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: Apparatuses, systems and methods for providing improved ophthalmic lenses, particularly intraocular lenses (IOLs), include features for reducing dysphotopsia effects, such as straylight, haloes and glare, in diffractive lenses. Exemplary ophthalmic lenses can include a diffractive profile that distributes light among a near focal length, a far focal length, and one or more intermediate focal length. The diffractive profile provides for minimized or zero step heights between one or more pairs of diffractive zones for reducing visual artifacts.

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: A system and method of detecting eye movements of a subject for the diagnosis of neurological disorders. The method includes tracking eye movements of the subject, identifying microsaccades from the tracked eye movements, and characterizing microsaccade dynamics of the identified microsaccades to determine one or more parameters, such as microsaccade direction, microsaccade velocity, microsaccade magnitude, microsaccadic peak velocity-magnitude relationship, microsaccade duration, and intersaccadic intervals. The method also includes comparing the one or more determined parameters with a corresponding control parameter, assessing the comparison to determine differences between the one or more determined parameters and the corresponding control parameters, and generating a report including the diagnosis of neurological disorder based on the assessment.

Abstract: The purpose of the present invention is to provide a gaze detector with which it is possible to detect a gaze (start point and gaze direction) by a simple configuration. The gaze detector detects a person's gaze, wherein the gaze detector is provided with a camera unit 10 for imaging the face of the person, a projector unit 20 for projecting a prescribed pattern light to the face of the person, a control unit 30 for controlling the presence of projection of the pattern light by the camera unit 10 and the projector unit 20, and a gaze detection processing unit 40 for detecting a gaze from the image of the face of the person imaged by the camera unit.

Abstract: The present invention relates to new phosphaviologen derivatives, methods of making phosphaviologen derivatives, and uses thereof, including uses in electrochromic devices and organic battery materials. The phosphaviologen derivatives described herein have strong electron-accepting properties and can be used to provide phosphaviologen derivative-containing electronic materials. In certain embodiments, the phosphaviologen derivatives include dimeric phosphaviologens.

Abstract: An ophthalmic apparatus of an embodiment example applies an OCT scan to an anterior segment and constructs an image from acquired data. Further, the ophthalmic apparatus analyzes the image to detect an artifact along an A-scan direction and moves an OCT optical system based on the artifact. Also, the ophthalmic apparatus analyzes the image to detect a corneal image and judges whether an intersection between the artifact and the corneal image is located within a predetermined area. In addition, the ophthalmic apparatus calculates an image quality evaluation value of the image, and controls the OCT optical system to perform an OCT scan of a predetermined pattern if the intersection is located within the area and the image quality evaluation value is equal to or greater than a predetermined threshold.

Abstract: Methods, systems, and devices are provided for measuring eye refraction without a lens, and more particularly, for measuring eye refraction with a mobile device application. An exemplary method includes measuring a distance between a patient and a mobile device, presenting to the patient one or more visual targets sized and shaped to represent perfect vision such as by using Vernier targets or grating targets, instructing the patient to indicate whether the patient can accurately read the visual targets and, if not, to move closer to the mobile device until the patient can accurately read the visual targets, calculating a vision prescription for the patient based on the visual targets and a final distance between the patient and the mobile device, and displaying the vision prescription for the patient.

Abstract: The present disclosure discloses an optical imaging lens assembly, sequentially from an object side to an image side along an optical axis, including: a first lens having refractive power, an object-side surface thereof is concave, and an image-side surface thereof is convex; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power, and an object-side surface thereof is concave; a sixth lens having positive refractive power; and a seventh lens having refractive power. A total effective focal length f of the optical imaging lens assembly and an effective focal length f3 of the third lens may satisfy f3/f>1.49.

Abstract: An optical imaging system includes a plurality of lenses disposed along an optical axis from an object side of the optical imaging system toward an imaging plane of the optical imaging system. The lenses are separated from each other by respective air gaps along the optical axis between the lenses. The lenses include a first lens closest to the object side of the optical imaging system. The conditional expressions 1.5 mm<Gmax, TL<12.0 mm, and 0.15<R1/f are satisfied, where Gmax is a maximum air gap along the optical axis among all of the air gaps, TL is a length of the optical imaging system along the optical axis from an object-side surface of the first lens to the imaging plane, R1 is a radius of curvature of the object-side surface of the first lens, and f is a focal length of the optical imaging system.

Abstract: Provided are ophthalmologic image processing method, including an acquisition step of acquiring OCT data of an eye to be examined based on a spectral interference signal output from an OCT optical system, a setting step of setting a depth region including an image position of a tissue as an extraction region for data on one-direction side from a zero delay position in the OCT data, and a display control step of extracting extracted OCT data corresponding to the extraction region from the OCT data and displaying the extracted OCT data in a display region set in advance on a monitor, and an OCT apparatus that executes the method.

Abstract: A reduction optical system (Gr) disposed on an image side of a main optical system is configured such that a composite focal length of the main optical system and the reduction optical system is shorter than a focal length of the main optical system. The reduction optical system has a positive refractive power, and includes a plurality of positive lenses and a plurality of negative lenses. The reduction optical system satisfies inequalities with respect to a lateral magnification of the reduction optical system disposed on the image side of the main optical system, a focal length of the reduction optical system, a focal length of a positive lens Gp1 included in the plurality of positive lenses, and a refractive index of the positive lens Gp1.

Abstract: A lens system for imaging includes, in order from the object side, a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with positive refractive power, a stop, and a fourth lens group with positive refractive power. The third lens group includes, closest to the image plane side, a cemented lens on the object side of the stop and whose image plane-side surface includes a concave surface on the object side. The fourth lens group includes, closest to the object side, a cemented lens on the image plane side of the stop and whose object-side surface includes a concave surface on the image plane side. A radius of curvature g3er of the object side concave surface and the radius of curvature g4fr of the image plane side concave surface satisfy the following condition: 2.5?|g4fr/g3er|?4.0.

Abstract: A lens moving apparatus including a housing; a bobbin disposed in the housing; a coil disposed on the bobbin; a magnet disposed on the housing to correspond to the coil; an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; and a damper coupled to the first elastic member and the housing.

Abstract: The present disclosure provides an improved method for photobleaching an eye of a subject. The disclosed method may be used in a number of psychophysical test methods, including, but not limited to, measurement of dark adaptation. The improved method for photobleaching involves at least one of the following improvements: (i) the use of a bleaching light emitting a particular wavelength of light or a tailored spectrum of wavelengths; (ii) restricting or otherwise spatially tailoring the region of the retina that is subject to photobleaching; and (iii) utilizing a bleaching light having an intensity that is at or below the intensity of ambient daylight. The present disclosure additionally provides a combination of a photobleaching light and an apparatus to administer a psychophysical test suitable for use in practicing the disclosed methods.

Abstract: An optical imaging lens includes a first lens element to a seventh lens element. The first lens element, the fifth lens element and the sixth lens element are made of plastic. The optical axis region of the image-side surface of the second lens element is convex, the optical axis region of the image-side surface of the third lens element is convex, the optical axis region of the object-side surface of the fourth lens element is convex and the optical axis region of the image-side surface of the seventh lens element is concave to satisfy (T5+G56+T6)/(G23+T3+G34+T4+G45)?1.200 by controlling the surface curvatures of each lens element to enlarge HFOV, to reduce the system length and to have good imaging quality.

Abstract: Described are various embodiments of a light field testing device, adjusted pixel rendering method and computer-readable medium therefor, and testing system and method using same. In one embodiment, a light field device, system or computer-implemented method is provided to dynamically adjust user perception, via a light field display, of at least one testing optotype in accordance with a vision-based test, while also providing test administrative guidance via the light field display.

Abstract: The disclosure discloses an optical imaging lens, wherein the optical imaging lens sequentially from an object side to an image side along an optical axis includes, a first lens having a focal power; a second lens having a focal power, with an object side surface being a convex surface, and an image side surface being a concave surface; a third lens having a focal power; a fourth lens having a focal power; a fifth lens having a focal power, with an object side surface being a concave surface; a sixth lens having a focal power; a seventh lens having a positive focal power; and an eighth lens having a negative focal power; wherein, a total effective focal length f of the optical imaging lens and a combined focal length f34 of the third lens and the fourth lens satisfy: 0<f/f34?0.6.

Abstract: The present invention provides an optical imaging lens. The optical imaging lens comprises eight lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may enlarge aperture stop and image height and sustain relative illumination.

Abstract: An image lens assembly includes five lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the fifth lens element includes at least one convex critical point in an off-axis region thereof.