7 results about "Contact lens material" patented technology

The present invention provides a hard contact lens that has high oxygen permeability and a large bending deformation capacity, making it resistant to breakage from bending deformation, and a hard contact lens material that can be used to manufacture such a hard contact lens. [Solution] According to one aspect of the present invention, a hard contact lens material is provided, comprising a substituted methacrylate (A) having a molecular structure in which the ratio of the number of fluorine atoms to the number of carbon atoms is 0.6 or more and 0.9 or less, a substituted styrene (B), a methacryloyl group-containing silicone monomer (C), a (meth)acryloyl group-containing monomer (D), an unsaturated double bond-containing hydrophilic monomer (E), and a methacryloyl group-containing monomer (F), wherein the molar ratio of (meth)acryloyl group-containing monomer (D) to methacryloyl group-containing monomer (F) is 0.12 or more and 0.2 or less.

The invention belongs to the technical field of contact lens materials, and discloses a high-moisture-retention contact lens material and a preparation method thereof. The raw materials of the invention comprise 50-70 parts of a silicon-based monomer, 40-60 parts of a hydrophilic monomer, 5-15 parts of hyaluronic acid, 3-10 parts of water-soluble collagen, 2-8 parts of modified chitosan, 1-5 parts of a moisturizing aid, 0.5-3 parts of a cross-linking agent, 0.1-1 part of a photoinitiator and 10-20 parts of water. The contact lens material prepared by the invention is low in water loss rate, long in moisturizing time, excellent in biocompatibility, excellent in oxygen permeability, simple in preparation process and easy to industrialize.

The application discloses a kind of hydrophilic rigid gas-permeable contact lens materials and its surface grafting modified preparation method, comprising the following steps: using the monomer containing isocyanate group or epoxy group and the copolymerization of silane monomer and methyl methacrylate to prepare rigid contact lens;The above-mentioned rigid contact lens is immersed into the solution containing hydrophilic macromolecule of hydroxyl or amino, and the covalent reaction of epoxy group and amino or isocyanate group and hydroxyl or amino is carried out at high temperature, and the hydrophilic macromolecule is grafted on the surface of lens;The present application is simple and easy to operate, and the product after grafting is stable, which can significantly improve the hydrophilicity of the lens without affecting the transparency of the lens.

This invention belongs to the field of contact lens materials technology, specifically relating to 3D-printed hydrogel materials, their preparation methods, and their application in the fabrication of smart contact lenses. The 3D-printed hydrogel material comprises the following raw material components: hydroxyethyl methacrylate, polyethylene glycol diacrylate, 3-(trimethoxysilyl)propyl methacrylate, Pluronic F-127, poly(3,4-ethylenedioxythiophene):poly(p-phenylene sulfonate), and a photoinitiator. The 3D-printed hydrogel material provided by this invention can be directly molded into a contact lens substrate through high-precision 3D printing, thus providing a core material basis for developing next-generation comfortable, precise, and mass-producible personalized smart intraocular pressure monitoring contact lenses. This invention also provides its preparation method. Applying the hydrogel material of this invention to 3D-printed contact lenses meets the requirements for mechanical performance and comfort in contact lenses.

The invention belongs to the technical field of contact lens materials, and particularly relates to a 3D printing hydrogel material, a preparation method thereof and application of the 3D printing hydrogel material in preparation of intelligent contact lenses. The 3D printing hydrogel material is prepared from the following raw material components: hydroxyethyl methylacrylate, polyethylene glycol diacrylate, methacrylic acid-3-(trimethoxysilyl) propyl ester, PluronicF-127, poly (3, 4-ethylenedioxythiophene), poly (p-styrene sulfonate) and a photoinitiator. According to the 3D printing hydrogel material provided by the invention, the material can be directly formed into a contact lens matrix through high-precision 3D printing, so that a core material basis is provided for developing a next-generation comfortable and precise intelligent intraocular pressure monitoring contact lens which can be manufactured in a large-scale personalized manner, and the invention further provides a preparation method of the 3D printing hydrogel material. The hydrogel material disclosed by the invention is applied to 3D printed contact lenses, and the requirements of comfortable mechanical properties and the like of the contact lenses are met.

Disclosed in the present invention are an ophthalmic material and a method for preparing contact lenses from same, relating to the field of materials of contact lenses. Specifically disclosed is an ophthalmic material, comprising the following components in percentage by mass: 0.01-0.5% of methyldopa, 99.1-99.5% of an acrylate compound and 0.2-0.8% of a cross-linking agent. The present invention has the advantages of improving properties and the comfort of wearing of contact lenses and improving eye health.

This invention discloses a method for preparing a photothermal controlled-release hydrogel contact lens material. The method involves chemically bonding ganciclovir with hydroxypropyltrimethylammonium chloride chitosan, then adding methacrylic anhydride to introduce double bonds. The resulting product is used as a crosslinking agent to crosslink and copolymerize with hydroxyethyl methacrylate (MXene) nanosheets to prepare the hydrogel material. The prepared photothermal controlled-release hydrogel contact lens material can bond drugs to the polymer chains of the hydrogel contact lens for drug loading, avoiding drug loss due to tear rinsing, thereby improving drug storage stability. Furthermore, it can be modulated with near-infrared light to generate a photothermal effect, raising the hydrogel temperature and triggering the breakage of thermosensitive azo bonds, releasing the drug into the contact lens matrix. When the lens is worn, the drug can be slowly released from the contact lens into the eye, potentially making it a multifunctional contact lens material for treating eye diseases.