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公开(公告)号：US11998271B2
公开(公告)日：2024-06-04
申请号：US17285449
申请日：2018-10-25
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD. , Junzhong Liang
Inventor： Junzhong Liang , Ling Yu
CPC classification number: A61B3/032 , A61B3/0058 , A61B3/0285 , A61B3/103
Abstract: Methods and systems am disclosed in which an optical diagnosis of an eye's optical image quality is performed using a simulated retinal image. An objective measurement of a total wave aberration is obtained, and residual aberrations are computed by subtracting a sphero-cylindrical correction from the total wave aberration. The simulated retinal image is computed by computing a point-spread function from the residual aberrations and convolving the computed point-spread function with an acuity chart. The optical diagnosis includes at least one of: determining excess aberrations, ranking optics of the eye into optical grades, selecting the eye for high-definition eyeglasses, identifying amblyopia or macular diseases, or choosing an objective refraction for vision correction.
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公开(公告)号：US20210018764A1
公开(公告)日：2021-01-21
申请号：US17062350
申请日：2020-10-02
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
Abstract: Methods and systems for determining a refractive correction for eyeglasses involve obtaining an objective measurement of a wave aberration. The objective measurement includes an objective spherical power (SPH_o), an objective cylinder power (CYL_o), an objective cylinder axis (AXIS_o), and other residual aberrations; and uses objective vision optimization to achieve a best image quality for the eye from the residual aberrations. A prescription cylinder power (CYL_p), is determined using a software module, where an absolute value of CYL_p is less than an absolute value of CYL_o and achieves an acuity of at least 20/20. A prescription spherical power (SPH_s) is determined subjectively by dialing into a phoropter module a cylinder correction according to the prescription cylinder power (CYL_p) from the software module and the objective cylinder axis (AXIS_o) according to the objective aberrometer module. A prescription for an ophthalmic lens of the eyeglasses is generated that includes SPH_s, CYL_p and AXIS_o.
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公开(公告)号：US10893798B2
公开(公告)日：2021-01-19
申请号：US16321422
申请日：2016-08-09
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD. , Junzhong Liang
Inventor： Junzhong Liang
Abstract: Methods and systems for producing a refractive prescription for a consumer away from an optical office are disclosed. At a first time point, a first prescription for a first pair of corrective lenses is generated according to measured refractive errors, and a historical visual acuity profile is measured using the first prescription and a varying spherical power. At a second time point, a second visual acuity is measured using the first prescription. A new spherical power is computed using the historical visual acuity profile and the second visual acuity. A second prescription for a second pair of corrective lenses is generated based on the first prescription and the new spherical power. In some embodiments, the second visual acuity may be self-administered by the consumer away from an optical office.
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公开(公告)号：US10884265B2
公开(公告)日：2021-01-05
申请号：US16593205
申请日：2019-10-04
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
Abstract: Methods, devices, and systems are disclosed for determining refractive corrections of human eyes to reduce and eliminate image distortion associated with eyeglasses. In some embodiments, an objective refraction module is configured to measure refractive errors of an eye objectively, without subjective feedback from a tested subject. A computation module is configured to generate a plurality of objective prescriptions. A phoropter module is configured to perform a subjective refraction for determining a plurality of subjective spherical powers based on the plurality of objective prescriptions. An output module is configured to generate a plurality of prescriptions for eyeglasses, the plurality of prescriptions comprising (a) a first prescription having a first subjective spherical power fs1, a first objective cylinder power Fc1, and a first objective cylinder angle Fa1, and (b) a second prescription having a second subjective spherical power fs2, a second objective cylinder power Fc2, and a second objective cylinder angle Fa2.
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5.发明申请公开(公告)号：US20190335993A1
公开(公告)日：2019-11-07
申请号：US16321422
申请日：2016-08-09
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
Abstract: Methods and systems for producing a refractive prescription for a consumer away from an optical office are disclosed. At a first time point, a first prescription for a first pair of corrective lenses is generated according to measured refractive errors, and a historical visual acuity profile is measured using the first prescription and a varying spherical power. At a second time point, a second visual acuity is measured using the first prescription. A new spherical power is computed using the historical visual acuity profile and the second visual acuity. A second prescription for a second pair of corrective lenses is generated based on the first prescription and the new spherical power. In some embodiments, the second visual acuity may be self-administered by the consumer away from an optical office.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180164610A1
公开(公告)日：2018-06-14
申请号：US15372684
申请日：2016-12-08
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
CPC classification number: G02C13/005 , A61B3/0025 , A61B3/0041 , A61B3/0091 , A61B3/112 , G02C13/003 , G06T19/20 , G06T2219/2004 , H04N13/204
Abstract: Methods and systems include using a digital camera module for capturing a plurality of digital images of a tested subject at a plurality of perspective views. The tested subject is not required to move their head position or viewing direction during the capturing of images. A motion control module I) rotates the camera module with its optical axis pointing at a rotation center to correct any orientation error in capturing the perspective views, and II) positions the camera module to adjust the rotation center for accommodating different head positions of the tested subject. A computer module processes and stores the plurality of digital images to fit an eyeglass frame to the tested subject or to acquire data for fitting prescription lenses into the eyeglass frame. The computer module can provide an augmented reality of different styles of eyeglasses, and obtain 3D measurements for fitting eyeglass frames.
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7.发明申请公开(公告)号：US20170329154A1
公开(公告)日：2017-11-16
申请号：US15631935
申请日：2017-06-23
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
CPC classification number: G02C7/027 , A61B3/0033 , A61B3/0285 , A61B3/1015 , A61B3/103 , A61B3/185 , G02C2202/22
Abstract: Methods, devices, and systems are disclosed for determining refractive corrections of human eyes to reduce and eliminate image distortion associated with eyeglasses. In some embodiments, an objective refraction module is configured to measure refractive errors of an eye objectively, without subjective feedback from a tested subject. A computation module is configured to generate a plurality of objective prescriptions. A phoropter module is configured to perform a subjective refraction for determining a plurality of subjective spherical powers based on the plurality of objective prescriptions. An output module is configured to generate a plurality of prescriptions for eyeglasses, the plurality of prescriptions comprising (a) a first prescription having a first subjective spherical power fs1, a first objective cylinder power Fc1, and a first objective cylinder angle Fa1, and (b) a second prescription having a second subjective spherical power fs2, a second objective cylinder power Fc2, and a second objective cylinder angle Fa2.
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8.发明申请公开(公告)号：US20200033633A1
公开(公告)日：2020-01-30
申请号：US16593205
申请日：2019-10-04
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
Abstract: Methods, devices, and systems are disclosed for determining refractive corrections of human eyes to reduce and eliminate image distortion associated with eyeglasses. In some embodiments, an objective refraction module is configured to measure refractive errors of an eye objectively, without subjective feedback from a tested subject. A computation module is configured to generate a plurality of objective prescriptions. A phoropter module is configured to perform a subjective refraction for determining a plurality of subjective spherical powers based on the plurality of objective prescriptions. An output module is configured to generate a plurality of prescriptions for eyeglasses, the plurality of prescriptions comprising (a) a first prescription having a first subjective spherical power fs1, a first objective cylinder power Fc1, and a first objective cylinder angle Fa1, and (b) a second prescription having a second subjective spherical power fs2, a second objective cylinder power Fc2, and a second objective cylinder angle Fa2.
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公开(公告)号：US20180164609A1
公开(公告)日：2018-06-14
申请号：US15372676
申请日：2016-12-08
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
CPC classification number: G02C13/005 , A61B3/0025 , A61B3/10 , A61B3/111 , A61B3/14 , G02C13/00 , G02C13/003
Abstract: Methods and systems for making measurements for eyeglass frames worn by human subjects include capturing, using a first digital camera module, a plurality of images of a head of a tested subject wearing an eyeglass frame. The plurality of images comprises a front view image and a side view image of a face of the tested subject. A second camera module is used to monitor a top view of the head. A computer module is used to process the front view image and the side view image. The front view image is used to determine a pupillary distance and a segment height, and the side view image is used to determine a vertex distance and a pantoscopic tilt.
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10.发明申请公开(公告)号：US20170325682A1
公开(公告)日：2017-11-16
申请号：US15151491
申请日：2016-05-11
Applicant: PERFECT VISION TECHNOLOGY (HK) LTD.
Inventor： Junzhong Liang
CPC classification number: A61B3/18 , A61B3/0025 , A61B3/0033 , A61B3/0285 , A61B3/032 , A61B3/1015 , A61B3/103
Abstract: Methods, devices, and systems are disclosed for determining refractive corrections of human eyes to reduce and eliminate image distortion associated with eyeglasses. In some embodiments, an objective refraction module is configured to measure refractive errors of an eye objectively, without subjective feedback from a tested subject. A computation module is configured to generate a plurality of objective prescriptions. A phoropter module is configured to perform a subjective refraction for determining a plurality of subjective spherical powers based on the plurality of objective prescriptions. An output module is configured to generate a plurality of prescriptions for eyeglasses, the plurality of prescriptions comprising (a) a first prescription having a first subjective spherical power fs1, a first objective cylinder power Fc1, and a first objective cylinder angle Fa1, and (b) a second prescription having a second subjective spherical power fs2, a second objective cylinder power Fc2, and a second objective cylinder angle Fa2.
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