摘要:
The invention relates to a computer program that when executed on a computer causes a system to execute a method, particularly a computer-implemented method for determining a plurality of functional ocular parameters, with the system comprising an optical system (3) with a display system (4) that is configured to independently project a visual stimulus to a left and a right eye of a test person, an eye-tracking system (5) configured to record a gaze direction (100) and a pupil size (102) of the left as well as the right eye, said computer (2) being configured to control the optical system (3) and to receive recorded data from the eye-tracking system (5), wherein an afferent pupillary defect (APD), particularly a relative afferent pupillary defect (RAPD) is determined from a first trial session consisting of a sequence of first kind of stimuli presented to the left and the right eye of the test person eyes with the display system (4), and wherein a visual field (400) is determined from a second trial session consisting of a sequence of second kind of stimuli presented to the left and the right eye of the test person with the display system (4), wherein from the first and/or the second trial session a strabismus is determined as well, by determining one or more strabismus angles.
摘要:
Described are various embodiments of a a vision-based testing device for digitally implementing a vision-based test for a uusseerr using both their left and right eye simultaneously. In one embodiment, the device comprises: left and right display portions comprising respective pixel arrays; corresponding light field shaping element (LFSE) arrays of light field shaping elements respectively disposed at a distance from said display portions so to at least partially govern respective left and right light fields projected on the user's left and right eye, respectively; and a digital data processor operable on pixel data for designated visual digital test content, to simultaneously render said designated visual digital test content in accordance with the vision-based test to be simultaneously perceived by the left and right eye, respectively, to be at a common virtual position so to invoke a natural binocular eye vergence response corresponding to said common virtual position.
摘要:
The invention relates to a phoropter (100) for testing an individual's eyes when observing a target, comprising: - two optical units (110, 120) for the two eyes of the individual, each having an entry on the target side, an exit aperture on the individual's side, and an optical system for providing different vision correction powers to the corresponding eye of the individual, - moving means adapted to adjust the relative position of the two optical units, - a partially reflecting mirror (27) situated between the optical units and the target, - an image acquiring device directed toward the partially reflecting mirror so as to acquire images of the eyes of the individual looking at the target through the two optical units, and - an image displaying device suitable to display the acquired images.
摘要:
Examples of assessing vergence capability of an individual are described. In an example, a first random dot stereogram is generated. The first random dot stereogram includes a first random arrangement of dots and a first sub-portion positioned against the first random dot stereogram. Thereafter, an input from an individual, identifying the position of the first sub-portion against the first random dot stereogram may be received. In response to receiving the input, a second random dot stereogram comprising a second sub-portion positioned against the second random dot stereogram, is generated. The second random dot stereogram comprises a second random arrangement which is different from the first random arrangement of dots in the preceding first random dot stereogram. In response to the second random dot stereogram, another input to identify position of the second sub-portion against the second random dot stereogram is received.
摘要:
The present disclosure is directed to systems and methods for measuring pupillary responses to visible light stimuli. An exemplary system provides a display and a camera on the same side of a device; the display provides a visible light stimulus to illuminate a user's face and cause a pupillary reflex. A visible light or infrared camera thereafter receives image data of the pupillary light reflex. In some examples, an ambient light sensor and infrared measurement systems allow for performing pupillary light reflex assessments in low lighting conditions.
摘要:
A system and method for stereo vision measurement are provided. A three- dimensional visual stimulus is generated. The visual stimulus is composed of a plurality of spatially filtered dot elements configured to isolate stereo function. The visual stimulus is then presented to a user via a display device and input data is received in response to the user viewing the visual stimulus as presented. A stereo performance of the user is then determined from the input data.
摘要:
Embodiments related to analyzing brain activity of a subject to identify signs associated with binocular rivalry. Sensed electrical activity of a subject's brain is received over a time period while the subject is exposed to a visual stimulus. The sensed electrical activity comprises a first frequency band associated with a first frequency of a first image presented to the subject's left eye, a second frequency band associated with a second frequency of a second image presented to the subject's right eye. A set of events in the time period is determined based on the frequency bands, wherein an event is associated with a change from a previous perceptual event to a new perceptual event. A metric for the subject is determined based on the set of events. The metric is analyzed to determine whether the subject exhibits signs associated with a condition that is associated with binocular rivalry.
摘要:
Sistema para medición integral de parámetros clínicos de la función visual que incluye una unidad de visualización (20) para representar una escena con un objeto 3D de características variables como la posición virtual y el volumen virtual del objeto 3D dentro de la escena; sensores de movimiento (60) para detectar la posición de la cabeza del usuario y distancia a la unidad de visualización (20); sensores de seguimiento (10) para detectar la posición de las pupilas del usuario y diámetro pupila; una interfaz (30) para la interacción del usuario sobre la escena; medios de procesamiento (42,44) para analizar la respuesta del usuario en función de los datos de los sensores (60,10) y de la interfaz (30) con la variación de las características del objeto 3D; y en función de la estimación de una pluralidad de parámetros clínicos de la función visual relativos a binocularidad, acomodación, motilidad ocular o visuopercepción.