Lens Or Filter Selectively Insertable In Optical Path Patents (Class 351/233)
  • Patent number: 10561313
    Abstract: A refraction device includes a main body, a spherical power lens coupled to the main body, an astigmatic power lens movably coupled to the main body, and a visual display coupled to the main body and oriented toward an optical pathway extending through the spherical power lens and the astigmatic power lens. The visual display is configured to display an image for testing visual acuity.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: February 18, 2020
    Assignee: ACCUVISIONDESIGNS LLC
    Inventors: Richard James Mackool, Richard Jonathan Mackool, Brice Kaleski, Robert R. Towle, Evan Rittenhouse Jones, Christopher Dean Smith
  • Patent number: 10448823
    Abstract: A test of visual function and/or functional vision may be performed at varying luminance levels. A first course may be selected for a subject. A given course may comprise a layout having a beginning point, at least one turn, at least one obstacle, and an ending point. The first course may be illuminated with a first luminance level based on an estimated lower light sensitivity cutoff. The subject may be prompted to perform a first run of the test. The test may comprise, from the beginning point to the ending point, navigating the layout of the first course by walking around the at least one turn and avoiding the at least one obstacle. A determination may be made as to whether the subject successfully completed the first course based on one or both of speed or accuracy.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: October 22, 2019
    Assignees: The Children's Hospital of Philadelphia, The Trustees of the University of Pennsylvania
    Inventors: Katherine A. High, Jean Bennett, Daniel Chung, Albert Maguire, Jennifer Wellman, Sarah McCague, Gregory Podsakoff
  • Patent number: 9980638
    Abstract: Systems and methods for providing identification factors for an individual wearer. Some or all of the identification factors when within a predetermined value provide a prescription and corrective ophthalmic lenses for a selected individual wearer, the corrective ophthalmic lens having at least one correction that is to the nearest 0.20 diopter, or is in a range between about the nearest 0.01 diopter and about the nearest 0.20 diopter. The prescription and corrective ophthalmic lenses are obtained by at least first analysis performed with a first instrument, a second analysis performed with a second instrument, and a third analysis performed with a third instrument, in which each instrument is different, and each analysis is different.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: May 29, 2018
    Assignee: ESSILOR INTERNATIONAL (Compagnie Generale d'Optique)
    Inventors: Gabriel Keita, Howard Purcell
  • Patent number: 9980639
    Abstract: A visual compensation system (10) enabling observation, with variable optical power correction, along an optical observation axis (X) includes:—a first rotatable optical element (2) centered on the optical axis (X) and having a first cylinder power along the optical axis (X); —a second rotatable optical element (4) centered on the optical axis (X) and having a second cylinder power along the optical axis (X); and—a lens (6) having the optical axis (X) as the axis thereof, and moreover having variable sphere power.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: May 29, 2018
    Assignee: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
    Inventors: Michel Nauche, Stephane Boutinon
  • Patent number: 9055895
    Abstract: An ophthalmologic photographing apparatus includes a light source configured to emit photographing light for illuminating a subject's eye through an illumination optical system, a changing unit configured to change a light emission amount of the light source, a selecting unit configured to select at least one of a plurality of photographing modes for photographing the subject's eye, a storage unit configured to store the changed light emission amount by the changing unit as a changed value during the photography in the photographing mode selected by the selecting unit, and a setting unit configured to set a light emission amount at a start of the photography to a light emission amount which is set beforehand as an initial state of the light source or to the changed value according to the plurality of photographing modes.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: June 16, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Motoya Takai, Manabu Wada
  • Publication number: 20150009474
    Abstract: One exemplary embodiment is a method for determining an ophthalmic prescription. An examination room is lighted to simulate daytime viewing and a conventional eye chart is used as a visual stimulus. A first corrective spherical lens power is determined by varying spherical lens power and identifying when perceived vision is best. The examination room is kept dark to simulate nighttime viewing conditions. The visual stimulus utilized is a white point source on a dark background, or a self illuminated symbol on a dark background. A second corrective spherical lens powered is determined by varying spherical lens power and identifying when perceived vision is best. An ophthalmic prescription such as one or more lenses, one or more surgical corrections or a combinations thereof is provided including a first corrective component including the first preferred spherical lens power, and a second corrective component including the second preferred spherical lens power.
    Type: Application
    Filed: August 19, 2014
    Publication date: January 8, 2015
    Inventors: Larry N. Thibos, Jose Manuel Gonzalez-Meijome, Norberto Lopez-Gil
  • Patent number: 8926094
    Abstract: An adaptor adapts an SLR camera for use as an ophthalmic viewing and imaging device. The adaptor is mounted to the camera between the camera body and the camera lens, and includes optical components arranged to direct illumination of the interior of the eye. The adaptor includes a first light source configured to provide a maximum level of illumination that is sufficient to identify structures of interest within an interior of an eye. The adaptor directs light from a second, external source to provide a level of illumination sufficient to obtain a fundus image. Optical components within the adaptor define a first optical pathway for directing light from the first light source to the lens, a second optical pathway for directing light from the second light source to the camera lens, and a third optical pathway for directing light from the camera lens through the adaptor to the camera.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: January 6, 2015
    Assignee: Tufts University
    Inventor: Christopher Pirie
  • Patent number: 8882273
    Abstract: A method for determining a lens prescription for the eye. The method includes selecting a first ultraviolet (UV) trial lens and a second UV trial lens and determining whether the first UV trial lens or the second UV trial lens results in greater improvement in visual function. The second UV trial lens may be selected for the prescription when the second UV trial lens results in greater improvement in visual function as compared to the first UV trial lens. The method includes selecting a first color group comprising a first color trial lens and a second color trial lens and determining whether the first color trial lens or the second color trial lens results in greater improvement in visual function. The second color trial lens may be selected for the prescription when the second color trial lens results in greater improvement in visual function than the first color trial lens.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: November 11, 2014
    Inventor: Brad Lee Chase
  • Patent number: 8789951
    Abstract: A vision testing method and apparatus are disclosed, the method including measuring the modulation to a wavefront of light that is imparted by an intra-ocular lens, determining the wavefront modulation necessary to emulate the optical properties of the IOL after it replaces the crystalline lens in a patient's eye, generating a static or dynamic image viewable by a patient, modulating the wavefront of the image remote from the patient to attain the wavefront that necessary to emulate the optical properties of the IOL after it is implanted, and relaying said wavefront to a plane nearby, on, or within the patient's eye.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: July 29, 2014
    Assignee: DigitalVision, LLC
    Inventors: Keith P. Thompson, Jose R. Garcia
  • Publication number: 20130176536
    Abstract: A vision testing method and apparatus are disclosed, the method including measuring the modulation to a wavefront of light that is imparted by an intra-ocular lens, determining the wavefront modulation necessary to emulate the optical properties of the IOL after it replaces the crystalline lens in a patient's eye, generating a static or dynamic image viewable by a patient, modulating the wavefront of the image remote from the patient to attain the wavefront that necessary to emulate the optical properties of the IOL after it is implanted, and relaying said wavefront to a plane nearby, on, or within the patient's eye.
    Type: Application
    Filed: January 10, 2013
    Publication date: July 11, 2013
    Applicant: DigitalVision, LLC
    Inventor: DigitalVision, LLC
  • Patent number: 8434870
    Abstract: A method of simulating an optical effect of an optical lens for a potential wearer, the method comprising: using a first camera to take a first image of a scene through a first optical lens, the first optical lens having optical characteristics according to a first ophthalmic lens design, the first camera being provided with optics arranged to simulate the optical characteristics of a human eye; and displaying the first image on a display device for viewing by the potential wearer enabling the potential wearer to visualise the optical effects of the first optical lens on his viewing ability. The position of the first camera, the first optical lens and the display device are fixed with respect to a referential frame defined by the head of the potential wearer, the head of the potential wearer being movable with respect to the scene.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: May 7, 2013
    Assignee: Essilor International (Compagnie Generale d'Optique)
    Inventor: Thierry Bonnin
  • Patent number: 8292435
    Abstract: An optometric apparatus for a subjective binocular visual performance test includes right and left test units including right and left housings, a plurality of optical elements disposed in the right and left housings, right and left test windows provided to the housings, in which desired optical elements selected from the optical elements are to be placed and through the selected optical elements, an optotype is presented to examinee's right and left eyes by an optotype presenting apparatus, right and left polarization plates having polarization axes perpendicular to each other and arranged to be placed in the test windows, and right and left protective covers arranged to be placed in the test windows at a side facing the optotype presenting apparatus and having polarization optical characteristics of changing circularly polarized light that passes through the right and left protective covers into linearly polarized light having polarization axes perpendicular to each other.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: October 23, 2012
    Assignee: Nidek Co., Ltd.
    Inventor: Yuichiro Kanazawa
  • Publication number: 20120249965
    Abstract: An apparatus for use in determining a neurochromatic lens prescription. The apparatus includes an opening operable for use in a patient observing a visual target and a trial lens slot operable for use in inserting a trial lens into the patient's line of sight and the opening. The apparatus further includes a channel operable for sliding the trial lens into a centered position within the opening and a trial lens retainer operable for holding one or more trial lenses resulting in visual function improvement. The channel is coupled to the trial lens slot and the channel is operable for sliding the trial lens horizontally into the opening. The trial lens retainer is operable to retain the one or more trial lenses within the patient's line of sight.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 4, 2012
    Inventors: Brad Lee Chase, Noble Engle
  • Publication number: 20120249966
    Abstract: A trial lens kit for determining a neurochromatic lens prescription for the eye. The trial lens kit includes a first plurality of trial lenses wherein each of the first plurality of trial lenses is operable to filter a particular wavelength of light. The first plurality of trial lenses corresponds to a first type of visual function improvement. The trial lens kit further comprises a second plurality of trial lenses where each of the second plurality of trial lenses is operable to filter a particular wavelength of light. The second plurality of trial lenses corresponds to a second type of visual function improvement. The first plurality of trial lenses and the second plurality of trial lenses are operable for determining a neurochromatic prescription.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 4, 2012
    Inventor: Brad Lee Chase
  • Publication number: 20120188512
    Abstract: Aspects of the present invention provide systems, methods, and apparatuses for providing coarse vision correction tuning capability, fine vision correction tuning capability, and/or high-order aberration correction capability. An optical device or lens assembly of the present invention can include one or more conventional lenses, one or more fluid or liquid lenses, one or more electro-active lenses, or any combination thereof. The optical device or lens assembly can be mechanically, adhesively, or magnetically coupled to a phoropter or can be built into the phoropter as an integrated add on lens assembly. Electro-active lenses within the lens assembly of the present invention can provide a range of optical powers including—positive, neutral (plano), and negative optical powers—that can be discretely or continuously tuned or adjusted. A wired or wireless remote unit can be used to control the lens assembly of the present invention.
    Type: Application
    Filed: April 16, 2010
    Publication date: July 26, 2012
    Applicant: e-Vision Smart Optics, Inc.
    Inventors: Dwight Duston, Anthony Van Heugten
  • Patent number: 8226238
    Abstract: An article for performing a subjective refraction includes a lens having a mean power that varies across the lens in a first direction and a cylindrical power that varies across the lens in a second direction, orthogonal to the first direction, wherein the mean power varies by four diopters or more and the cylindrical power varies by four diopters or more.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: July 24, 2012
    Assignee: Carl Zeiss Vision Inc.
    Inventor: Ray Steven Spratt
  • Publication number: 20120120369
    Abstract: A refraction device determines a refraction end point to provide corrective optics for a test subject. The device includes an adjustable optical system providing corrective optics to the test subject and an adjustable viewing target disposed along an optical path such as to be viewable through the adjustable optical system by a test subject. The adjustable viewing target includes a directional indicator linked synchronously to at least two choices of corrective optics presented to the test subject.
    Type: Application
    Filed: November 17, 2010
    Publication date: May 17, 2012
    Inventor: Shui T. Lai
  • Publication number: 20120002163
    Abstract: A binocular vision apparatus allows a patient to view objects through the apparatus with polychromatic light and monochromatic aberration correction, such that the chromatic aberration of the eye can be combined with the monochromatic aberration correction, so as to provide a more accurate determination of vision quality. The binocular vision apparatus provides left and right viewing optics that can substantially maintain the line of sight of each eye, such that objects can be viewed in a room with 3D depth perception corresponding to the distance of the object from the patient. As both near and far objects can be viewed with binocular aberration correction, the patient can alternate binocular viewing between near and far vision with chromatic aberration so as to evaluate a proposed treatment such as a presbyopia correction.
    Type: Application
    Filed: July 2, 2010
    Publication date: January 5, 2012
    Applicant: AMO Wavefront Sciences, LLC
    Inventor: Daniel R. Neal
  • Patent number: 8042945
    Abstract: A multifocal intraocular lens simulator includes an optical system enabling an object to be observed therethrough, and a test lens holder which holds a prescribed test intraocular lens. The intraocular lens holder is installed at a position optically conjugate with a position at which an eye of an observer is to be placed. The present invention also teaches a method of simulating a multifocal intraocular lens.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: October 25, 2011
    Assignee: Hoya Corporation
    Inventors: Takashi Iizuka, Moriyasu Kanai
  • Patent number: 7997733
    Abstract: An electro-active spectacle lens is disclosed. The disclosed lens includes a first lens optic. The disclosed lens also includes a first electro-active zone positioned in a cooperative relationship with the first lens optic. In certain embodiments, the electro-active lens includes a range finder positioned in a cooperative relationship with the electro-active lens.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: August 16, 2011
    Assignee: e-Vision, LLC
    Inventors: Ronald D. Blum, Dwight P. Duston, Dan Katzman
  • Publication number: 20110194074
    Abstract: An article for performing a subjective refraction includes a lens having a mean power that varies across the lens in a first direction and a cylindrical power that varies across the lens in a second direction, orthogonal to the first direction, wherein the mean power varies by four diopters or more and the cylindrical power varies by four diopters or more.
    Type: Application
    Filed: February 10, 2010
    Publication date: August 11, 2011
    Applicant: CARL ZEISS VISION INC.
    Inventor: Steven Spratt
  • Publication number: 20110080562
    Abstract: A multifocal intraocular lens simulator includes an optical system enabling an object to be observed therethrough, and a test lens holder which holds a prescribed test intraocular lens. The intraocular lens holder is installed at a position optically conjugate with a position at which an eye of an observer is to be placed. The present invention also teaches a method of simulating a multifocal intraocular lens.
    Type: Application
    Filed: October 4, 2010
    Publication date: April 7, 2011
    Applicant: HOYA CORPORATION
    Inventors: Takashi IIZUKA, Moriyasu KANAI
  • Patent number: 7914148
    Abstract: A method of simulating an optical effect, and/or characteristic of a selected ophthalmic lens design for a wearer is disclosed. In an embodiment, the method includes retrieving simulation data for the selected ophthalmic lens design and processing the simulation data to generate output image data for an output image simulating the optical effect and/or characteristic of the selected ophthalmic lens design. The output image is displayed, using a head-mounted display worn by the wearer, for viewing by the wearer. A system for simulating an optical effect, and/or characteristic of a selected ophthalmic lens design for a wearer is also disclosed.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: March 29, 2011
    Assignee: Carl Zeiss Vision Australia Holdings Limited
    Inventors: Scott Fisher, Warwick Freeland
  • Patent number: 7862175
    Abstract: An optometer for subjectively examining refractive power of an examinee's eye, comprises: a phoropter which selectively disposes an optical element in front of the examinee's eye; a controller having a switch panel for transmitting a signal to the phoropter and a horizontally extending rotation axis; a display rotatable about the rotation axis of the controller, orientation of the display being changeable by its rotation between a side with the switch panel and a side without the switch panel; and a control part which controls a display screen of the display to appear in a constant orientation irrespective of whether the display is reversed upside down by its rotation.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: January 4, 2011
    Assignee: Nidek Co., Ltd.
    Inventors: Noritsugu Nozawa, Hirohisa Terabe
  • Patent number: 7857450
    Abstract: A vision testing device for measuring single or multiple visual functions consisting of an internally illuminated hand-held instrument, vision charts, vision correcting and occluding elements, a testing frame for holding combined vision correcting and blocking elements, and modular accessories.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: December 28, 2010
    Inventor: Albert John Hofeldt
  • Patent number: 7806529
    Abstract: An eye examination apparatus 100 of the present invention comprises, a refractive power measuring section 50 for measuring refractive powers of subject eyes E of a subject in a binocular viewing state, an eye chart presenting section 30 for presenting a subjective measurement eye chart to be observed by the subject, a correcting section 40 for correcting the subject eyes by referring to data on the refractive powers measured with the refractive power measuring section 50 and using the subjective measurement eye chart presented in the eye chart presenting section 30 and an optical characteristics measuring section 10 for subjectively measuring an optical characteristic of the subject eyes E corrected or being corrected with the correcting section 40 in a state where the subject is binocularly viewing the subjective measurement eye chart.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: October 5, 2010
    Assignee: Topcon Corporation
    Inventors: Toshifumi Mihashi, Yoko Hirohara, Mariko Kobayashi
  • Patent number: 7673992
    Abstract: A device and method for determining the defective vision of an optical system include a controllable optical element. The objective and subjective determination of the correction values are more greatly combined in that a measuring and controlling device forms a control loop with the controllable optical element, and the optical characteristics of the controllable element can be changed manually.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: March 9, 2010
    Assignee: Carl Zeiss Meditec AG
    Inventor: Peter Wengler
  • Publication number: 20090262304
    Abstract: A method of making corrective eyeglasses is disclosed. One embodiment is a method of making corrective eyeglasses. The method includes obtaining vision parameters of a patient's eyes, obtaining an eyeglass frame comprising at least one mounted optical element, and programming the optical element to define a pattern of refraction that is associated with the vision parameters.
    Type: Application
    Filed: June 24, 2009
    Publication date: October 22, 2009
    Inventors: Andreas W. DREHER, Jagdish M. Jethmalani, Laurence Warden, Shui T. Lai
  • Publication number: 20090251666
    Abstract: An adaptive optics phoropter is aligned with a Badal optometer and an adjustable aperture component to subjectively determine an optimal vision correction as a power profile for an ophthalmic lens or ablating a cornea. The optimal power profile is preferably determined in an iterative process by adjusting the vergence of the Badal optometer and aperture size of the adjustable aperture component for power profiles with presbyopic power zones having different amplitudes, shapes, widths, and/or de-centering. Also included is a method of recursively computing a refractive surface with a regular presbyopic power zone (e.g., according to the optimal power profile) and adding it onto an underlying irregular Zernike-basis-set aberration-corrected surface in a linear fashion for fabricating an ophthalmic lens.
    Type: Application
    Filed: June 9, 2009
    Publication date: October 8, 2009
    Inventors: Joseph M. Lindacher, Rafael V. Andino, Scott R. Robirds, Teresa DeCenzo-Verbeten
  • Publication number: 20090128777
    Abstract: A liquid lens system comprises a liquid drop 10 whose shape can be influenced by electrical fields. A plurality of electrodes are arranged annularly around the liquid drop. The liquid lens system may be employed in an artificial eye, an accommodation measuring instrument and a dioptric telescope.
    Type: Application
    Filed: June 22, 2006
    Publication date: May 21, 2009
    Applicant: Wavelight AG
    Inventors: Volker Gotzinger, Andreas Schnalke, Arthur Michling, Kurt Heiberger
  • Patent number: 7533992
    Abstract: A new light source (e.g. LEDs) enables new designs in all or some key elements within diagnostic instruments. New light sources allow improvements in life of light source, infra red emitted, power consumption, color temperature, light flux directionality, simplification of optics design, adaptation of light flux directionality, and overall constructional simplification. The new light source allows for the replacement of some or all of the components designed for incandescent filament bulbs. The improved light source may allow for either an entirely new design of all or some core modules of the instrument, or by alteration of pre-existing modules.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: May 19, 2009
    Assignee: WJW Ltd.
    Inventor: William James Williams
  • Patent number: 7533993
    Abstract: An electro-active phoropter and a method of using the electro-active phoropter to measure a patient's vision prescription is disclosed. The electro-active phoropter includes a series of individually addressable electro-active lenses. The lenses have either a positive or negative optical power when an electrical potential is applied across the lens and a neutral optical power when no electrical potential is applied across the lens. Each lens provides an optical power that is part of a net optical power of the series of lenses when a patient views through the phoropter. The optical power of the phoropter can be incrementally adjusted by changing the distribution of the electrical potential across the different lenses of the series to provide increasing or decreasing optical power until a patient achieves a desired level of clarity and a vision prescription has been determined.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: May 19, 2009
    Assignee: E-Vision, LLC
    Inventors: Ronald D. Blum, William Kokonaski, Dwight P. Duston
  • Publication number: 20090051875
    Abstract: This disclosure describes systems and methods which utilize outcomes analysis, empirical and on-eye diagnostic fitting outcomes, and similar patient data to determine and provide a relatively optimal corrective device for the patient, in a single-use and disposable set of devices.
    Type: Application
    Filed: August 22, 2008
    Publication date: February 26, 2009
    Applicant: PARAGON VISION SCIENCES, INC.
    Inventor: Greg Kline
  • Publication number: 20090015789
    Abstract: Devices, systems, and methods measure, diagnose, and/or treat one or both eyes of a patient. Adaptive optics systems (such as those having a deformable mirror) may be configured to an aspherical or multi-spherical presbyopia-mitigating prescriptive shape to allow objective and/or subjective measurements of a candidate prescription. A plurality of viewing distances allow subjective and/or objective evaluations of performance using a light spot or a test viewing image. Measurements of aberrations at selected viewing conditions (including distances and/or brightness) with correlating pupil sizes may also be provided.
    Type: Application
    Filed: July 22, 2008
    Publication date: January 15, 2009
    Applicant: AMO Manufacturing USA, LLC
    Inventors: Guangming Dai, Seema Somani
  • Publication number: 20080316427
    Abstract: A method of simulating an optical effect, and/or characteristic of a selected ophthalmic lens design for a wearer is disclosed. In an embodiment, the method includes retrieving simulation data for the selected ophthalmic lens design and processing the simulation data to generate output image data for an output image simulating the optical effect and/or characteristic of the selected ophthalmic lens design. The output image is displayed, using a head-mounted display worn by the wearer, for viewing by the wearer. A system for simulating an optical effect, and/or characteristic of a selected ophthalmic lens design for a wearer is also disclosed.
    Type: Application
    Filed: November 15, 2006
    Publication date: December 25, 2008
    Applicant: CARL ZEISS VISION AUSTRALIA HOLDINGS LIMITED
    Inventors: Scott Fisher, Warwick Freeland
  • Publication number: 20080266521
    Abstract: Optical devices, systems, and methods can produce and/or measure cylindrical (as well as spherical) lens shapes throughout a range of both powers and cylindrical axes. Fluid focus lenses employ electrical potentials to vary the shape of a fluid/fluid interface between two immiscible fluids having differing indices of refractions by controlling localized angles between the interface and a surrounding container wall. Spherical power, cylindrical power, and cylindrical access alignment may be varied with no moving parts (other than the fluids).
    Type: Application
    Filed: July 15, 2008
    Publication date: October 30, 2008
    Applicant: AMO MANUFACTURING USA, LLC
    Inventor: Charles E. Campbell
  • Patent number: 7441896
    Abstract: Apparatus for use in measuring the density and spatial distribution of macular pigment in an eye comprises a camera (4) for capturing a color image of an eye, at least one filter (36) for filtering light reaching the camera (preferably by filtering the light illuminating the eye). The filter (36) has a transmission spectrum with one peak in the region of light absorbed by the pigment and another peak in a region where no such absorption occurs. The filter increases the sensitivity of the camera to macular pigment while enabling the effect of other pigments to be reduced or eliminated. A method of measuring macular pigment involves obtaining a color image of an eye, the image having two color components each having a spectrum having a respective one of said peaks.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: October 28, 2008
    Assignee: Millennium Diet and Neutriceuticals Limited
    Inventors: Richard Andrew Bone, John Thomas Landrum
  • Patent number: 7438416
    Abstract: An optometric apparatus for examining refractive power of an examinee's eye subjectively, capable of performing highly-precise examination.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: October 21, 2008
    Assignee: Nidek Co., Ltd
    Inventors: Akihiro Hayashi, Yoshinobu Hosoi, Hidetaka Hoshino
  • Publication number: 20080246922
    Abstract: An electro-active phoropter and a method of using the electro-active phoropter to measure a patient's vision prescription is disclosed. The electro-active phoropter includes a series of individually addressable electro-active lenses. The lenses have either a positive or negative optical power when an electrical potential is applied across the lens and a neutral optical power when no electrical potential is applied across the lens. Each lens provides an optical power that is part of a net optical power of the series of lenses when a patient views through the phoropter. The optical power of the phoropter can be incrementally adjusted by changing the distribution of the electrical potential across the different lenses of the series to provide increasing or decreasing optical power until a patient achieves a desired level of clarity and a vision prescription has been determined.
    Type: Application
    Filed: December 31, 2007
    Publication date: October 9, 2008
    Inventors: Ronald D. BLUM, William KOKONASKI, Dwight P. DUSTON
  • Patent number: 7413306
    Abstract: Optical devices, systems, and methods can produce and/or measure cylindrical (as well as spherical) lens shapes throughout a range of both powers and cylindrical axes. Fluid focus lenses employ electrical potentials to vary the shape of a fluid/fluid interface between two immiscible fluids having differing indices of refractions by controlling localized angles between the interface and a surrounding container wall. Spherical power, cylindrical power, and cylindrical access alignment may be varied with no moving parts (other than the fluids).
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: August 19, 2008
    Assignee: AMO Manufacturing USA, LLC
    Inventor: Charles E. Campbell
  • Publication number: 20080165324
    Abstract: An adaptive optics phoropter is aligned with a Badal optometer and an adjustable aperture component to subjectively determine an optimal vision correction as a power profile for an ophthalmic lens or ablating a cornea. The optimal power profile is preferably determined in an iterative process by adjusting the vergence of the Badal optometer and aperture size of the adjustable aperture component for power profiles with presbyopic power zones having different amplitudes, shapes, widths, and/or de-centering. Also included is a method of recursively computing a refractive surface with a regular presbyopic power zone (e.g., according to the optimal power profile) and adding it onto an underlying irregular Zernike-basis-set aberration-corrected surface in a linear fashion for fabricating an ophthalmic lens.
    Type: Application
    Filed: December 20, 2007
    Publication date: July 10, 2008
    Inventors: Joseph M. Lindacher, Rafael V. Andino, Scott R. Robirds, Teresa DeCenzo-Verbeten
  • Publication number: 20080158509
    Abstract: A visual acuity testing apparatus includes a target presenting unit for displaying various targets to be presented to a subject's eye, an optical element arranging device for retaining various optical elements, and selectively arranging the optical element corresponding to a response from the subject between the subject's eye and the target presenting unit, an operation section which is operated for selecting each of targets and each of the optical elements, a display section for displaying an operation image illustrating an operation content of the operation section, a memory for storing a plurality of target data illustrating each of the targets and operation image data illustrating the operation image, an arithmetic control section for extracting the target data and the operation image data from the memory according to an operation of the operation section, and an image output section having at least two output ports.
    Type: Application
    Filed: November 26, 2007
    Publication date: July 3, 2008
    Inventors: Atsushi Kubota, Tomohiro Sakurada
  • Patent number: 7264354
    Abstract: An electro-active phoropter and a method of using the electro-active phoropter to measure a patient's vision prescription is disclosed. The electro-active phoropter includes a series of individually addressable electro-active lenses. The lenses have either a positive or negative optical power when an electrical potential is applied across the lens and a neutral optical power when no electrical potential is applied across the lens. Each lens provides an optical power that is part of a net optical power of the series of lenses when a patient views through the phoropter. The optical power of the phoropter can be incrementally adjusted by changing the distribution of the electrical potential across the different lenses of the series to provide increasing or decreasing optical power until a patient achieves a desired level of clarity and a vision prescription has been determined.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: September 4, 2007
    Assignee: E-Vision, LLC
    Inventors: Ronald D. Blum, William Kokonaski, Dwight P. Duston
  • Patent number: 7258438
    Abstract: A system for approximating flux density of light on a human retina. A housing has an opening allowing light to pass to inside the housing. A baffle coupled to the housing replicates a facial cutoff function response for the light inside the housing. Two detectors are positioned to detect the light inside the housing. One detector produces a photopic spectral response function of the light inside the housing that approximately replicates a spectral response of the foveal cones in the retina. Another detector produces a scotopic spectral response function of the light inside the housing that approximately replicates a spectral response of rods in the retina. A processor coupled to the detectors calculates a mesopic flux density of the light inside the housing based on the photopic and scotopic spectral response functions.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: August 21, 2007
    Assignee: Rensselaer Polytechnic Institute
    Inventors: John Van Derlofske, Mark Rea, John Bullough, Andrew Bierman
  • Patent number: 7144112
    Abstract: An optometric apparatus (2) includes a rotary prism (136a, 136b) disposed in front of the eye (E), for adding a prism degree to the eye (E); a rotation device including a pulse motor (181, 184) and a rotation transmitting mechanism (146, 147, 176, 176a, 177, 177a, 178, 179, 182, 183, 185, 186) for transmitting rotation of the pulse motor to the rotary prism, the rotation device being adapted for rotating the rotary prism to change the prism degree; a command device (43a, 43b) for generating a command signal to start and stop the rotation of the rotary prism; and a control unit (60) for controlling the rotation device to drive the pulse motor to rotate at a speed of 5 pulses/sec. or more when the control unit receives the rotation start command signal until when receives the rotation stop command signal, and, to change the prism degree at a speed of 0.1 to 1.0 prism/sec.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: December 5, 2006
    Assignee: Nidek Co., Ltd.
    Inventor: Hirohisa Terabe
  • Patent number: 6939007
    Abstract: The invention provides photochromic bis-naphthopyran compounds as well as methods for their manufacture and their use. The bis-naphthopyran compounds of the invention exhibit a wide range of color, i.e., from pink to purple to blue gray, upon activation by a source of UV light. Additionally, the bis-naphthopyran compounds of the present invention exhibit broad coloration ability, fast response as to both color change on activation and return to original color, and good fatigue-resistance.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: September 6, 2005
    Inventors: Weili Zhao, Erick M. Carreira
  • Publication number: 20040156021
    Abstract: An electro-active phoropter and a method of using the electro-active phoropter to measure a patient's vision prescription is disclosed. The electro-active phoropter includes a series of individually addressable electro-active lenses. The lenses have either a positive or negative optical power when an electrical potential is applied across the lens and a neutral optical power when no electrical potential is applied across the lens. Each lens provides an optical power that is part of a net optical power of the series of lenses when a patient views through the phoropter. The optical power of the phoropter can be incrementally adjusted by changing the distribution of the electrical potential across the different lenses of the series to provide increasing or decreasing optical power until a patient achieves a desired level of clarity and a vision prescription has been determined.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 12, 2004
    Inventors: Ronald D. Blum, William Kokonaski, Dwight P. Duston
  • Patent number: 6749303
    Abstract: An optometry apparatus of the present invention comprises an optical element 26 provided in a correction optical system 1, which has a spherical lens 24 and a cylindrical lens 25 and which corrects examined eyes E to be subjected to optometry, wherein the optical element is used so that targets are seen as if they were dispersed in a plane orthogonal to an optical axis O1 and shown simultaneously at a different distance or position in a direction of an optical axis through the eyes E to be subjected to optometry.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: June 15, 2004
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Yasufumi Fukuma, Yasuo Kato, Makoto Fujino
  • Patent number: 6733128
    Abstract: Microscopes with a noncontact wide-angle viewing scope are used during surgeries on the eye, wherein an electromotively adjustable optic is provided between the lens and the eye. In order to prevent the surgeon from interrupting the surgery in order to refocus and to allow the electromotive drive to be maintained in a sterile condition, the drive is provided above the lens and is rotatably connected to an adjusting gear for the optic by means of a flexible drive shaft which can be released from the drive.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: May 11, 2004
    Assignee: Oculus Optikgeraete GmbH
    Inventor: Rainer Kirchhuebel
  • Patent number: 6698888
    Abstract: A subjective ophthalmic refractor of a type comprising a ring-shaped cylinder power scale having an internal gear actuated by a scale drive gear connected to a cylinder power adjustment knob of the refractor is improved by providing a bearing insert within the cylinder power scale. The bearing insert includes radially and axially facing annular bearing surfaces extending about a substantial portion of the scale, and a cut-out region allowing space necessary for the scale drive gear.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: March 2, 2004
    Assignee: Reichert, Inc.
    Inventor: Christopher Goris