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公开(公告)号：US20220383526A1
公开(公告)日：2022-12-01
申请号：US17826763
申请日：2022-05-27
发明人： Philippe PINAULT
摘要： A method for measuring a distance separating a camera from a reference object including a predetermined number of corners arranged in a pattern and at least two reference points separated by a reference length. The method includes acquiring an image including the reference object with the camera, detecting corners in the image, attributing a class to each corner, based on an orientation of the corner, detecting the reference object in the image based on the corners and attributed classes, placing the reference points in the image based on the corners of the reference object and measuring an imaged length separating the reference points, and comparing the reference length to the imaged length and obtaining the distance separating the camera from the reference object.
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2.发明公开公开(公告)号：US20240225441A1
公开(公告)日：2024-07-11
申请号：US18554355
申请日：2022-04-13
CPC分类号： A61B3/103 , A61B3/0025 , A61B3/14
摘要： A method for estimating refraction of an eye of an individual, including: a) providing a set of N acquired eccentric photorefraction images of the eye, b) setting values for a set of parameters including at least sphere, c) providing a set of N simulated eccentric photorefraction images, d) determining an estimator of a difference between the set of N acquired eccentric photorefraction images and the set of N simulated eccentric photorefraction images, e) performing an optimization using an optimization algorithm so as to optimize the estimator by adjusting values for the set of parameters and iterating steps c) and d), and f) deducing an estimation of at least one refraction parameter of the eye.
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公开(公告)号：US20230255474A1
公开(公告)日：2023-08-17
申请号：US18005271
申请日：2021-07-15
CPC分类号： A61B3/032 , A61B3/0033 , A61B3/005 , G06T7/50 , G06T3/40 , A61B2090/061
摘要： A method for evaluating the visual acuity of a person using a mobile device having at least a front camera and a screen, the method including a user positioning step during which the user of a mobile device positions himself in front of a mirror at a predefined distance d/2, a mobile device positioning step during which the mobile device is positioned with the front camera of the mobile device facing the mirror, a distance measuring step during which a distance d between the front camera of the mobile device and a virtual image of the mobile device in the mirror is measured, a displaying step during which the screen of the mobile device displays optotypes, and an evaluation step during which the visual acuity of the user is evaluated.
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公开(公告)号：US20220304569A1
公开(公告)日：2022-09-29
申请号：US17615760
申请日：2020-06-04
摘要： A method and associated instrument in which an optical system is switched from a first to a second refractive power states, to provide a first, and then a second refraction correction to an eye of a subject, the switching being carried on without interrupting a light beam coming from a target object and transmitted by the optical system to the eye of the subject. The switching is carried on in order to circumvent an intermediate refraction correction that is in between said first and second refraction corrections, or with a speed higher than a given limit.
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公开(公告)号：US20230190093A1
公开(公告)日：2023-06-22
申请号：US18062666
申请日：2022-12-07
CPC分类号： A61B3/09 , A61B3/0025 , A61B3/0091 , A61B3/103
摘要： The invention relates to a method for determining an ophthalmic lens intended to be worn by an individual, said ophthalmic lens being adapted to provide to the individual a vision correction at at least one given vision gaze direction, said vision correction being based on wearer data including prescription data of the individual,
wherein the method comprises the steps of:
determining a parameter pertaining to the accommodative dynamics of an eye of the individual,
determining said ophthalmic lens based on said wearer data and on the parameter pertaining to the accommodative dynamics of an eye of the individual.
The invention also relates to a device for determining the parameter pertaining to the accommodative dynamics of an eye of an individual in the method according to the invention.-
公开(公告)号：US20220015623A1
公开(公告)日：2022-01-20
申请号：US17295363
申请日：2018-11-20
摘要： A process, phoropter, and an optometry system, the process being for correction of the shift of the optical power of an active lens in a phoropter due to a temperature change over time, the active lens including a container filled with a liquid and having a deformable curvature membrane under the action of an actuator controlled by an optical power control command, the shift being that the active lens provides an actual optical power that is different from the expected optical power corresponding to the optical power control command. A temperature sensor is arranged in and/or on the phoropter to measure the temperature in the phoropter.
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公开(公告)号：US20200069174A1
公开(公告)日：2020-03-05
申请号：US16467337
申请日：2017-10-23
发明人： Gildas MARIN , Philippe PINAULT
摘要： Disclosed is an apparatus for measuring subjective ocular refraction including a display device configured to display a least one optotype and a refractive optical system arranged between an eye of a viewer and the display device, the refractive optical system having an optical power that can be varied according to a determined minimum step. The display device further includes a unit for varying optical power designed to generate a variation in the spherical and/or cylindrical optical power, such that the display device and the refractive optical system form a first image of the optotype with a first total optical power and, respectively, a second image of the optotype with a second total optical power, the variation in optical power between the first total optical power and the second total optical power being less than the determined minimum step.
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