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68 results about "Accommodation" patented technology

Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. In this, distances vary for individuals from the far point—the maximum distance from the eye for which a clear image of an object can be seen, to the near point—the minimum distance for a clear image.

Determining clinical refraction of eye

A method of measuring eye refraction to achieve desired quality according to a selected vision characteristics comprising the steps of selecting a characteristic of vision to correlate to the desired quality of vision from a group of vision characteristics comprising acuity, Strehl ratio, contrast sensitivity, night vision, day vision, and depth of focus, dynamic refraction over a period of time during focus accommodation, and dynamic refraction over a period of time during pupil constriction and dilation; using wavefront aberration measurements to objectively measure the state of the eye refraction that defines the desired vision characteristic; and expressing the measured state of refraction with a mathematical function to enable correction of the pre-selected vision characteristic to achieve the desired quality of vision. The mathematical function of expression may be a Zernike polynomial having both second order and higher order terms or a function determined by spline mathematical calculations. The pre-selected desired vision characteristics may be determined using ray tracing technology.
Owner:TRACEY TECH

Apparatus and method for accommodative stimulation of an eye and simultaneous ipsilateral accommodative imaging

An apparatus comprising an accommodative stimulation device, an electromagnetic wave exposure device, and an imaging device. The apparatus acquires imaging information about an eye by means of the electromagnetic wave exposure device and the imaging device as the apparatus simultaneously stimulates the eye to undergo at least one reversible accommodative transition from any first state of accommodation to any second state of accommodation by means of the accommodative stimulation device. The accommodative stimulation device has an axis of projection that is substantially perpendicular to a visual axis of the eye, along which axis of projection an adjustable accommodative target is projected through a system of Badal optics, having a Badal optical axis coincident with the axis of projection, to strike a half-silvered mirror lying in a plane that forms an angle of about 45 degrees with the axis of projection and the visual axis of the eye.
Owner:RENESSELAER POLYTECHNIC INST

System and method for presenting image content on multiple depth planes by providing multiple intra-pupil parallax views

An augmented reality display system is configured to direct a plurality of parallactically-disparate intra-pupil images into a viewer's eye. The parallactically-disparate intra-pupil images provide different parallax views of a virtual object, and impinge on the pupil from different angles. In the aggregate, the wavefronts of light forming the images approximate a continuous divergent wavefront and provide selectable accommodation cues for the user, depending on the amount of parallax disparity between the intra-pupil images. The amount of parallax disparity is selected using a light source that outputs light for different images from different locations, with spatial differences in the locations of the light output providing differences in the paths that the light takes to the eye, which in turn provide different amounts of parallax disparity. Advantageously, the wavefront divergence, and the accommodation cue provided to the eye of the user, may be varied by appropriate selection of parallax disparity, which may be set by selecting the amount of spatial separation between the locations of light output.
Owner:MAGIC LEAP

Display system and method for providing variable accommodation cues using multiple intra-pupil parallax views formed by light emitter arrays

A display system is configured to direct a plurality of parallactically-disparate intra-pupil images into a viewer's eye. The parallactically-disparate intra-pupil images provide different parallax views of a virtual object, and impinge on the pupil from different angles. In the aggregate, the wavefronts of light forming the images approximate a continuous divergent wavefront and provide selectable accommodation cues for the user, depending on the amount of parallax disparity between the intra-pupil images. The amount of parallax disparity may be selected using an array of shutters that selectively regulate the entry of image light into an eye. Each opened shutter in the array provides a different intra-pupil image, and the locations of the open shutters provide the desired amount of parallax disparity between the images. In some other embodiments, the images may be formed by an emissive micro-display. Each pixel formed by the micro-display may be formed by one of a group of light emitters, which are at different locations such that the emitted light takes different paths to the eye, the different paths providing different amounts of parallax disparity.
Owner:MAGIC LEAP

Stereoscopic display with reduced accommodation fatique

A stereoscopic display device is provided for displaying a three-dimensional (3D) image as viewed by eyes consisting of a left eye and a right eye. In the display device, a single display screen, or separate left and right display screens, present a left image to the left eye but not the right eye, and present a right image to the right eye but not the left eye. A gaze distance tracker is configured to track gaze distance of the eyes. Variable-power lenses include a left variable-power lens arranged to provide eye accommodation for the left eye, and a right variable-power lens arranged to provide eye accommodation for the right eye. An electronic eye accommodation controller is configured to control the power of the variable power lenses to allow the image from the display to be focused on the retina, while the biological eye lens is accommodated to the gaze distance.
Owner:KENT STATE UNIV

Systems and methods for 360 video capture and display based on eye tracking including gaze based warnings and eye accommodation matching

Systems and methods may provide for capturing 360 degree video, and multi-resolution encoding, processing and displaying of the video based on a field of view (FOV) and region of interest (ROI) for a viewer. The ROI may be determined based on eye tracking information (ETI) and the video may be encoded for viewports within the FOV at a high resolution and for other viewports outside the FOV at a lower resolution. ROI in the video may be encoded at a high resolution and areas outside of the ROI may be encoded at a lower resolution. The ETI enables the selective display of one or more warnings based on the gaze of a user to improve the efficiency of the warning. 3D glasses having variable lens may be used to adjust the focal distance of a virtual display to match a virtual distance of an object based on stereo distance cues.
Owner:INTEL CORP

Lens barrel module and lens assembly including the same

A lens barrel module is disclosed to include a lens barrel unit and a flow path unit. The lens barrel unit extends along an axis and includes a peripheral wall that surrounds the axis and that has a first end adjacent to an object side of a lens assembly and a second end opposite to the first end and adjacent to an image side of the lens assembly. The peripheral wall defines an accommodation space configured as a series of accommodation sections for receiving the optical members. The flow path unit is formed in the lens barrel module and is in spatial communication with at least two of the accommodation sections. A lens assembly including the lens barrel module is also disclosed.
Owner:GENIUS ELECTRONICS OPTICAL XIAMEN

Impedance sensor for ophthalmic device using shared antenna electrode

A contact lens system includes a shared antenna electrode, an accommodation actuator to provide variable optical power, and a controller coupled to the accommodation actuator and the shared antenna electrode. The controller including logic for arbitrating access to the shared antenna electrode between an impedance sensor and a communication circuit; selectively establishing an oscillator with the impedance sensor and the shared antenna electrode; correlating an oscillation condition of the oscillator to an accommodation setting; and adjusting the variable optical power of the accommodation actuator based upon the accommodation setting. An impedance across the shared antenna electrode varies based upon an amount an eyelid overlaps the contact lens system when the contact lens system is worn on an eye.
Owner:TWENTY TWENTY THERAPEUTICS LLC

Eye accommodation distance measuring device and method for head-mounted display, and head-mounted display

An eye accommodation distance determining device is provided. The eye accommodation distance determining device includes an interferometer configured to generate a plurality of frequency modulated laser beams in different directions and to generate a plurality of interferometric signals using laser beams reflected from eye reflecting surfaces, a signal processer configured to generate a signal spectrum using each of said plurality of interferometric signals, a distance determiner configured to determine distances to the eye reflecting surfaces for each of said plurality of frequency modulated laser beams, a point coordinates determiner configured to determine coordinates of points on each of the eye reflecting surfaces for each of the laser beams, a reconstructor configured to generate an eye inner structure model based on the determined coordinates of points, and an eye accommodation distance determiner configured to determine, based on said eye inner structure model, an eye accommodation distance.
Owner:SAMSUNG ELECTRONICS CO LTD

Optical imaging lens with a fixing structure

A lens includes a barrel and a first optical element. The barrel includes an inner circumferential surface surrounding an axis and defining an accommodation space, an object side and an image side spaced at two ends of the axis and interconnecting with the accommodation space, and a first mounting portion integrally formed around the inner circumferential surface. The first mounting portion includes a first blocking portion having a first blocking surface corresponding to the object side. The first optical element is received in the accommodation space, and disposed in the first mounting portion, and includes a first body portion and a first stopping portion. The first stopping portion includes a first stopping surface leaning against the first blocking surface. The distance between an outermost edge of the first stopping portion and the axis is greater than the distance between an innermost edge of the first blocking portion and the axis.
Owner:GENIUS ELECTRONICS OPTICAL XIAMEN

Tunable-lens-based refractive examination

An apparatus, and corresponding method, for determining a refractive property of an eye includes a housing with a port configured to receive an eye and also light from the eye. A tunable lens can be mounted to the housing to apply a variable focal power to the light from the eye and to pass the light along an optical path toward a wavefront sensor within the housing. The wavefront sensor can receive the light via the optical path and measure a wavefront thereof. A determination module can be configured to determine a property of the eye based on the wavefront. Embodiments can be handheld, portable, and open view, while providing objective wavefront aberrometry, subjective phoroptry, and accommodation and presbyoptic evaluation, as well as lensometry functions.
Owner:PLENOPTIKA INC

Apodized hybrid diffractive-refractive IOL for pseudo-accommodation

In certain embodiments, an ophthalmic lens comprises an optic. The optic has an optical axis and surfaces comprising an anterior surface and a posterior surface. At least one of the surfaces has an inner refractive region and a refractive-diffractive structure disposed outwardly from the inner refractive region in a direction away from the optical axis. The inner refractive region is adapted to contribute refractively to a distance focus optical power. The refractive-diffractive structure comprises one or more diffractive regions and one or more refractive regions. A diffractive region is adapted to contribute diffractively to a multi-zone optical power, and a refractive region is adapted to contribute refractively to the distance focus optical power.
Owner:NOVARTIS AG

Camera module

InactiveCN105700104AReduce thicknessAchieving auto-focus functionMountingsPhysicsCamera lens
The invention relates to a camera module. The camera module comprises a driving motor, a first lens module, a second lens module, a lens seat, an imaging unit and a casing, wherein the lens seat comprises an accommodation chamber, and the first lens module and the second lens module are accommodated in the accommodation chamber. The camera module is characterized in that the first lens module and the second lens module are respectively fixed at two opposite ends of the lens seat, the imaging unit is accommodated in the accommodation chamber and is fixed with the casing relatively, the imaging unit is arranged between the first lens module and the second lens module, the first lens module, the second lens module and the imaging unit realize optical alignment, and the driving motor is used for driving the lens module to move relative to the imaging unit so as to change a relative distance between the first lens module and / or the second lens module and the imaging unit.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1

Ophthalmic system including accommodating intraocular lens and remote component and related methods of use

Ophthalmic systems and methods of changing an optical power of an ophthalmic system are described. In an example, the ophthalmic system includes an accommodating intraocular device shaped to be implantable in an eye and an extraocular device separate from the accommodating intraocular device shaped to be removably mountable to a portion of the eye outside a bulb of the eye, such as an underlid portion of the eye. In an example, the method includes wirelessly transmitting power from a power source of an extraocular device removably mounted outside a bulb of an eye to an accommodating intraocular device implanted in the eye. In an example, the method includes sensing with an accommodation sensor biological accommodation signals of the eye; generating accommodation control signals representative of the biological accommodation signals; and driving an accommodation actuator disposed in the accommodating intraocular device based on the accommodation control signals to change an optical power of the ophthalmic system.
Owner:VERILY LIFE SCI LLC

Hood for an ophthalmic device

InactiveUS20170049321A1Reducing accommodation responseDecreasing depth of focusRefractometersCamera filtersPupilVisual perception
The present invention describes a rectangular parabolic hood for blocking accommodation and reducing depth of focus to offset the negative affects of extraneous light and visual stimulus during examination of the pupil using ophthalmic instruments.
Owner:NGUYEN KELVIN

Camera module

A camera module is provided. The camera module includes a first lens group including a foremost lens disposed closest to an object; a second lens group including a rearmost lens disposed closest to an imaging plane; and a lens barrel in which a first accommodation space and a second accommodating space are formed, the first accommodation space configured to accommodate the first lens group therein, and the second accommodating space configured to accommodate the second lens group therein. The second accommodation space may become narrower from an object side toward the imaging plane.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD

Comprehensive Intraocular Vision Advancement

An intraocular implant device for comprehensive intraocular vision advancement includes an intraocular implant body shaped for positioning inside a lens chamber of an eye. In some embodiments, the implant includes an optical adjustable base accommodating lens configured to provide both base adjustment and accommodation. In further embodiments, the implant includes a photoelectric sensor operable to receive incident light through the cornea and to convert the received light into electrical energy for use with one or more circuit components disposed on the body, and wherein the photoelectric sensor is also operable to convert the received light into image data. The ocular implant device may include a projector for projecting the image data onto the retina of a user. The ocular implant may additionally include an autofocusing digital camera, an autofocusing electromechanical lens array, and sensors for detecting glucose levels and / or intraocular eye pressure.
Owner:ENVIA TECH INC

Measurement method for the determination of a value of a visual correction need for near vision of an individual

Disclosed is a measurement method for determining a value of a visual correction need for near vision of an individual in a natural posture for near vision. A recognizing limit distance is determined so that the individual is able to recognize at least one predetermined symbol farther than the limit distance relatively to the individual and unable to recognize the at least one predetermined symbol closer to the individual than the limit distance. A portable medium displaying the predetermined symbol is displaced in front of the face and eyes of the individual to change a frontal distance between his / her eyes and the portable medium and in which when a recognizing limit distance is detected by the individual, the limit distance is measured and the value of the visual correction need is determined from the measured limit distance, wherein the visual correction need includes an accommodation compensation need.
Owner:ESSILOR INT CIE GEN DOPTIQUE
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