Matches 301 - 350 out of 472 < 1 2 3 4 5 6 7 8 9 10 >
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4774093 Polysaccharide compositions, preparation and uses  
Novel beta-1,3-glucan polysaccharide gels characterized by (a) coherent, uniform, non-particulate structure, and (b) substantially uniform pH throughout. The gels are prepared by dissolving a...
4761069 Contact lens and method of molding  
A soft contact lens made of a hydrated polymer with an overall water content in the range of 40% to 90% by weight has a water content at the front surface of the lens which is at least 3 percentage...
4761436 Contact lens comprising triorganovinylsilane polymers  
A contact lens comprising a lens substrate in shape of a lens which comprises a triorganovinylsilane based polymer, said lens substrate having a hydrophilic polymeric chain grafted onto the surface...
4746691 Method of pigmenting water-absorbable plastics  
A colored opacified plastic material containing an organic binder, at least one pigment, a hydrophilic polymerizable plastic material and a cross linking agent is disclosed together with a method...
4744647 Semi-opaque corneal contact lens or intraoccular lens and method of formation  
A selected pattern of disruptions in the lens material of a soft or hard corneal contact lens or intraoccular lens is provided which substantially disrupts the undistorted transmisability of an...
4745158 Highly water-absorptive optical material  
A highly water-absorptive optical material obtained by saponification for hydrophilic treatment of a copolymer composed essentially of: (A) from 2 to 30 parts by weight of a (meth)acrylate...
4743106 Highly oxygen permeable contact lens materials and compositions thereof  
Highly oxygen permeable hard and semi-hard contact lenses are made from the copolymer of ethylenically unsaturated siloxanylalkoxy ester monomer, ethylenically unsaturated flurocarbon ester monomer...
4738520 Eye color change contact lens  
The invention is a cosmetic contact lens that changes the apparent color of the eye. The cosmetic lens is made from a cosmetic contact lens blank comprising a colored transparent polymer disk...
4737558 Siloxane copolymers for ophthalmic applications  
A copolymer for preparation of optical lenses obtained from siloxane monomers having aromatic ring and vinyl functionality.
4728182 Bi-focal contact lens  
A bi-focal contact lens having a first lens portion for distance viewing, a second lens portion for near viewing and capable of being shifted, on the eyeball, between a first position in which the...
4720187 Polyvinyl alcohol derivatives containing pendant (meth)acryloyl units bound through urethane groups and crosslinked hydrogel contact lenses made therefrom  
Organic aprotic solvent soluble polymers which are derivatives of a polyvinyl alcohol, having a weight average molecular weight of at least about 2,000, and containing from about 0.5 to about 90...
4720188 Process for manufacturing colored contact lenses and lenses made by the process  
A process for manufacturing colored contact lenses and the lens manufactured by the process. A transparent contact lens having a central pupil section and a surrounding iris section has a colorant...
4713244 Sustained-release formulation containing an amino acid polymer with a lower alkyl (C.sub.1 -C.sub.4) polar solvent  
A sustained-release polymeric hydrogel dosage form useful for topical, systemic or transdermal administration of a medicinal agent comprising a cross-linked, polymerized hydrophilic polymer, an...
4709996 Fluid lens  
A device for forming a fluid lens when immersed in a liquid medium. The device includes a semipermeable transparent sheath defining a fully enclosed cavity and having a plurality of pores for...
4702573 Variable powered contact lens  
A soft contact lens of soft opthalmic plastic material with an anterior portion resiliently deformable by movement of the eye. The lens is of the scleral-corneal type, and has a base-down prism...
4693939 Article coated with copolymer of poly(vinyl alcohol)  
Novel, non-crosslinked copolymers of vinyl trifluoroacetate (VTA) and up to 5 weight percent of the VTA of certain comonomers, such as vinyl esters, vinyl ethers, or disubstituted ethylene...
4668446 Process for making soft contact and intraocular lenses with an esterifiable carboxyl-containing polymer  
A process of making soft lenses from an esterifiable, partially cross-linked carboxyl-containing polymer, and a method of attaching a haptic to a swellable intraocular lens. The soft contact lenses...
4666249 Surface-treated contact lens and method of producing  
A contact lens for correction of astigmatism is formed from a single polymeric or copolymeric material. The lens has a central optical zone of greater rigidity than a surrounding non-optical zone....
4661573 Lens composition articles and method of manufacture  
New copolymer composition, methods for processing the copolymers into optical devices and articles resulting therefrom, especially intraocular and contact lenses having outstanding extended wear...
4652099 Scleral ring  
A scleral ring of hydrophilic material 0.05 to 0.35 millimeters thick is provided with a circular shape about 16 to 25 millimeters in diameter, or a generally elliptical shape approximately 24 to...
4650843 Soft contact lens  
When trifluoroethyl methacrylate, hexafluoroisopropyl methacrylate, pentafluoro-n-propyl methacrylate and/or pentafluoro-n-butyl methacrylate which are fluorine-containing monomers, are added to a...
4649184 Oxygen permeable soft contact lens material  
An oxygen permeable soft contact lens material having an improved oxygen permeability, improved softness and transparency prepared by copolymerizing a mixture comprising (a) a polyorganoxiloxane...
4638025 Method of pigmenting water-absorbable plastic and products therefrom  
A colored opacified plastic material containing an organic binder, at least one pigment, a hydrophilic polymerizable plastic material and a cross linking agent is disclosed together with a method...
4633003 Siloxane monomers for ophthalmic applications  
Novel colorless siloxane monomers containing both an aromatic ring and vinyl functionality are employed as a monomer for preparing copolymers that are ophthalmically useful. The monomer has good...
4632844 Optical product having a thin film on the surface  
An optical product having a thin film on the surface which is obtained by subjecting a mixed gas of oxygen and a hydrocarbon compound having a double bond to plasma polymerization in the presence...
4632968 Contact lens and process for preparation thereof  
An oxygen-permeable contact lens consisting essentially of a polymer having an organic polysiloxane skeleton and a three-dimensional crosslinked structure, and a process for the preparation...
4619793 Method of producing annealed polyvinyl alcohol contact lens  
Optically clear soft contact lenses of aqueous swollen solid polyvinyl alcohol having a weight average molecular weight of at least 6,000, having been annealed under crystallinity promoting...
4618227 Soft contact lens  
A soft contact lens, particularly a multifocal or toric lens having prism ballast for lens orientation, is provided with a channel in the back surface of the lens circumscribing the optical zone of...
4616910 Visual indicator on soft contact lenses  
A soft contact lens is provided with a visual indicator to show that it is not inside out prior to application to the eye. The indicator is such that when viewed from the outside surface of the...
4615593 Fluorescent non-optical corneal color change device  
A non-optical cosmetic device for changing the apparent color of the eye. The colored cosmetic device has a central visual aperture and surrounds the pupil of the eye. Fluorescent pigments are...
4611039 Wettable, gas permeable contact lens  
Wettable, oxygen and carbon dioxide permeable, optically clear contact lenses are made of a composition comprising styrene or a substituted styrene compound, an ethylenically polyunsaturated...
4605712 Unsaturated polysiloxanes and polymers thereof  
Polysiloxanes of uniform molecular weight (MW) distribution with 500-10,000 MW segments of polysiloxane and containing at least one vinyl group connected to said polysiloxane segments through...
4580882 Continuously variable contact lens  
A continuously variable multi-focal soft contact lens wherein a continuous optical gradient in a region smaller than the maximum pupil opening is provided. The concave surface is aspheric with a...
4573778 Aqueous fluorophotometer  
Fluorescence of the anterior chamber of an eye is determined by projecting a ribbon of light from the side of the eye through the anterior chamber in a direction generally perpendicular to the...
4573774 Soft toric contact lens  
A soft toric contact lens having spherocylindrical power for correcting astigmatism in humans and utilizing a prism ballast as a means of maintaining correct axial orientation. The degree of prism...
4571039 Eye-medicating contact-lens construction  
The invention contemplates eye-medicating contact-lens constructions wherein a small central optical component is retained by surrounding fenestrated haptic structure which is the vehicle for eye...
4569858 Surface modification of hydrophilic contact lenses  
The present invention relates to a method of modifying a surface of a soft contact lens to make the lens resistant to soiling. The method comprises initiating a reaction between the unhydrated lens...
4558931 Colored soft contact lens  
A cosmetic contact lens is lathe cut from a body of stacked discs fused together. The discs are made from hydrophilic polymer, some of which are colored (pigmented or dyed). The pupillary area is...
4559186 Production of borate crosslinked polyvinyl alcohol contact lenses  
Soft contact lenses of polyvinyl alcohol having a weight average molecular weight of at least about 6,000, crosslinked with borate in an effective amount, to increase the elastic modulus thereof,...
4549794 Hydrophilic bifocal contact lens  
Hydrophilic bifocal corneal contact lenses of the alternating-vision type having a critical set of dimensions for the various elements which results in a surprising increase in the success rate of...
4547543 Water-absorptive contact lenses  
A water-absorptive contact lens made of a copolymer consisting essentially of: (a) from about 50 to about 95 parts, by weight of the total monomer units, of hydrophilic monomer units consisting...
4543398 Ophthalmic devices fabricated from urethane acrylates of polysiloxane alcohols  
Shaped articles, particularly ophthalmic devices, can be fabricated from oxygen transmissive, hydrolytically stable, polysiloxane copolymers of readily prepared poly(organosiloxane) monomers having...
4540761 Oxygen-permeable hard contact lens  
The oxygen-permeable hard contact lens of this invention produced by polymerizing in a composition composed of 30 to 50% by weight of an alkyl (meth)acrylate, 10 to 40% by weight of a...
4537943 Correction of defects in the eye and compositions therefor  
A composition for forming in vivo a lens in an eye comprises silicone polymer and is curable at body temperature to form an optically clear lens which remains so in the presence of physiological...
4536554 Hydrophilic polymers and contact lenses made therefrom  
An interpenetrating network polymer is obtained by mixing hydrophilic monomer vinyl pyrrolidone and hydrophobic monomer (5-alkylene-m-dioxanyl) acrylic ester in the presence of at least two...
4532267 Vision correction lens made from an aminopolysaccharide compound or an ether or ester thereof  
An oxygen permeable, wettable, optically acceptable vision correction lens can be made from homopolymers of aminoglycans, substituted aminoglycans, or crosslinked polymers thereof.
4529747 Soft contact lenses  
A soft contact lens made of a copolymer composed essentially of: (a) from about 30 to about 60 parts by weight of at least one monomer selected from the group consisting of long chain alkyl...
4528311 Ultraviolet absorbing polymers comprising 2-hydroxy-5-acrylyloxyphenyl-2H-benzotriazoles  
Ultraviolet light absorbing polymer compositions comprising copolymers of 2-Hydroxy-5-acrylyloxyphenyl-2H-benzotriazoles with one or more other monomers copolymerizable therewith, particularly...
4525044 Soft contact lens with surface identification and method of using same  
A soft contact lens of generally symmetrical concavo-convex configuration and of uniform optical power about its optic axis is provided with an elongated marking in the peripheral portion thereof...
4525563 Oxygen permeable soft contact lens composition  
A copolymer comprising, (a) a hydrophilic siloxanylalkyl ester having a structure in which a siloxane part (1) having a terminal acryloyl or methacryloyl group and a siloxane part (2) having a...
Matches 301 - 350 out of 472 < 1 2 3 4 5 6 7 8 9 10 >