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4433125 |
Oxygen permeable hard contact lens
An oxygen permeable hard contact lens having an improved oxygen permeability and an improved fragility as well as excellent hardness and rigidity, made of a copolymer comprising an organosilane or...
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4429956 |
Wet cornea telescope
A wet cornea telescope permits a viewer to see a magnified image of a remotely positioned object. The telescope includes a fluid-filled eyepiece which is positioned in contact with the cornea of...
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4430458 |
Hydrogel-forming polymeric materials
Polymeric materials suitable for bio-medical applications, particularly in making contact lenses, are formed by copolymerization and crosslinking of: (1) an amide of an unsaturated carboxylic acid...
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4423930 |
Polymeric contact lens materials with high oxygen permeability
A series of alpha-olefin sulfur dioxide copolymers derived from the C 4 to C 18 alpha-olefins which may be readily processed to an optical article, such as a contact lens, having oxygen and...
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4423195 |
Ocular membrane and method for preparation thereof
A composition which is hydrophobic but possesses excellent wettability comprising copolymers and terpolymers of a polysiloxane and esters of acrylic and methacrylic acids. These compositions are...
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4419505 |
Contact lens composition, article and method of manufacture
A copolymer composition, specially adapted for use in fabricating a contact lens comprises a copolymer of comonomers which include about 1-95 parts by weight of hydroxy silane esters of acrylic or...
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4416814 |
Protein polymer hydrogels
Protein hydrogel structures formed from natural proteins having an average molecular weight of about 100,000 or less by dissolving the protein in an aqueous acidic solution, subjecting the protein...
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4413104 |
Process for preparing organopolysiloxanes and copolymers thereof
A process for preparing organopolysiloxanes having SiC-bonded organofunctional groups, which comprises reacting an organopolysiloxane containing SiC-bonded hydroxyl and/or alkoxy groups and having...
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RE31406 |
Oxygen permeable contact lens composition, methods and article of manufacture
Contact lenses are fabricated from a copolymer of a polysiloxanylalkyl acrylic ester and an alkyl acrylic ester. The copolymer has increased oxygen permeability.
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4405773 |
Hydrophylic contact lenses and methods for making same
Hydrophilic contact lenses produced by polymerizing (a) hydroxyalkyl monoesters of acrylic or methacrylic acid, (b) monomers having the formula ##STR1## where R, is hydrogen or methyl, R 2 ...
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4402579 |
Contact-lens construction
The invention contemplates integral lens-and-haptic structure and a technique of making the same, using sheet material as the only ingredient of the ultimate product, which may be an intraocular...
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4401371 |
Hydrogel oxygen generator with improved fluid flow
A contact lens concave-convex in form made of a transparent, optically clear hydrogel polymer containing micro-photoelectrolysis elements to produce hydrogen and oxygen by the electrolysis of water...
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4388436 |
Permeable contact lens
A hydrophilic soft contact lens is made from a cross-linked copolymer of an N,N-(C 1 -C 2 alkyl)acrylamide and cyclohexyl methacrylate. The lens has much higher oxygen permeability and better...
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4386831 |
Device for the measurement of electrical potentials of the eye
A corneal lens (1) is provided with a measurement electrode (4), a portion of which being flush with the concave surface of the lens or protruding from said surface, in such a manner to be in...
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4384097 |
Contact lenses of methyl methacrylate copolymers
Contact lenses and contact shells of light-refracting material consisting essentially of a copolymer of (I) from 40 to 90% by weight of methyl methacrylate and (II) from 10 to 60% by weight...
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4377329 |
Contact lens or the like
The invention contemplates improved extraocular-lens structures for contact with the cornea of a human eye, to be worn in place of spectacles. The construction features a lens element of requisite...
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4369229 |
Composite hydrogel-forming article and method of making same
Polymer blends capable of forming hydrogels upon immersion in water are bonded by heat and pressure alone to water-resistant polymer compositions compatible with vinyl lactam polymers to form...
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4355135 |
Tintable abrasion resistant coatings
What is disclosed are hard, abrasion resistant, tintable/dyeable coating compositions which are based on siloxane/silica hybrid coating resins. These materials are especially useful on transparent...
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4346482 |
Living contact lens
A contact lens (14) for insertion into the cornea (20) of a patient is provided. The contact lens (14) includes a circular portion of a donor cornea (10) anteriorly curved for correction of the...
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T102101 |
Soft contact lenses resistant to opacification in use
A hydrophilic polymer shaped article adapted for use as a soft contact lens is treated to provide at least on the surfaces thereof a modified, less hydrophilic polymeric structure inhibiting...
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4341889 |
Polysiloxane composition and biomedical devices
Monomeric polysiloxanes endcapped with activated unsaturated groups are copolymerized with a modulus modifier and tear film stabilizers to form hard, gas permeable, polysiloxane contact lenses and...
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4327202 |
Styrene copolymer for contact lenses
A novel contact lens having improved gas permeability is disclosed which is formed from copolymerizing a mixture comprising: (a) a group 1 monomer which is a styrene or substituted styrene...
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4327203 |
Polysiloxane with cycloalkyl modifier composition and biomedical devices
Monomeric polysiloxanes endcapped with activated unsaturated groups are copolymerized with cycloalkyl modulus modifiers and tear film stabilizers to form hard, gas permeable, polysiloxane contact...
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4318595 |
Contact lens and method of making the same
A contact lens, particularly a high minus power anterior surface toric lens, is made having a toric central optical portion without prism and an annular outer portion having prism but without toric...
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4312725 |
Contact lenses of high gas permeability and method
This invention relates to contact lenses having an oxygen gas permeability constant of at least ##EQU1## comprising homopolymers and interpolymers formed by the polymerization of monomers...
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4303772 |
Oxygen permeable hard and semi-hard contact lens compositions methods and articles of manufacture
The invention relates to new monomers of a polysiloxanyl alkyl esters of acrylic and methacrylic acids and its copolymerization with alkyl esters of acrylic, methacrylic acids and/or itaconate...
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4297008 |
Method and apparatus for making a non spherical beveled contact lens
An improved contact lens with a truly non-spherical bevel is disclosed, along with a method and apparatus for making same. Lenses, including the theoretically perfect "ski" periphery are...
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4280759 |
Permeable wettable contact lens
The permeability of a silane copolymer is increased and the surface wetting properties improved if the silane is polymerized before being mixed with the comononer and before the copolymerization.
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4279795 |
Hydrophilic-hydrophobic graft copolymers for self-reinforcing hydrogels
Materials for forming a hydrogel when contacted with water having improved anti-thrombogenic properties and a highly improved mechanical strength are obtained by the copolymerization of a free...
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4276402 |
Polysiloxane/acrylic acid/polcyclic esters of methacrylic acid polymer contact lens
Monomeric polysiloxanes end-capped with activated unsaturated groups polymerized with acrylic acid and a comonomer comprising a polycyclic ester of acrylic acid or methacrylic acid to form a...
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4264493 |
Natural protein polymer hydrogels
Natural protein hydrogel structures formed from natural proteins having molecular weights not exceeding 100,000 by dissolving the protein in an aqueous acidic solution, crosslinking the protein,...
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4260725 |
Hydrophilic contact lens made from polysiloxanes which are thermally bonded to polymerizable groups and which contain hydrophilic sidechains
A water absorbing, soft, hydrophilic, flexible, hydrolytically stable, biologically inert contact lens with the capability of transporting oxygen sufficiently to meet the requirements of the human...
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4254248 |
Contact lens made from polymers of polysiloxane and polycyclic esters of acrylic acid or methacrylic acid
Monomeric polysiloxanes end-capped with activated unsaturated groups polymerized with a comonomer comprising a polycyclic ester of acrylic acid or methacrylic acid to form a soft contact lens is...
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4245069 |
Polysiloxane composition
A composition which is hydrophobic but possesses excellent wettability comprising copolymers and terpolymers of a polysiloxane and esters of acrylic and methacrylic acids. These compositions are...
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4243790 |
Styrene/hydroxy alkyl acrylic acid ester copolymer for contact lenses
A novel contact lens having improved gas permeability is disclosed which is formed from copolymerizing a mixture comprising: (a) a group 1 monomer which is a styrene or substituted styrene...
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4235985 |
Polymer for contact lens and contact lens made thereof
A polymerization product suitable for contact lenses comprising (a) an organosiloxane monomer having the following general formula ##STR1## wherein n is an integer of 1 to 3, X is --(CH 2 ) p --O]...
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4231905 |
Polymethylmethacrylate cellulosic copolymer lens material
A gas permeable dimensionally stable contact lens material which is a transparent, optically clear methylmethacrylate cellulosic copolymer.
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4217038 |
Glass coated polysiloxane contact lens
A glass coated, flexible, hydrophilic polymeric contact lens having a sufficient amount of oxygen transportability to meet the requirements of the human cornea is disclosed. In addition, this glass...
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4212226 |
Device and method of illuminating a target by the eye-motion of an operator
A contact lens adapted to fit over the eye of an operator can be employed to focus light impinging on the lens from a light source and reflected therefrom, substantially onto a predetermined region...
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4211476 |
Contact lenses with angular orientation and stabilization
A contact lens is constructed with an anterior surface which is radially unsymmetrical and a posterior surface which is composed of multiple curves. The lens is designed to properly adhere and...
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4208364 |
Process for the production of contact lenses
There is provided a mold comprising a male and a female mold member fabricated from thermoplastic polymeric materials which, in very thin sections are flexible under polymerization conditions, but,...
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4198131 |
Silicone resin optical devices
Optical devices such as corneal, scleral and interocular lenses are made from phenyl-containing siloxane resins. They combine a high degree of oxygen transmission with ease of fabrication inherent...
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4198132 |
Contact lens
A contact lens of a preselected mass has an optical zone and at least one peripheral zone. The optical zone has a shape and thickness sufficient to result in a desired optical correction. At least...
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4195919 |
Contact lens with reduced spherical aberration for aphakic eyes
Contact lenses, particularly for aphakic eyes, are characterized by a rear conicoid optical surface that is fitted to the cornea and a front prolate ellipsoidal optical surface of particular power,...
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4194814 |
Transparent opthalmic lens having engraved surface indicia
Indicia are formed in the surface of an ophthalmic contact lens by sublimating lens material with a high intensity beam of radiation. A beam of light from a laser is directed through one or more...
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4194815 |
Semi-scleral contact lens
The inner surface of a semi-scleral contact lens is shaped relative to the topography of an individual eyeball to achieve central contact and edge contact with tearfilm clearance therebetween. The...
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4193672 |
Contact lens with improved interior surface
A contact lens has an improved interior surface which includes an optical zone and peripheral zone. The optical zone has a radius of curvature similar to that of the cornea of the eye to be fitted....
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4193897 |
Contact lenses formed of mixtures of cellulose esters and ethylene/vinyl acetate copolymers
Contact lenses and scleral lenses formed of mixtures consisting essentially of (1) from 99 to 70% by weight of a cellulose ester of one or more aliphatic carboxylic acids, and (2) from 1 to...
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4179757 |
Biocompatible articles having high permeability to gases derived from polysulfones
There is disclosed the preparation of an alpha-olefin-sulfur dioxide copolymer derived from the C 8 to C 18 alpha-olefins. The polymers undergo clean thermal degradation, having high...
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4171878 |
Combined contact lens
The combined contact lens is characterized in that it comprises a zone of a hydrophilic material, an aperture in the center of said zone, and a solid body from an optically transparent material...
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