19 results about "Eye measurements" patented technology

Aspects of the present invention may include systems and methods for intraocular lens selection using a formula and a deep learning machine to estimate the error of the formula. In an aspect, the disclosure provides a method for intraocular lens selection. The method may include obtaining at least two ocular measurement parameters and a lens selection parameter for an eye. The method may include determining an intraocular lens power based on a formula using the at least two ocular measurement parameters. The method may include determining an estimated error of the formula using a deep learning machine trained on verified post-operative results using intraocular lenses selected by the formula. The method may include adjusting the lens selection parameter based on the estimated. The method may include redetermining the intraocular lens power based on the formula and the adjusted lens selection parameter.

A system for a full-field OCT eye measurement, comprising:—a source (1) of a light beam (2),—a detector (3), preferably in form of a camera,—an interferometer, comprising a reference arm (4) and a sample arm (5),—a beam splitter (6), configured to receive the light beam (2) and to split the light beam (2) into a sample beam (7) and a reference beam (8) and further configured to direct the sample beam (2) to the sample arm (5) and the reference beam (8) to the reference arm (4) respectively, wherein the sample arm (5) is configured for guiding the sample beam (7) through a point on the cornea of a subject's eye (9) into the subject's eye (9) and back to the detector through the beam splitter (6), wherein the reference arm (4) is configured for guiding the reference beam (8) to a mirror (10) and back to the detector (3) through the beam splitter (6), wherein said detector (3) is configured and programmed for comparing the sample beam (7) and the reference beam (8) for detecting diseases of the subject's eye (9). The system is characterized in that it comprises an arrangement for decreasing the intensity of the sample beam (7) passing through the point of the cornea of the subject's eye (9).

Eye data is captured with one or more sensors of a head mounted device. The one or more sensors are configured to sense an eyebox region. A differential value is generated by comparing the eye data to previous data. A user notification is generated in response to the differential value reaching an outlier threshold value.

The present invention provides a device for examining the binocular vision and methods for analyzing vision binocularity utilizing the device. Generally the device has at least a laser channel configured to emit laser beams for ray tracing, a beam divider, right-eye and left-eye measurement channels, a processing unit and an electro-mechanical. The methods compare processed data from the right-eye and left-eye measuring channels to calculate correlation coefficients for near and far vision, to evaluate mirror asymmetry of wave front errors of the eyes, by considering potential involvement of anisocoria due to a planned surgery, and utilizing a neurological summing potential by a binocularity vision index.

The invention relates to a system for an optoretinography eye measurement, comprising: a source of an input light beam (1), a light detector (2), preferably in form of a camera, an interferometer, comprising a reference arm (3) and an object arm (4), a first beam splitter (5), configured to receive the input light beam (1) from the source and to splitthe input light beam (1) into an object light beam (7) and a reference light beam (6) and further configured to direct the input light beam (1) to the object arm and the reference light beam (6) to the reference arm (3) respectively, wherein the object arm (4) is configured for guiding the object light beam (7) through the cornea of a subject's eye into the subject's eye and back to the light detector (2), wherein the reference arm (3) is configured for guiding the reference light beam (6) to a mirror (8) and back to the light detector (2), wherein said light detector (2) is configured and programmed for recording the object light beam (7) interfered with the reference light beam (6) for detecting diseases of the subject's eye. The system characterizes in that it further comprises a source of a stimulus light (9) and a second beam splitter (10) configured for projecting a stimulus light (9) onto the subject's eye through the second beam splitter (10), wherein the second beam splitter (10) is arranged within the path of the stimulus light (9) between the source of the stimulus light (9) and the patient's eye and is configured to receive the stimulus light (9) and to direct the stimulus light (9) onto the patient's eye and the stimulus light (9) is in a form of a pattern varying in space or varying in time. The invention also relates to a method for an optoretinography eye measurement.

To provide an ophthalmologic apparatus capable of appropriately measuring convergence accommodation.SOLUTION: An ophthalmologic apparatus 100 includes a target presentation unit (41) for presenting a target 8 to right and left eyes E to be examined and objective measurement optical systems 6 and 7 for objectively measuring eye characteristics of the two eyes E to be examined. The target presentation unit changes a convergence position R where two visual lines intersect with each other from the position of the two eyes E to be examined and presents the target 8 in a state that a pin hole (50) is arranged at a position conjugate with the pupils of the two eyes E to be examined. The objective measurement optical systems 6 and 7 acquire an objective refractive power of the right and left eyes E to be examined in a state that the target 8 presented at the convergence position R is fused while the target presentation unit is arranging the pin hole.SELECTED DRAWING: Figure 6

The invention relates to a method (1) for determining eye measurements comprising the following steps: selecting (100) an image in a video stream, identifying (200) a known object in the image, detecting (300) a face in the image, said face having two sides, each side having an eye and an ear, determining (400) an eye measurement of the face using a reference length of the known object, characterized in that the image selection step comprises the following substeps: detecting (101) the face in the video stream, determining (106) for each side of the face an eye ordinate and an ear ordinate, determining (107) for each side of the face an eye-to-ear length, selecting (110) the image in the video stream such that the eye ordinates, ear ordinates, and eye-to-ear lengths meet certain criteria. Figure for the abstract: [Fig. 1]

An eye measurement system includes an optical system. The eye measurement system is disposed in a housing which includes an aperture for providing light to and from the optical system and a subject's eye while the subject is separated and spaced apart from the housing, and the eye is not maintained in a fixed positional relationship with respect to the housing. An optical system movement arrangement moves the optical system. An automatic eye tracking arrangement ascertains a current positional relationship of the eye with respect to the optical system without human assistance, and in response thereto controls the optical system movement arrangement to move the optical system into a predetermined positional relationship with respect to the eye, for measurement of the eye, without human assistance. The eye measurement system can make objective, and / or subjective, refraction measurements of the eye.

A system and method for selecting an intraocular lens, for implantation into an eye, includes a controller having a processor and a tangible, non-transitory memory on which instructions are recorded. The controller is configured to selectively execute a machine learning model trained with a training dataset. Execution of the instructions by the processor causes the controller to obtain pre-operative objective data for the patient, including one or more anatomic eye measurements. The controller is configured to obtain pre-operative questionnaire data for the patient, including at least one personality trait. The pre-operative objective data and the pre-operative questionnaire data are entered as respective inputs to the machine learning model. A predicted subjective outcome score for the patient is generated as an output of the machine learning model. The intraocular lens is selected based in part on the predicted subjective outcome score.

The invention relates to a method (1) for determining eye measurements comprising the following steps: - selecting (100) an image in a video stream, - identifying (200) a known object in the image, - detecting (300) a face in the image, said face comprising two sides, each side comprising an eye and an ear, - determining (400) an eye measurement of the face using a reference length of the known object, characterized in that the step of selecting the image comprises the following sub-steps, - detecting (101) the face in the video stream, - determining (106) for each side of the face an eye y-coordinate, and an ear y-coordinate, - determining (107) for each side of the face an eye-ear length, - selecting (110) the image in the video stream so that the eye y-coordinates, the ear y-coordinates and the eye-ear lengths meet certain criteria.

A system and method for selecting an intraocular lens, for implantation into an eye, includes a controller having a processor and a tangible, non-transitory memory on which instructions are recorded. The controller is configured to selectively execute a machine learning model trained with a training dataset. Execution of the instructions by the processor causes the controller to obtain pre-operative objective data for the patient, including one or more anatomic eye measurements. The controller is configured to obtain pre-operative questionnaire data for the patient, including at least one personality trait. The pre-operative objective data and the pre-operative questionnaire data are entered as respective inputs to the machine learning model. A predicted subjective outcome score for the patient is generated as an output of the machine learning model. The intraocular lens is selected based in part on the predicted subjective outcome score.

A method for operating a driver assistance system includes triggering an assistance measure according to a current degree of attentiveness of a vehicle occupant while a motor vehicle is traveling. The current degree of attentiveness is identified in that, during travel and within an observation interval, a current eye opening width of at least one eye of the vehicle occupant is recorded several times as the distance between an upper and a lower eye measurement point, and a frequency distribution of the various eye opening widths is calculated for the at least one observation interval. Comparative frequency distributions are provided, with a known degree of attentiveness being assigned to each comparative frequency distribution. On the basis of a comparison, it is determined which of the comparative frequency distributions is closest to the frequency distribution observed.

The utility model relates to the technical field of eye reshaping and discloses an eye reshaping auxiliary device which comprises a central shaft, a fixed plate and a rotating plate, the fixed plate and the rotating plate rotate on the outer surface of the central shaft, the right side face of the fixed plate is fixedly connected with an arc-shaped plate, and the front side of the outer surface of the rotating plate is fixedly connected with a fixed column. According to the eye shaping auxiliary device, the fixed plate, the rotating plate, the arc-shaped plate, the damping block and the measuring needles are used in cooperation, so that a worker can measure eye size data through the distance between the tip ends of the two sets of measuring needles, and the distance between the tip ends of the measuring needles is magnified on scale marks on the arc-shaped plate by two times; meanwhile, the damping block plays a role in limiting the rotation of the rotating plate, and the rotating plate is difficult to rotate under the condition of non-manual pulling, so that the accuracy of eye measurement is further improved, the tip end of the measuring needle is easy to align with eye nodes, and meanwhile, the rotating plate with the damping is convenient for a worker to read and record data.

The invention belongs to the technical field of biological experiment auxiliary instruments, and discloses an ophthalmology medical equipment accessory and ophthalmology medical equipment. The ophthalmic medical device accessory includes a forehead rest bracket and a fixture. The forehead support bracket comprises two support columns which are symmetrically arranged; the top of the supporting column is detachably provided with a supporting platform or a forehead support part through a fixing piece. The forehead support part is used for abutting against the forehead during eye measurement, and the supporting platform is used for placing an animal to be measured. The ophthalmic medical equipment comprises the ophthalmic medical equipment accessory. According to the ophthalmology medical equipment accessory, the supporting platform is detachably and fixedly installed on the supporting column through the fixing piece, the supporting platform is stably installed, after an animal to be detected is placed on the supporting platform, the animal to be detected is stably placed, and the image collection accuracy is effectively improved.

An eye-tracking system includes a controller configured to target one or both of a user's left and right eyes: receiving eye measurement data associated with the eye; determining the optical axis of the eye based on the eye measurement data; selecting one of a plurality of eye models based on the direction of the optical axis; and determining the gaze vector of the eye by applying the selected eye model to the eye measurement data.

The disclosure provides for an apparatus for intraocular lens selection. The apparatus may include a biometer and an autorefractor. The biometer may be configured to obtain at least two ocular measurement parameters for an eye. The autorefractor may be configured to obtain a post-operative refraction of the eye. The apparatus may also include a user interface configured to obtain a lens selection parameter for the eye, a memory, and a processor communicatively coupled to the biometer, the user interface, the autorefractor, and the memory. The processor may be configured to determine an intraocular lens power based on a formula using the at least two ocular measurement parameters. The processor may be configured to correlate the at least two ocular measurement parameters, the intraocular lens power, and the post-operative refraction as a training set.

The invention relates to a method for collecting biometric measurement data of an eye based on different measurement modes, which method enables physiologically correct, representative and robust biometric measurement data. In the method according to the invention, the measurement data of the individual measurement variables are recorded continuously during the measurement time with as high a repetition rate as possible, and the dynamic behavior of the eye is also recorded with as high a repetition rate as possible. The individual phases of the eye dynamics are analyzed from the measurement values, the limits for the stable vision phase are defined, and only the measurement data of the individual measurement variables detected during the stable vision phase are output. Although the proposed method is particularly used for collecting biometric measurement data of an eye in the preparation of cataract surgery, the method can also be used in other fields of ophthalmology to produce error-free eye measurement data or recordings.

The application relates to an intraocular pressure measuring device and system, comprising a wearing assembly; a mounting shell movably arranged on the wearing assembly; a pressure measuring assembly detachably mounted in the mounting shell, the pressure measuring assembly comprising a pressure sensing piece, a displacement sensing piece, a contact piece, a barrel and a driving piece, the driving piece, the pressure sensing piece and the displacement sensing piece being mounted in the barrel, and the pressure sensing piece being connected with the contact piece; the contact piece is used for contacting and applying pressure to the eye of a subject, the pressure sensing piece is used for monitoring pressure information of the surface of the eye, and the displacement sensing piece is used for measuring the moving distance of the pressure sensing piece. The contact piece in the pressure measuring assembly acts on the eye of the subject, closed-eye measurement is realized, the discomfort of the subject in the measurement process is reduced, and corneal damage and stress reaction are avoided, and the application is especially suitable for children or corneal patients.