Patents by Inventor Krishnakumar Venkateswaran
Krishnakumar Venkateswaran 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).
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Publication number: 20250037825Abstract: A method and system for managing treatment of an ophthalmic patient is provided. In one method, optical information is collected from a patient. A deep learning model hosted on an ophthalmic treatment platform is trained using training data including historical ophthalmic procedure data associated with a plurality of patients, complication data associated with the plurality of patients, and patient survey data regarding treatment satisfaction of the plurality of patients. The platform is configured to generate recommendations and/or predictions at varying stages of treatment. At least at a first stage of treatment, the platform is configured to generate a treatment recommendation regarding an ophthalmological treatment, the treatment recommendation including an ophthalmic lens type recommendation and a probability of a predetermined surgical outcome associated with the ophthalmic lens type recommendation.Type: ApplicationFiled: July 25, 2024Publication date: January 30, 2025Applicant: Oculotix, Inc.Inventor: KRISHNAKUMAR VENKATESWARAN
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Publication number: 20230017040Abstract: An intraocular lens includes a base refractive structure having anterior and posterior surfaces that are shaped for producing a first optical power and a diffractive structure formed in one of the surfaces of the base refractive structure including overlapping first and second diffractive patterns over a common aperture for producing second and third optical powers. The second optical power is an uneven division of the third optical power. The first and second diffractive patterns have respective step heights that are separately varied as a function of radial distance from the optical axis over the common aperture.Type: ApplicationFiled: May 25, 2022Publication date: January 19, 2023Inventors: Nivedan Tiwari, Krishnakumar Venkateswaran, Andrew William Jones, Chun Zhan, Lorenzo Salvatori
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Patent number: 11344404Abstract: An intraocular lens includes a base refractive structure having anterior and posterior surfaces that are shaped for producing a first optical power and a diffractive structure formed in one of the surfaces of the base refractive structure including overlapping first and second diffractive patterns over a common aperture for producing second and third optical powers. The second optical power is an uneven division of the third optical power. The first and second diffractive patterns have respective step heights that are separately varied as a function of radial distance from the optical axis over the common aperture.Type: GrantFiled: December 26, 2018Date of Patent: May 31, 2022Assignee: Bausch & Lomb IncorporatedInventors: Nivedan Tiwari, Krishnakumar Venkateswaran, Andrew William Jones, Chun Zhan, Lorenzo Salvatori
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Patent number: 10531950Abstract: An intraocular lens, comprising an optic having an anterior surface and a posterior surface, providing a refractive base power, at least one of the anterior surface and the posterior surface having disposed thereon a profile comprising steps having heights determined by combining three constituent diffractive profiles. The diffractive profiles correspond to powers p1, p2 and p3, the powers being different than one another and each power being a positive power less than about 1D or about 1.25D. Each of the diffractive profiles having step heights causing a phase delay, relative to aqueous fluid, of 0.6 to 1.2 times 2? for 546 nm light. The combined profile defined by the function: z=max (diffractive profile (p1), diffractive profile (p2), diffractive profile (p3)), where p3>p2>p1.Type: GrantFiled: October 6, 2017Date of Patent: January 14, 2020Assignee: Tatvum LLCInventors: Nivedan Tiwari, Krishnakumar Venkateswaran
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Publication number: 20190254810Abstract: An intraocular lens includes a base refractive structure having anterior and posterior surfaces that are shaped for producing a first optical power and a diffractive structure formed in one of the surfaces of the base refractive structure including overlapping first and second diffractive patterns over a common aperture for producing second and third optical powers. The second optical power is an uneven division of the third optical power. The first and second diffractive patterns have respective step heights that are separately varied as a function of radial distance from the optical axis over the common aperture.Type: ApplicationFiled: December 26, 2018Publication date: August 22, 2019Inventors: Nivedan Tiwari, Krishnakumar Venkateswaran, Andrew William Jones, Chun Zhan, Lorenzo Salvatori
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Publication number: 20180132996Abstract: An intraocular lens, comprising an optic having an anterior surface and a posterior surface, providing a refractive base power, at least one of the anterior surface and the posterior surface having disposed thereon a profile comprising steps having heights determined by combining three constituent diffractive profiles. The diffractive profiles correspond to powers p1, p2 and p3, the powers being different than one another and each power being a positive power less than about 1D or about 1.25D. Each of the diffractive profiles having step heights causing a phase delay, relative to aqueous fluid, of 0.6 to 1.2 times 2? for 546 nm light. The combined profile defined by the function: z=max (diffractive profile (p1), diffractive profile (p2), diffractive profile (p3)), where p3>p2>p1.Type: ApplicationFiled: October 6, 2017Publication date: May 17, 2018Applicant: Tatvum LLCInventors: Nivedan Tiwari, Krishnakumar Venkateswaran
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Patent number: 9078745Abstract: An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.Type: GrantFiled: March 11, 2014Date of Patent: July 14, 2015Assignee: NOVARTIS AGInventors: Xiaoxiao Zhang, Costin Eugene Curatu, Krishnakumar Venkateswaran, Daniel Robert Carson, Mutlu Karakelle, Xin Hong, Yueai Liu
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Publication number: 20140194986Abstract: An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.Type: ApplicationFiled: March 11, 2014Publication date: July 10, 2014Applicant: NOVARTIS AGInventors: XIAOXIAO ZHANG, COSTIN EUGENE CURATU, KRISHNAKUMAR VENKATESWARAN, DANIEL ROBERT CARSON, MUTLU KARAKELLE, XIN HONG, YUEAI LIU
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Patent number: 8709079Abstract: An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.Type: GrantFiled: May 14, 2010Date of Patent: April 29, 2014Assignee: Novartis AGInventors: Xiaoxiao Zhang, Costin Eugene Curatu, Krishnakumar Venkateswaran, Daniel Robert Carson, Mutlu Karakelle, Xin Hong, Yueai Liu
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Publication number: 20100312337Abstract: An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.Type: ApplicationFiled: May 14, 2010Publication date: December 9, 2010Inventors: Xiaoxiao Zhang, Costin Eugene Curatu, Krishnakumar Venkateswaran, Daniel Robert Carson, Mutlu Karakelle, Xin Hong, Yueai Liu
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Publication number: 20100131060Abstract: The present invention generally provides multifocal ophthalmic lenses, e.g., multifocal intraocular lenses, that employ a central refractive region for providing a refractive focusing power and a diffractive region for providing diffractive focusing powers. The refractive focusing power provided by the lens's central region corresponds to a far-focusing power that is substantially equal to one of the diffractive focusing powers while the other diffractive power corresponds to a near-focusing power. The far-focusing power can be enhanced by changes to the phase of the central refractive region and/or changes to the curvature of the central refractive region.Type: ApplicationFiled: November 19, 2009Publication date: May 27, 2010Inventors: Michael J. Simpson, Krishnakumar Venkateswaran