An evaluation device includes a display screen; a gaze point detection unit that detects a position of a gaze point of an examinee; an area setting unit that sets a specific area for a first indicator on the display screen; a determination unit that determines whether the gaze point is present in the specific area based on the position thereof; a display controller that displays a second indicator at a different position from the first indicator when determining that the gaze point is present in the specific area; a arithmetic unit that determines whether the examinee has recognized the second indicator; and an evaluation unit that evaluates a visual function of the examinee based on a determination result from the arithmetic unit. The display controller doesn't display the second indicator when determining that the gaze point isn't present in the specific area after the second indicator has been displayed.

The present disclosure is directed to an apparatus for an improved ultrasound eye scanning device wherein the size of the scan head is reduced significantly and the entire instrument can be placed on a desktop. The improved ultrasound eye scanning device also utilizes imaging goggles to enable better coupling between the patient and the instrument. The imaging goggles also allow both eyes of the patient to be scanned without the patient moving. Another innovation of the ultrasound imaging system according to the present disclosure is the use of the contralateral (opposite) eye for fixation and focusing during scanning.

An optical measurement system and apparatus for carrying out cataract diagnostics in an eye of a patient includes a Corneal Topography Subsystem, a wavefront aberrometer subsystem, and an eye structure imaging subsystem, wherein the subsystems have a shared optical axis, and each subsystem is operatively coupled to the others via a controller. The eye structure imaging subsystem is preferably a fourierdomain optical coherence tomographer, and more preferably, a swept source OCT.

Methods, apparatus, and systems for performing an ophthalmic diagnostic test are disclosed. In one aspect, a head-wearable device for administering an ophthalmic test to a subject can comprise a head-wearable frame for mounting the device onto the subject's head, and a light seal configured for coupling to the frame so as to isolate at least one eye of the subject from ambient light when the device is worn by the subject.

A mobile communication device-based corneal topography system includes an illumination system, an imaging system, a topography processor, an image sensor, and a mobile communication device. The illumination system is configured to generate an illumination pattern reflected off a cornea of a subject. The imaging system is coupled to an image sensor to capture an image of the reflected illumination pattern. A topography processor is coupled to the image sensor to process the image of the reflected illumination pattern. The mobile communications device includes a display, the mobile communications device is operatively coupled to the image sensor. The mobile communications device includes a mobile communications device (MCD) processor. A housing at least partially encloses one or more of the illumination system, the imaging system, or the topography processor.

A mobile communication device-based corneal topography system includes an illumination system, an imaging system, a topography processor, an image sensor, and a mobile communication device. The illumination system is configured to generate an illumination pattern reflected off a cornea of a subject. The imaging system is coupled to an image sensor to capture an image of the reflected illumination pattern. A topography processor is coupled to the image sensor to process the image of the reflected illumination pattern. The mobile communications device includes a display, the mobile communications device is operatively coupled to the image sensor. The mobile communications device includes a mobile communications device (MCD) processor. A housing at least partially encloses one or more of the illumination system, the imaging system, or the topography processor.

A field of vision assessment is performed by reported positional feedback of visual markers at an outer circumference of a subject's field of vision. An array of visual markers arranged in a grid is rendered near a peripheral vision limit of the subject. The visual markers are disposed at known locations relative to an origin of the field of vision of the subject. Based on reported visual markers, a mapping of the visual markers to the location denotes a point on a periphery of limit of the visual field. The mapped points define vertices of a polyhedron having edges denoted by the vertices and the origin. The volume of the resulting polyhedron correlates to the field of vision of the subject, since as the periphery of the field of vision increases, the computed volume also increases.

The present disclosure provides improved techniques for imaging and/or measuring a subject's eye. Various aspects of the present disclosure relate to relate to an imaging and/or measuring apparatus. Some aspects of the present disclosure relate to an imaging and/or measuring apparatus configured to capture an image and/or measurement of a subject's eye, the imaging and/or measuring apparatus comprising: a plurality of illumination optical components comprising a spatial filter; and an objective lens configured to transmit and/or receive light with a field of view of the subject's eye. Some aspects of the present disclosure relate to a method of imaging and/or measuring a subject's eye, the method comprising: generating an annular illumination profile; attenuating a portion of the illumination profile using a spatial filter; and transmitting the attenuated illumination profile to a subject's retina fundus using an objective lens.

The present disclosure generally relates to methods and apparatus for accurate identification of the visual axis of the eye. In one embodiment, a visual axis identification system includes a fixation light source, a camera, a processing system, and a multifocal lens. The patient focuses their gaze through the multifocal lens and onto a fixation light beam provided by the fixation light source. The passage of the fixation light beam through the multifocal lens creates two or more images on or near to the patient's retina. The multifocal lens and/or the patient's eye are then moved relative to each other while the patient continuously maintains their gaze on the fixation light beam. The patient's visual axis may be located by determining the location of the optical center of the multifocal trial lens relative to the patient's eye when the centers of the multiple images coincide on the retina.

An instrument head is provided for attachment to a plurality of instrument handles having different power profiles. The instrument head contains an illumination assembly including at least one LED as well as a drive circuit for detecting a power profile of an attached instrument handle and converting variable voltages received from the attached instrument handle to a constant current for powering the at least one LED based on the power profile. Accordingly, the instrument head enables use with a plurality of instrument handles, including those originally configured for use only with incandescent light sources.