for making a rigid contact lens, comprising the steps of:

[0034] A. Mold design and processing: design the lens parameters required for rigid contact lenses, and use precision lathes to process the molds required for lenses;

[0035] B. Preparation of polymeric materials for hard contact lenses; pretreatment with polysiloxane material as the main material and other monomers or compounds, including mixing, prepolymerization or grafting;

[0036] C. Molding of hard contact lenses: use a mold with designed product parameters for hard contact lenses, and perform polymerization under photocuring or thermal curing conditions to form the required lenses;

[0037] D. Subsequent processing: a combination of one or more steps in mold opening, cleaning, testing, packaging, and disinfection.

[0038] The mold material in the step A is PP plastic, the metal mold is processed first, and the plastic mold is produced by injection molding.

[0039] In the step B, the siloxa...

Embodiment 3

[0045] A method for making a rigid contact lens, comprising the steps of:

[0046] A. Mold design and processing: design the lens parameters required for rigid contact lenses, and use precision lathes to process the molds required for lenses;

[0047] B. Preparation of polymeric materials for hard contact lenses; pretreatment with polysiloxane material as the main material and other monomers or compounds, including mixing, prepolymerization or grafting;

[0048] C. Molding of hard contact lenses: use a mold with designed product parameters for hard contact lenses, and perform polymerization under photocuring or thermal curing conditions to form the required lenses;

[0049] D. Subsequent processing: a combination of one or more steps in mold opening, cleaning, testing, packaging, and disinfection.

[0050] The mold material in the step A is PBT plastic, the metal mold is processed first, and the mold is made by injection molding.

[0051] In the step B, the siloxane high oxy...

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PUM

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Abstract

The invention provides a production method of a hard cornea contact lens. The production method comprises the following steps: pre-designing a lens mold, reacting with other polymeric monomers by utilizing a siloxane high-oxygen-transmission material to directly prepare a lens under a light curing or thermal curing processing condition, and molding in one step by virtue of the mold. By adopting the production method, the production capacity of the product can be greatly increased, and the problems of the traditional turning process that the processing period is long, the production capacity islow, and the repetition is poor can be solved.

Description

technical field [0001] The invention relates to the manufacture of contact lenses, and belongs to the technical field of polymer materials, in particular, it relates to a method for manufacturing hard contact lenses. Background technique [0002] Contact lenses, also known as contact lenses, are lenses that are worn directly on the human eyeball and are mainly used to correct vision. The earliest developed lens material is polymethyl methacrylate, which is a rigid contact lens. Due to its hard material, it is easy to wear the cornea, has poor wettability, and low oxygen permeability. It is easy to cause eye discomfort when worn. , has been basically eliminated. [0003] In order to solve the problem of oxygen supply, scientists have devoted themselves to developing an oxygen-permeable material that can directly transmit oxygen in the air to the eyeball. Silicone rubber materials have gradually been applied to contact lenses. [0004] The current hard contact lens is proces...

Claims

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Application Information

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IPC IPC(8): G02C7/04
CPCG02C7/04B29D11/00038B29D11/00125B29D11/0048B29C33/3842B29K2083/00B29K2105/24B29C33/40
Inventor 陈平姜勇
Owner HAICHANG CONTACT LENSES
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