Embodiments of the invention include a method to determine a binocular alignment, the method comprising: measuring a disassociated phoria of a first eye and a second eye of a patient at an apparent distance; and determining an accommodative convergence of the first eye and the second eye at the apparent distance using the measured disassociated phoria. In other embodiments, a system to determine a binocular alignment comprises a stereo display, for a projection of images for a first eye and a second eye; an accommodation optics, to modify the projection of the images according to an apparent distance; an eye tracker, to track an orientation of the first eye and the second eye; and a computer, coupled to the stereo display, the accommodation optics and the eye tracker, to manage a determination of the binocular alignment.

Methods, systems and devices for determining contrast sensitivity function in a subject without requiring perceptual report by the subject.

A system is provided for determining a risk indicator for myopia. The system comprises a wearable device configured to be attached to a body of a user. The wearable device comprises at least one distance sensor configured to determine at least a first distance value indicative of a distance between the wearable device and an object located in a central vision zone of the user and a second distance value indicative of a distance between the wearable device and an object located in a peripheral vision zone of the user. The system further comprises a control unit configured to determine, based on the first distance value and the second distance value, a risk indicator for myopia. Further, a method and a computer program product are provided.

A virtual reality game- and biosignal sensor-based VOR assessment and rehabilitation apparatus includes: a biosignal sensing unit which senses and notifies of head movement and eye movement of a patient using an eye tracker and an inertial measurement unit (IMU) sensor attached or installed to a head-mounted display device; a VOR function assessment unit which configures and provides a game for VOR function assessment; a patient-personalization control unit which determines, on the basis of the VOR gain of the patient, the types and order of rehabilitation games, and a rehabilitation level; and a rehabilitation game providing unit which configures and provides games for at least one among smooth pursuit, saccades, VOR rehabilitation exercise, amplified VOR rehabilitation exercise, and suppressive VOR rehabilitation exercise, and determines the difficulty levels of the games on the basis of the rehabilitation level.

Provided is an information processing device including an arithmetic processing unit that executes arithmetic processing related to calibration of detection of a sight line toward a display unit. The arithmetic processing unit determines calibration executability for each of both eyes based on acquired sight line data and uses only the sight line data of an eye for which calibration is determined to be executable when executing calibration for the eye.

Retinal imaging systems and methods are described. In an embodiment, the retinal imaging system includes an eyepiece lens assembly; an image sensor adapted to acquire a retinal image of an eye through the eyepiece lens assembly; a dynamic fixation target optically coupled to the eyepiece lens assembly such that the dynamic fixation target is viewable through the eyepiece lens assembly; and a controller communicatively coupled to the image sensor and the dynamic fixation target. In an embodiment, the dynamic fixation target includes a display where an image generated by the display is controlled by a position of a user's eye relative to the eyepiece lens assembly.

An eye-gaze detecting device includes an image data acquisition unit configured to acquire image data of an eyeball of a test subject irradiated with detection light; a position detection unit configured to detect, from the image data, position data of pupil center of the eyeball and position data of corneal reflection center; a pupil diameter calculation unit configured to calculate a pupil diameter of the test subject from the image data; a curvature center calculation unit configured to calculate a corneal curvature radius corresponding to the pupil diameter, and obtain position data of corneal curvature center based on the position data of the corneal reflection center and the corneal curvature radius; and a point-of-gaze detection unit configured to calculate, based on the position data of the pupil center and corneal curvature center, position data of point of gaze of the test subject on a plane including a display unit.

A retinal camera system comprises an eyepiece lens disposed within a housing, a retinal image sensor, and a visual guidance indicator. The retinal image sensor is adapted to acquire a retinal image of an eye through the eyepiece lens. The visual guidance indicator is disposed in or on the housing peripherally about the eyepiece lens. The visual guidance indicator is positioned and oriented relative to the eyepiece lens to emit a visual cue along an optical path that does not pass through the eyepiece lens. The visual cue is adapted to facilitate alignment of the eye to the eyepiece lens.

An ophthalmologic apparatus includes: an optical system configured to acquire data of a subject's eye; a housing unit configured to house the optical system; and an attachment member including a holding member configured to hold a face of the subject movably in a state where a peripheral site of the subject's eye is in contact with the holding member, a passing part through which an optical axis of the optical system passes being formed in the holding member, and the attachment member configured to be detachable between the housing unit and the subject's eye.

Provided is a wearable fundus camera configured to be worn as a headset by a human, the wearable fundus camera comprising: an infrared light source configured to output infrared light to be directed at a retina of the human; an image sensor configured to capture infrared images depicting a retina of an eye of the human under illumination from the infrared light source without a pupil of the eye being dilated with mydriatics; and an eye cuff configured to be biased against a face of the human and occlude at least some ambient light from reaching the image sensor.