Patents Assigned to Iolab Corporation
  • Patent number: 6045577
    Abstract: An ophthalmic lens having a one-piece lens body with an integral edge surface includes grooves in an edge surface for reflecting away from the retina of the patient visible light striking the edge surface. This lens design reduces glare seen by the patient caused when incident light contacts the edge surface and is undesirably reflected onto the retina.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: April 4, 2000
    Assignee: Iolab Corporation
    Inventors: George Joseph Woffinden, Michael Lee Fledderjohann
  • Patent number: 5895610
    Abstract: The polymethyl methacrylate (PMMA) or copolymer thereof used to produce one-piece intraocular lenses is modified by a compression molding process to produce a much tougher material with improved mechanical properties. The process takes material in rod form and compresses into lens blanks. The molded lens blanks receive little or no compression strain in the center 4 mm optic zone. The compression is limited to the periphery region outside the center 4 mm zone. The intraocular lens fabricated from the molded lens blank exhibits greatly increased haptic mechanical properties and resistance to breakage.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: April 20, 1999
    Assignee: Iolab Corporation
    Inventors: Shiao H. Chang, Charles H. Sherwood, Bruce A. Tunberg, Paul D. Rice, Walker L. Gordy
  • Patent number: 5795328
    Abstract: A vacuum system and a method of operating a vacuum system. The system comprises a vacuum line, a pump, a pump motor, a pressure adjusting assembly, a pressure sensor and a control means. The pump is connected to the vacuum line for drawing fluids therefrom, and the motor is connected to the pump to drive the pump. The pressure adjusting assembly is connected to the vacuum line for conducting fluid into that line at an adjustable rate. The pressure sensor is connected to the vacuum line to generate a pressure signal representing the pressure in the vacuum line. The control means receives the pressure signal and generates a system control signal that is used to adjust the pressure in the vacuum line. The specific manner in which the pressure in the vacuum line is adjusted depends on the value of that pressure, and in particular, whether that pressure is in a first range or a second range.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: August 18, 1998
    Assignee: Iolab Corporation
    Inventors: James C. Barnitz, Joseph M. Curley, David C. Downey
  • Patent number: 5755786
    Abstract: An ophthalmic lens and a method of making is disclosed. The lens has a one-piece lens body with an integral edge surface. The edge surface includes means displayed on the edge surface for reflecting visible light which contacts the edge surface away from the retina of the patient which is comprised of beveled portions or a curve of a convex form. The bevels or convex form are displayed on the edge by milling with a milling cutter having a shape matching that desired on the edge. This lens design reduces glare seen by the patient caused when incident light contacts the edge surface and is undesirably reflected onto the retina.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: May 26, 1998
    Assignee: Iolab Corporation
    Inventors: George J. Woffinden, Michael Lee Fledderjohann
  • Patent number: 5693093
    Abstract: An ophthalmic lens having a one piece lens body with an integral edge surface includes grooves in the edge surface for reflecting away from the retina of the patient visible light striking the edge surface. This lens design reduces glare seen by the patient caused when incident light contacts the edge surface and is undesirably reflected onto the retina.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: December 2, 1997
    Assignee: Iolab Corporation
    Inventors: George Joseph Woffinden, Michael Lee Fledderjohann
  • Patent number: 5674284
    Abstract: The polymethyl methacrylate (PMMA) or copolymer thereof used to produce one-piece intraocular lenses is modified by a compression molding process to produce a much tougher material with improved mechanical properties. The process takes material in rod form and compresses into lens blanks. The molded lens blanks receive little or no compression strain in the center 4 mm optic zone. The compression is limited to the periphery region outside the center 4 mm zone. The intraocular lens fabricated from the molded lens blank exhibits greatly increased haptic mechanical properties and resistance to breakage.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: October 7, 1997
    Assignee: Iolab Corporation
    Inventors: Shiao H. Chang, Charles H. Sherwood, Bruce A. Tunberg, Paul D. Rice, Walker L. Gordy
  • Patent number: 5624394
    Abstract: A vacuum system and a method of operating a vacuum system. The system comprises a vacuum line, a pump, a pump motor, a pressure adjusting assembly, a pressure sensor and a control device. The pump is connected to the vacuum line for drawing fluids therefrom, and the motor is connected to the pump to drive the pump. The pressure adjusting assembly is connected to the vacuum line for conducting fluid into that line at an adjustable rate. The pressure sensor is connected to the vacuum line to generate a pressure signal representing the pressure in the vacuum line. The control device receives the pressure signal and generates a system control signal that is used to adjust the pressure in the vacuum line. The specific manner in which the pressure in the vacuum line is adjusted depends on the value of that pressure, and in particular, whether that pressure is in a first range or a second range.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: April 29, 1997
    Assignee: Iolab Corporation
    Inventors: James C. Barnitz, Joseph M. Curley, David C. Downey
  • Patent number: 5582778
    Abstract: An improved intraocular lens has at least one filamentary haptic composed of a continuous matrix material interspersed with a toughening amount of discrete particles of a multistage, sequentially produced elastomeric polymer. An improved process for preparing a single-piece intraocular lens involves preparing a composite lens blank by molding pellets composed of a continuous polymeric material interspersed with particles of a multistage, sequentially produced elastomeric polymer about a central optic lens core so as to produce a single lens blank having a toughened annular region surrounding the central optic region, and then machining at least one filamentary haptic from the toughened annular region to prepare the lens.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: December 10, 1996
    Assignee: Iolab Corporation
    Inventors: Charles H. Sherwood, Shiao H. Chang
  • Patent number: 5554894
    Abstract: A footswitch for ophthalmic surgery includes a rotatable foot pedal, a spring member which biases the foot pedal to resist rotation and an adjustment mechanism for adjusting the bias of the spring member to a surgeon selected value. In an illustrated embodiment, the adjustment mechanism includes a worm screw gear assembly which is used to vary the amount of torque generated by a coil spring on a shaft upon which a pedal is mounted. As a worm gear is rotated by a thumb wheel, a spur gear is rotated to wind or unwind coil spring thereby increasing or decreasing the amount of tension exerted by coil spring on a shaft.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: September 10, 1996
    Assignee: Iolab Corporation
    Inventor: Perry Sepielli
  • Patent number: 5326546
    Abstract: A method and apparatus for the generation, use, and disposal of chlorine dioxide is disclosed. A solid sodium chlorite composition having impurities, at least one of which is sodium hydroxide, is contacted with an agent to consume essentially all of the sodium hydroxide. Chlorine dioxide gas is then generated by contacting the resultant composition with chlorine in a humidified inert carrier gas. The resultant chlorine dioxide gas mixture may then be treated to remove chlorine gas present therein by contacting the same with soda-lime in particulate form. After using the chlorine dioxide gas mixture in the desired manner, chlorine dioxide present in the spent effluent gas may be substantially removed via the introduction of the effluent gas into an aqueous solution of sodium thiosulfate having a sufficient amount of an inorganic base to maintain the alkalinity of the solution during consumption of thiosulfate by chlorine dioxide.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: July 5, 1994
    Assignee: Iolab Corporation
    Inventors: Aaron Rosenblatt, David H. Rosenblatt, David Feldman, Joseph E. Knapp, Diane Battisti, Badie Morsi
  • Patent number: 5290781
    Abstract: This invention relates to the use of ketanserinol as an ophthalmic therapeutic agent to reduce intraocular pressure and its method of use for treating glaucoma by systemic administration of ketanserinol, it salts, esters or prodrugs to a patient or more particularly, topically administering ketanserinol and salts thereof to the eye of a patient.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: March 1, 1994
    Assignee: Iolab Corporation
    Inventors: Ramon L. Espino, Donald G. Musson, Orest Olejnik
  • Patent number: 5282853
    Abstract: An improved intraocular lens is disclosed with at least one filamentary haptic composed of a continuous matrix material interspersed with a toughening amount of discrete particles of a multistage, sequentially produced elastomeric polymer. An improved process for preparing a single-piece intraocular lens is also disclosed. The process involves preparing a composite lens blank by molding pellets composed of a continuous polymeric material interspersed with particles of a multistage, sequentially produced elastomeric polymer about a central optic lens core so as to produce a single lens blank having a toughened annular region surrounding the central optic region, and then machining at least one filamentary haptic from the toughened annular region to prepare the lens.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: February 1, 1994
    Assignee: Iolab Corporation
    Inventors: Charles H. Sherwood, Shiao H. Chang
  • Patent number: 5266241
    Abstract: A method of molding a deformable optic for a soft intraocular lens in which the optic has an opening therein for securely receiving a filamentary fixation member is disclosed. The method includes positioning a wire-like insert member in a mold for the optic at a location corresponding to the desired location of the opening, filling the mold about the wire-like insert member with a curable material selected to form the deformable optic, curing the material, and removing the wire-like insert member from the cured, molded optic.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: November 30, 1993
    Assignee: Iolab Corporation
    Inventor: Ramesh V. Parekh
  • Patent number: 5200453
    Abstract: An ophthalmic formulation comprising a salt of sepazonium or a similar imidazolium compound as a preservative is provided.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: April 6, 1993
    Assignee: Iolab Corporation
    Inventor: Herwig J. Janssen
  • Patent number: 5182270
    Abstract: Experiments have been performed which test the stability of thymoxamine in aqueous solution at room temperature and above. It was determined that dimethyl-beta-cyclodextrin slows the hydrolysis degradation of thymoxamine while other beta-cyclodextrin analogs either accelerate the hydrolysis degradation or have no effect on the rate of hydrolysis degradation. Cytological experiments have been performed which show that chemical formulations containing thymoxamine and up to 5% by weight dimethyl-beta-cyclodextrin have the same toxicity as chemical formulations with thymoxamine alone.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: January 26, 1993
    Assignee: Iolab Corporation
    Inventors: Donald G. Musson, Orest Olejnik
  • Patent number: 5178636
    Abstract: Vision correcting lenses utilizing the principles of both Fresnel lenses and Fresnel zone plates are disclosed. The lenses of the present invention provide multifocal vision correction, and are most preferably used to provide intraocular lenses for small incision surgeries. Using the concept of a "tuned" Fresnel lens, intraocular and other types of vision correcting lenses are provided by the present invention which overcome the limitations found in typical Fresnel lenses by phase synchronizing the light passing through the lens. As disclosed, the groove width and depth of the lens may be varied to provide the synchronization, and also to provide multifocal vision. Also, the design of the present invention permits a relatively thin lens to be designed, therefore making it particularly applicable to small incision surgeries since it may be rolled or folded into a configuration which is easily inserted into an incision in the eye.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: January 12, 1993
    Assignee: Iolab Corporation
    Inventor: Donn M. Silberman
  • Patent number: 5141507
    Abstract: A soft intraocular lens with an insert which can be molded into an optic having an optic attachment member embedded in the optic and a haptic attachment member extending out of the optic to which a haptic may be connected. The insert permits the easy attachment of the haptic to the optic without subjecting the haptic material to the rigors of the processes by which the soft optic is made.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: August 25, 1992
    Assignee: Iolab Corporation
    Inventor: Ramesh V. Parekh
  • Patent number: 5110580
    Abstract: A method and apparatus for the generation, use, and disposal of chlorine dioxide is disclosed. A solid sodium chlorite composition having impurities, at least one of which is sodium hydroxide, is contacted with an agent to consume essentially all of the sodium hydroxide. Chlorine dioxide gas is then generated by contacting the resultant composition with chlorine in a humidified inert carrier gas. The resultant chlorine dioxide gas mixture may then be treated to remove chlorine gas present therein by contacting the same with sodalime in particulate form. After using the chlorine dioxide gas mixture in the desired manner, chlorine dioxide present in the spent effluent gas may be substantially removed via the introduction of the effluent gas into an aqueous solution of sodium thiosulfate having a sufficient amount of an inorganic base to maintain the alkalinity of the solution during consumption of thiosulfate by chlorine dioxide.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: May 5, 1992
    Assignee: Iolab Corporation
    Inventors: Aaron Rosenblatt, David H. Rosenblatt, David Feldman, Joseph E. Knapp, Diane Battisti, Badie Morsi
  • Patent number: 5096285
    Abstract: Multifocal lenses for improving vision are disclosed. The lenses of the present invention use at least one diffractive zone located in a defined portion of the surface of a refractive lens to achieve highly efficient multifocal vision by providing nearly 100% efficiency in the +1 diffractive order. The lenses disclosed may be used for both contact lenses and intraocular lens as well as other vision correcting applications.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: March 17, 1992
    Assignee: Iolab Corporation
    Inventor: Donn M. Silberman
  • Patent number: 5089180
    Abstract: Composite acrylic polymer rods having clear central regions and colored peripheral regions are prepared by polymerizing a flowable solution comprising acrylic monomer, dye and, dissolved therein, acrylic polymer, around a rod of acrylic polymer. Alternatively, a rod of acrylic polymer surrounded by a flowable mixture comprising partially polymerized acrylic monomer and dye is subjected to polymerization conditions to polymerize the flowable mixture.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: February 18, 1992
    Assignee: Iolab Corporation
    Inventors: Gary B. Dunks, Akira Yamada, Oh-Seung Kwon, Andrea Borgelt