Patents by Inventor Ritu Shrestha

Ritu Shrestha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220142770
    Abstract: Embodiments of a modulable absorption light adjustable lens (MALAL) comprise a light adjustable lens that is capable of changing its optical properties upon an adjusting irradiation, including a photo-modifiable material; and a modulable absorption front protection layer, including a modulable absorption compound whose absorption properties can be modulated with a modulating stimulus. Other embodiments include a method of adjusting an optical property of a modulable absorption light adjustable lens, the method comprising: reducing an absorption of a modulable absorption compound of a modulable absorption front protection layer of the MALAL by a modulating stimulus, the MALAL having been previously implanted into an eye; and changing an optical property of a light adjustable lens of the MALAL by applying an adjusting irradiation.
    Type: Application
    Filed: January 25, 2022
    Publication date: May 12, 2022
    Inventors: Ilya Goldshleger, John Kondis, Ritu Shrestha
  • Patent number: 11266495
    Abstract: Embodiments of a modulable absorption light adjustable lens (MALAL) comprise a light adjustable lens that is capable of changing its optical properties upon an adjusting irradiation, including a photo-modifiable material; and a modulable absorption front protection layer, including a modulable absorption compound whose absorption properties can be modulated with a modulating stimulus. Other embodiments include a method of adjusting an optical property of a modulable absorption light adjustable lens, the method comprising: reducing an absorption of a modulable absorption compound of a modulable absorption front protection layer of the MALAL by a modulating stimulus, the MALAL having been previously implanted into an eye; and changing an optical property of a light adjustable lens of the MALAL by applying an adjusting irradiation.
    Type: Grant
    Filed: October 20, 2019
    Date of Patent: March 8, 2022
    Assignee: RxSight, Inc.
    Inventors: Ilya Goldshleger, John Kondis, Ritu Shrestha
  • Publication number: 20210322152
    Abstract: A composite light adjustable intraocular lens can include an acrylic intraocular insert; a silicone-based light adjustable lens, attached to the acrylic intraocular insert with an adhesion promoter; and haptics; wherein the adhesion promoter includes a first orthogonal functional group, configured to bond with an acrylic component of the acrylic intraocular insert; and a second orthogonal functional group, configured to bond with a silicone component of the silicone-based light adjustable lens.
    Type: Application
    Filed: April 15, 2020
    Publication date: October 21, 2021
    Applicant: RxSight, Inc.
    Inventors: Ritu Shrestha, Ilya Goldshleger, John Kondis, Ronald M. Kurtz
  • Publication number: 20210251744
    Abstract: A composite light adjustable intraocular lens comprises an acrylic diffractive intraocular lens, having a diffractive structure and haptics; and a silicone light adjustable lens, attached to the acrylic diffractive intraocular lens. The diffractive structure produces constructive interference in at least four consecutive diffractive orders corresponding a range of vision between near and distance vision, wherein the constructive interference produces a near focal point, a distance focal point corresponding to the base power of the ophthalmic lens, and an intermediate focal point between the near focal point and the distance focal point and wherein a diffraction efficiency of at least one of the diffractive orders is suppressed to less than ten percent.
    Type: Application
    Filed: February 21, 2021
    Publication date: August 19, 2021
    Applicant: RxSight, Inc.
    Inventors: Ilya Goldshleger, John Kondis, Ronald M. Kurtz, Ritu Shrestha
  • Publication number: 20210113328
    Abstract: Embodiments of a modulable absorption light adjustable lens (MALAL) comprise a light adjustable lens that is capable of changing its optical properties upon an adjusting irradiation, including a photo-modifiable material; and a modulable absorption front protection layer, including a modulable absorption compound whose absorption properties can be modulated with a modulating stimulus. Other embodiments include a method of adjusting an optical property of a modulable absorption light adjustable lens, the method comprising: reducing an absorption of a modulable absorption compound of a modulable absorption front protection layer of the MALAL by a modulating stimulus, the MALAL having been previously implanted into an eye; and changing an optical property of a light adjustable lens of the MALAL by applying an adjusting irradiation.
    Type: Application
    Filed: October 20, 2019
    Publication date: April 22, 2021
    Applicant: RxSight, Inc.
    Inventors: Ilya Goldshleger, John Kondis, Ritu Shrestha
  • Patent number: 10966819
    Abstract: A composite light adjustable intraocular lens, can include an intraocular lens (IOL), a light adjustable lens, attached to the intraocular lens, and haptics. In some cases, a composite light adjustable intraocular lens can include an intraocular lens, and haptics, attached to the IOL with light-adjustable hinges. A method of adjusting an implanted composite light adjustable intraocular lens can include planning a targeted optical outcome of an implantation of the composite light adjustable intraocular lens into an eye; implanting, the composite light adjustable intraocular lens into the eye; performing a diagnostic measurement to evaluate an implanted optical outcome of the implantation; determining a correction based on a comparison of the planned optical outcome and the implanted optical outcome; and applying a stimulus to adjust an optical characteristic of the composite light adjustable intraocular lens to induce the determined correction.
    Type: Grant
    Filed: May 29, 2017
    Date of Patent: April 6, 2021
    Assignee: RxSight, Inc.
    Inventors: Ilya Goldshleger, John Kondis, Ronald M. Kurtz, Ritu Shrestha, Gergely T. Zimanyi
  • Patent number: 10449740
    Abstract: The present invention generally relates to a method for producing silicone hydrogel contact lenses having a stable lubricious coating thereon without involving use of organic solvent in post-curing processes.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: October 22, 2019
    Assignee: Novartis AG
    Inventors: Xinming Qian, Jared Nelson, Robert Carey Tucker, Steve Yun Zhang, Daqing Wu, Leroy Wainaina Muya, Dharmesh Patel, Zach Munoz, Yongxing Qiu, Chung-Yuan Chiang, Ritu Shrestha, Kelly Kayi Tallau
  • Patent number: 10364365
    Abstract: The present invention provides an actinically or thermally curable ink for making colored silicone hydrogel contact lenses. The ink of the invention comprises at least a pigment, a polymeric dispersant, a solvent and an actinically or thermally curable silicone-containing binder polymer including ethylenically unsaturated groups and segments derived from at least one silicone-containing vinylic monomer or macromere. The ink of the invention is characterized by having capability to be cured actinically or thermally to form a colored coat on a silicone hydrogel contact lens, wherein the ink is characterized by having an longer print life using a pad-printing system by at least 30% comparing to the ink which has the same composition except of no polymeric dispersant, wherein ink life is a number of printed parts that can be achieved in a print cycle.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: July 30, 2019
    Assignee: Novartis AG
    Inventors: Richard Charles Breitkopf, Ellen A. Day, Yongxing Qiu, Ritu Shrestha
  • Publication number: 20180338827
    Abstract: A composite light adjustable intraocular lens, can include an intraocular lens (IOL), a light adjustable lens, attached to the intraocular lens, and haptics. In some cases, a composite light adjustable intraocular lens can include an intraocular lens, and haptics, attached to the IOL with light-adjustable hinges. A method of adjusting an implanted composite light adjustable intraocular lens can include planning a targeted optical outcome of an implantation of the composite light adjustable intraocular lens into an eye; implanting, the composite light adjustable intraocular lens into the eye; performing a diagnostic measurement to evaluate an implanted optical outcome of the implantation; determining a correction based on a comparison of the planned optical outcome and the implanted optical outcome; and applying a stimulus to adjust an optical characteristic of the composite light adjustable intraocular lens to induce the determined correction.
    Type: Application
    Filed: May 29, 2017
    Publication date: November 29, 2018
    Applicant: RxSight, Inc.
    Inventors: Ilya Goldshleger, John Kondis, Ronald M. Kurtz, Ritu Shrestha, Gergely T. Zimanyi
  • Publication number: 20170183520
    Abstract: The present invention provides an actinically or thermally curable ink for making colored silicone hydrogel contact lenses. The ink of the invention comprises at least a pigment, a polymeric dispersant, a solvent and an actinically or thermally curable silicone-containing binder polymer including ethylenically unsaturated groups and segments derived from at least one silicone-containing vinylic monomer or macromere. The ink of the invention is characterized by having capability to be cured actinically or thermally to form a colored coat on a silicone hydrogel contact lens, wherein the ink is characterized by having an longer print life using a pad-printing system by at least 30% comparing to the ink which has the same composition except of no polymeric dispersant, wherein ink life is a number of printed parts that can be achieved in a print cycle.
    Type: Application
    Filed: November 10, 2016
    Publication date: June 29, 2017
    Inventors: Richard Charles Breitkopf, Ellen A. Day, Yongxing Qiu, Ritu Shrestha
  • Publication number: 20170165932
    Abstract: The present invention generally relates to a method for producing silicone hydrogel contact lenses having a stable lubricious coating thereon without involving use of organic solvent in post-curing processes.
    Type: Application
    Filed: December 13, 2016
    Publication date: June 15, 2017
    Inventors: Xinming Qian, Jared Nelson, Robert Carey Tucker, Steve Yun Zhang, Daqing Wu, Leroy Wainaina Muya, Dharmesh Patel, Zach Munoz, Yongxing Qiu, Chung-Yuan Chiang, Ritu Shrestha, Kelly Kayi Tallau
  • Patent number: 9389336
    Abstract: Provided herein is a polymerized product formed of a polymerized monomer mixture comprising intentionally added water and at least one hydrophilic monomer wherein the monomer mix does not contain any silicon containing materials. The polymerized monomer mixture of the invention herein is useful in many biomaterial applications. Especially preferred is the use of the biomaterial as a hydrogel contact lens.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: July 12, 2016
    Assignee: Bausch & Lomb Incorporated
    Inventors: Ritu Shrestha, Alok K. Awasthi, Lynn F. Atwater, Jay Friedrich Kunzler, Richard Fanqing Meng
  • Publication number: 20140034519
    Abstract: Provided herein is a polymerized product formed of a polymerized monomer mixture comprising intentionally added water and at least one hydrophilic monomer wherein the monomer mix does not contain any silicon containing materials. The polymerized monomer mixture of the invention herein is useful in many biomaterial applications. Especially preferred is the use of the biomaterial as a hydrogel contact lens.
    Type: Application
    Filed: August 2, 2013
    Publication date: February 6, 2014
    Applicant: Bausch & Lomb Incorporated
    Inventors: Ritu Shrestha, Alok K. Awasthi, Lynn F. Atwater, Jay Friedrich Kunzler, Richard Fanqing Meng