Patents Assigned to Barnes-Hind, Inc.
-
Patent number: 5786883Abstract: An annular mask contact lens designed to operate with the normal functioning of the human pupil. An annular mask forms a small pinhole-like aperture on the contact lens enabling continual focus correction. The outer diameter of the annular mask allows the wearer to transmit more light energy through the pupil as brightness levels decrease. The contact lens may be structured with two separate and distinct optical corrections, both at the small aperture region and in the region beyond the annular mask. Functional imaging is thus achieved for both bright and dim lighting, and over a wide range of viewing distances. Cosmetic and peripheral vision enhancement is also provided by the contact lens constructed according to the invention.Type: GrantFiled: September 13, 1993Date of Patent: July 28, 1998Assignee: Pilkington Barnes Hind, Inc.Inventors: David Miller, Leroy Meshel
-
Patent number: 5771088Abstract: A contact lens is disclosed which has a first optical zone (2) adapted to compensate for spherical aberration and at least one additional zone (3) which is configured to provide improved peripheral vision. Generally, the first optical zone is shaped to provide an aspheric surface and the additional zone or zones is shaped to provide a refractive power not greater than the first zone, the difference in the refractive powers of the zones being no more than about 0.75 diopter.Type: GrantFiled: September 27, 1995Date of Patent: June 23, 1998Assignee: Pilkington Barnes Hind, Inc.Inventor: Colin M. Perrott
-
Patent number: 5757458Abstract: An annular mask contact lens designed to operate with the normal functioning of the human pupil. An annular mask forms a small pinhole-like aperture on the contact lens enabling continual focus correction. The outer diameter of the annular mask allows the wearer to transmit more light energy through the pupil as brightness levels decrease. The contact lens may be structured with two separate and distinct optical corrections, both at the small aperture region and in the region beyond the annular mask. Functional imaging is thus achieved for both bright and dim lighting, and over a wide range of viewing distances. Cosmetic and peripheral vision enhancement is also provided by the contact lens constructed according to the invention.Type: GrantFiled: September 30, 1996Date of Patent: May 26, 1998Assignee: Pilkington Barnes Hind, Inc.Inventors: David Miller, Leroy Meshel
-
Patent number: 5748282Abstract: A multifocal contact lens has diffractive power arising from a series of concentric zones each providing an asymmetric retardation of light across the zone width to direct light predominantly into a required order and sign of diffraction. At least some of the concentric zones are shaped so that the step height varies so that it is different in one region (A) of the lens from that in another region (B), whereby the intensity of light associated with an image observed by diffraction at one order in that region (A) of the lens is greater than the light intensity associated with the same image when observed at the same order through another region (B) of the lens.Type: GrantFiled: October 5, 1995Date of Patent: May 5, 1998Assignee: Pilkington Barnes Hind, Inc.Inventor: Michael H. Freeman
-
Patent number: 5713460Abstract: Disclosed are methods for extracting leachable materials from a hydratable polymer by incorporation of an adsorbent into the solution employed to effect extraction. Suitable adsorbents are characterized as having a higher affinity for the leachable materials than either the hydratable polymer or the solvent employed in the solution. Also disclosed are sealed packages comprising an aqueous solution, an adsorbent and a hydratable polymer in the form of an ophthalmic device.Type: GrantFiled: February 26, 1996Date of Patent: February 3, 1998Assignee: Pilkington Barnes Hind, Inc.Inventors: John M. Evans, William E. Meyers, Joseph Weinschenk
-
Patent number: 5629360Abstract: Disclosed are optically clear xerogel polymer compositions containing an interpenetrant.Type: GrantFiled: September 22, 1995Date of Patent: May 13, 1997Assignee: Pilkington Barnes Hind, Inc.Inventors: Syed H. Askari, Hermann H. Neidlinger
-
Patent number: 5534038Abstract: Disclosed are processes for tinting hydrogel materials, such as contact lenses, by dissolving a leuco sulfate ester of a vat dye in an compatible monomer solution, adding an oxidizing initiator to the monomer solution, and oxidizing and polymerizing the monomer solution and dye in the same solution. In one aspect, the oxidation and polymerization are conducted simultaneously whereas in another embodiment, the oxidation of the soluble leuco sulfate ester of a vat dye to the insoluble vat dye and polymerization are conducted sequentially in the same reaction medium.Type: GrantFiled: May 19, 1995Date of Patent: July 9, 1996Assignee: Pilkington Barnes Hind, Inc.Inventor: John M. Evans
-
Patent number: 5519069Abstract: An interpenetrating network copolymer, method of producing same, and method of producing optical lens blanks and finished lenses therefrom. The method broadly involves the preparation of first and second mixtures of polymerizable vinyl monomers and interrupting the polymerization of the first mixture at a relative viscosity of from about 1.05 to about 10 by admixing the partially polymerized first mixture with the second mixture to create a casting solution and thereafter, when desired, polymerizing molded casting solution in heat to create a solid lens material.Type: GrantFiled: June 6, 1995Date of Patent: May 21, 1996Assignee: Pilkington Barnes Hind, Inc.Inventors: William J. Burke, Lisa A. Folk, Donald J. Ratkowski
-
Patent number: 5505884Abstract: An interpenetrating network copolymer, method of producing same, and method of producing optical lens blanks and finished lenses therefrom. The method broadly involves the preparation of first and second mixtures of polymerizable vinyl monomers and interrupting the polymerization of the first mixture at a relative viscosity of from about 1.05 to about 10 by admixing the partially polymerized first mixture with the second mixture to create a casting solution and thereafter, when desired, polymerizing molded casting solution in heat to create a solid lens material.Type: GrantFiled: May 15, 1995Date of Patent: April 9, 1996Assignee: Pilkington Barnes Hind Inc.Inventors: William J. Burke, Lisa A. Folk, Donald J. Ratkowski
-
Patent number: 5498681Abstract: Disclosed is a polymeric article at least a portion of which is manufactured from a hydrogel material having a hydration level of from between about 45% and 56% by weight, which hydrogel is formed from a xerogel which is a copolymer system that can be solvolyzed and hydrated and during which undergoes a linear expansion of from about -7% to about +7%. The polymeric article is comprised of a copolymer system comprising dichloroacetate ester of glyceryl acrylate, methacrylate and ethacrylate and one or more compatible ethylenically unsaturated monomers without such solvolyzable groups.Type: GrantFiled: February 21, 1995Date of Patent: March 12, 1996Assignee: Pilkington Barnes Hind, Inc.Inventors: Syed H. Askari, Hermann H. Neidlinger, Khushroo Gandhi
-
Patent number: 5494155Abstract: Disclosed are methods for extracting leachable materials from a hydratable polymer by incorporation of an adsorbent into the solution employed to effect extraction. Suitable adsorbents are characterized as having a higher affinity for the leachable materials than either the hydratable polymer or the solvent employed in the solution. Also disclosed are sealed packages comprising an aqueous solution, an adsorbent and a hydratable polymer in the form of an ophthalmic device.Type: GrantFiled: June 29, 1994Date of Patent: February 27, 1996Assignee: Pilkington Barnes Hind, Inc.Inventors: John M. Evans, William E. Meyers, Joseph Weinschenk
-
Patent number: 5482981Abstract: Disclosed are optically clear xerogel polymer compositions containing an interpenetrant.Type: GrantFiled: November 9, 1994Date of Patent: January 9, 1996Assignee: Pilkington Barnes Hind, Inc.Inventors: Syed H. Askari, Hermann H. Neidlinger
-
Patent number: 5433898Abstract: Methods of manufacturing a contact lens form a mold which has a first section formed from a first material and a second section formed from a second material. The methods permit the facile preparation of contact lenses having two or more differing materials, for example, a composite lens, a bifocal lens, a trifocal lens and the like.Type: GrantFiled: September 11, 1992Date of Patent: July 18, 1995Assignee: Pilkington Barnes Hind, Inc.Inventors: Ashok R. Thakrar, Khushroo Gandhi
-
Patent number: 4861840Abstract: Disclosed are a novel monomer, and oxygen-permeable copolymers made therefrom, as well as contact lenses made from said copolymers, wherein the novel monomer has the formula: ##STR1##Type: GrantFiled: December 3, 1986Date of Patent: August 29, 1989Assignee: Barnes-Hind, Inc.Inventors: Drahoslav Lim, Chidambar L. Kulkarni
-
Patent number: 4826001Abstract: A contact lens case is provided which includes a cannister open at its upper end for receiving lens washing fluid and a cap adapted to be secured to and seal the cannister. The cap includes a securing ring adapted to engage the cannister so as to secure the cap to the cannister. The cap further includes a lens retaining portion having at least two lens receptacles pivotably mounted on a shoulder. A leaf spring is provided in the shoulder for urging the lens receptacles apart. A turning knob is provided on the cap and is connected to a planetary gear mechanism for causing the lens retaining portion to rotate in the cannister as the turning knob is rotated.Type: GrantFiled: April 11, 1988Date of Patent: May 2, 1989Assignee: Barnes-Hind, Inc.Inventor: Bradley E. Castillo
-
Patent number: 4687485Abstract: An intraocular lens of the type having a plurality of legs which center the lens in the anterior or posterior chamber by tangential contact between eye tissue and a region on each leg, wherein the region is composed of a compressible material. Also disclosed are homogeneous lenses in which the legs are colored.Type: GrantFiled: August 23, 1985Date of Patent: August 18, 1987Assignee: Barnes-Hind, Inc.Inventors: Drahoslav Lim, Stephen Jacoby, Richard Homick, Frank Powers
-
Patent number: 4590301Abstract: Compounds of the general formula ##STR1## wherein n, R.sub.1, R.sub.2 and X are defined herein, are effective inhibitors of polymerization of vinylic monomers, particularly acrylic monomers. The inhibitors are easily, efficiently, and thoroughly removed from solution with the monomer by contact with charcoal.Type: GrantFiled: October 24, 1984Date of Patent: May 20, 1986Assignee: Barnes-Hind, Inc.Inventors: Drahoslav Lim, Peter C. Morris
-
Patent number: 4569858Abstract: 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 surface containing carboxylic acid or alcohol moieties and agents capable of reacting with carboxylic acid or alcohol moieties in order to produce a surface which then either has a hydrophobic coating, a nonionic hydrophilic coating or is charged.Type: GrantFiled: January 28, 1985Date of Patent: February 11, 1986Assignee: Barnes-Hind, Inc.Inventors: Drahoslav Lim, Peter C. Morris
-
Patent number: 4568517Abstract: A contact lens is disinfected in an aqueous H.sub.2 O.sub.2 solution. The H.sub.2 O.sub.2 solution is neutralized and transformed in situ into a buffered, saline storage solution by adding a neutralizer such as sodium sulfite or sodium thiosulfate, and optional buffering agents. The neutralizer has a coating which dissolves to release the ingredients only a period of time after it is added, so that it can be put into the H.sub.2 O.sub.2 solution at the same time that the lens is.Type: GrantFiled: November 21, 1984Date of Patent: February 4, 1986Assignee: Barnes-Hind, Inc.Inventors: Hans H. Kaspar, Murray J. Sibley, Gordon H. Yung
-
Patent number: 4565198Abstract: A method for altering the radius of curvature of the cornea which includes the steps of making incisions into the cornea and affixing a rigid gas permeable contact lens, having predetermined radius of curvature, to the eye to have the cornea conform to the shape of the lens.Type: GrantFiled: December 27, 1983Date of Patent: January 21, 1986Assignee: Barnes-Hind, Inc.Inventor: Erich A. Koeniger