Abstract: An OCT device includes a controller configured to: acquire OCT data of a tissue of a subject in a depth direction that is generated by processing interference signal detected by a light receiving element; and perform a correction process to reduce an effect by a noise floor in the OCT data using a plurality of correction amounts each of which is set in accordance with depth at a corresponding data acquisition position. Strength of the noise floor varies depending on the depth of the data acquisition position.

Abstract: A system may include a headset device comprising a display screen and an adaptive map perimetry algorithm that is configured to access or implement a normative database or model. The system may implement a VF test adapted to fit an area of the display screen based on values in the normative database or model and is rendered as a same or similar visualization compared to one or more different headset devices having different display screens having different respective shapes, formats, sizes, and/or resolutions. The system may receive visual test data indicating a visual field of the user and detect one or more initial test locations. The one or more initial test locations define one or more healthy clusters indicative of an absence of scatoma and one or more damaged clusters indicative of scotoma. The system may generate a spatial mapping identifying locations of the one or more damaged clusters.

Abstract: The present invention discloses a rotating shaft structure for virtual reality (VR) or augmented reality (AR) glasses, and glasses. The rotating shaft structure includes a first housing, a second housing, an annular frame, an elastic body, and a rotating shaft. The first housing has a guide groove, and the guide groove includes two retaining walls and a recess located between the retaining walls. The second housing is relatively rotatably fitted with the first housing, and at least part of the second housing is located within the first housing. The annular frame is rotatably arranged in the first housing, is engaged with the second housing, and has a positioning post extending toward the guide groove. Two ends of the elastic body are respectively connected to the first housing and the annular frame. The rotating shaft extends through the first housing, the elastic body, and the annular frame.

Abstract: An electrochromic (EC) device includes a substrate and a plurality of layers formed on the substrate. The plurality of layers includes an active layer that is lithiated for changing a tint of the EC device. The active layer is lithiated using a deposition process that uses one or more lithium (Li) targets. The deposition process provides, on no more than 1.5% of manufactured EC devices, a Li tungsten-oxide deposit area on the substrate that is over-concentrated with Li relative to a surrounding area on the substrate. In some aspects, the EC device may be a component of an EC system that further includes a power supply electrically connected to the EC device and configured to provide a voltage to the EC device for controlling a tint of the EC device.

Abstract: The present embodiment relates to a camera device comprising: an image sensor; a reflective member; a lens; and a reflective member driving device, wherein the reflective member driving device includes a holder being coupled to the reflective member and a driving magnet being disposed in the holder, wherein the holder of the reflective member driving device includes a first surface, and second and third surfaces being disposed on both sides of the first surface, wherein the driving magnet includes a first driving magnet being disposed on a first surface of the holder and a second driving magnet being disposed on at least one of the second and third surfaces of the holder, wherein the second driving magnet includes a first surface facing a lens driving device, and wherein a yoke is disposed on the first surface of the driving magnet.

Abstract: An ophthalmic device may include: a measurement optical system which includes a light-emitting optical system including a light source and a light-receiving optical system including a light receiving element; an arithmetic device configured to calculate an eye refractive power of the subject eye; a beam deflecting member arranged in an optical path of the measurement optical system and configured to deflect beam emitted from the light source, and a driving device configured to drive the beam deflecting member so that the beam emitted from the light source is scanned in a ring shape onto the subject eye. The beam deflecting member may be disposed so that traveling directions of the beam emitted from the light source intersect with each other between the subject eye and the beam deflecting member when the beam deflecting member is driven by the driving device.

Abstract: An ophthalmic instrument including a light emitter, an optical system, and a control section. The light emitter includes a light source including at least one out of a first light source unit or a second light source unit that emits light for examining a subject eye. The light emitter is configured to emit light from the light source. The optical system guides light emitted from the light emitter onto a right-eye retina and/or onto a left-eye retina. The control section is configured to control the light emitter and the optical system such that the light is shone onto the right-eye retina and/or onto the left-eye retina.

Abstract: A microscope objective lens (OL) includes a first lens group (G1) and a second lens group (G2) arranged in order from the object side. The first lens group has positive refractive power and converts luminous flux from an object into convergent luminous flux. The second lens group has negative refractive power and converts the convergent luminous flux from the first lens group into parallel luminous flux. The microscope objective lens satisfies the following conditional expression: 14.0?NA×f 1.0<H1/H0 where NA is the numerical aperture of the microscope objective lens; f is the focal distance of the microscope objective lens; H1 is the maximum value of the height of marginal rays from an on-axis object point of the first lens group; and H0 is the height of marginal rays on the lens surface closest to the image side of the second lens group.

Abstract: The present disclosure provides for an ophthalmic testing system that may prescreen for ophthalmic diseases and systemic diseases. In some embodiments, an OTS may provide general screening results and relatives scores to patients that may be at risk for diabetic retinopathy, macular degeneration, or Alzheimer's. In some implementations, the OTS may offer self-screening features without collecting personal information that may identify the individual. In some embodiments, the OTS may use artificial intelligence and machine learning and machine learning to provide accurate and instant analysis and results to a user.

Abstract: According to an aspect of the present invention, a lens barrel includes a first lens holding frame, a second lens holding frame, and a sheet member configured to be sandwiched between the first lens holding frame and the second lens holding frame, wherein the second lens holding frame is provided with at least two first nip portions, wherein the first lens holding frame is provided with at least two second nip portions, wherein the sheet member is provided with first sheet portions and second sheet portions, and wherein radial widths of the second sheet portions are smaller than radial widths of the first sheet portions.

Abstract: A system for determining a value of a magnitude associated with a subjective value of an optical feature of at least a corrective lens adapted to an eye of a subject, by implementing a subjective test where the subject is asked to describe his visual performance in a plurality of real optical conditions by choosing one descriptive answer among a set of possible descriptive answers. The system includes one or more processor programmed to collect the results of the subjective test, performed by asking the subject to describe his visual performance in each real optical condition of the plurality of real optical conditions by choosing, for each real optical condition, one descriptive answer, the results comprising each descriptive answer chosen and the corresponding real optical condition, and determine the value of the magnitude by taking into account the initial model and each descriptive answer collected.

Abstract: A system may include a headset device and an average hill of vision model (HoV) and may generate an eye difference estimate relative to reference data for an average healthy eye obtained from a normative dataset. The eye difference estimate indicates a difference in overall sensitivity or general height and the rate of sensitivity decay with eccentricity relative to the reference data. The system may generate an individualized HoV model based on the eye difference estimate and the average HoV model, display, on the headset device, a respective stimulus at a plurality of test locations, store responses to the stimulus, and analyze the responses to determine a respective sensitivity value at each of the plurality of test locations. The system may determine total-deviation values by subtracting the respective sensitivity value from a corresponding value of the individualized HoV model, analyze the total-deviation values, and provide feedback based on the analysis.

Abstract: A control circuit controls at least one optical path difference among optical path differences of two optical paths included in a single MZI or each of a plurality of the MZIs included in an optical circuit. The control circuit includes a reference light generation unit, a reference light input unit, an optical power monitor unit, and a controller. The reference light generation unit generates reference light respectively having N types (N is a natural number) of wavelengths different from the wavelength ? of input light input to the optical circuit in parallel or in a time division manner. A reference light input unit inputs the reference light to the optical circuit.

Abstract: To provide a fundus information acquisition method that allows observation and photography to be conducted using an optical system of a simple and easy configuration without the need for accurate alignment of the imaging unit with a test eye even when there is a distance from the test eye. A fundus information acquisition method is provided with an infinity-corrected optical system that uses an imaging unit placed opposite an objective lens that causes light passing through the objective lens to form an image as part of a fundus image of a test eye, where at least a site defined by a range of a pupil of the test eye out of a cornea and a crystalline lens of the same test eye is used as the objective lens opposed to a fundus of the test eye.

Abstract: An optical system includes a first lens group including at least one lens, and a second lens group including at least one lens, wherein the first lens group and the second lens group are disposed in order from an object side, wherein each of the first lens group and the second lens group is configured to move in an optical axis direction to change a magnification between a wide-angle end and a telephoto end, and wherein G1F is a focal length of the first lens group, G2F is a focal length of the second lens group, and |G1F/G2F| has a value of between 0.5 and 1.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in ascending numerical order along an optical axis from an object side of the optical imaging system toward an imaging plane of an image sensor, wherein TTL/(2*IMG HT)?0.67 is satisfied, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane of the image sensor, and IMG HT is one half of a diagonal length of the imaging plane of the image sensor, and 15<v1-v3<45 is satisfied, where v1 is an Abbe number of the first lens, and v3 is an Abbe number of the third lens.

Abstract: This application provides an optical lens, a camera module, and an electronic device. The optical lens includes a first lens element group and a second lens element group. The first lens element group and the second lens element group each include a plurality of lens elements. In different use scenarios, the second lens element group can be moved to change a distance between the first lens element group and the second lens element group, to change a focal length of the optical lens. In this application, the second lens element group is disposed within a back focal length range of the first lens element group.

Abstract: An apparatus for recommending an optical device adapted to a wearer having a current optical device, the apparatus including processing circuitry that receives and stores measured data relating to features measured on the wearer using at least one measuring instrument, anamnesis data relating to the anamnesis of the wearer, and current optical device data relating to the current optical device used by the wearer, that processes at least two of the measured, anamnesis, and current optical device data based on predetermined processing rules, and that recommends an optical device for the wearer based on the data.

Abstract: A computer-implemented method of processing repeat B-scans of an imaged region of a body part, the imaged region including an anatomical feature in a first subregion and vasculature of interest in a second subregion of the imaged region, to generate cropped B-scans for use in generating OCT angiography data which provides a representation of the vasculature of interest, the method comprising processing each B-scan of the repeat B-scans by: selecting a subset of the data elements of the B-scan such that the selected data elements are distributed along a representation of the anatomical feature in the B-scan; using the selected data elements to define a respective subregion of interest in the B-scan, which includes OCT data acquired from the second subregion containing the vasculature of interest; and cropping the B-scan to leave the subregion of interest in the B-scan.

Abstract: An ophthalmic apparatus includes an illumination optical system, an optical scanner, an imaging optical system, a controller, and an image forming unit. The illumination optical system is configured to generate slit-shaped illumination light. The optical scanner is configured to deflect the illumination light to guide the illumination light to a fundus of a subject's eye. The imaging optical system is configured to guide returning light of the illumination light from the fundus to an image sensor. The controller is configured to control the optical scanner. The image forming unit is configured to form an image of the fundus based on a light receiving result captured in an imaging target region on a light receiving surface of the image sensor.