System, method, and head-mounted device for visual field testing

An apparatus for administering a Conventional Gold Standard visual field test defined to determine sensitivity of a patient's visual system at various locations eccentric to the central fixation point in order to create a map of the patient's visual field comprising:

• a visual field test unit configured to receive a face of the patient and to perform the visual field test on the patient, wherein the visual field test unit includes:
• a light stimulus device configured to generate a light stimulus to an eye of the patient;
• wherein the light stimulus device comprises an array of light-emitting devices configured to transmit light and at least one opaque screen in front of the array of light-emitting devices;
• wherein said at least one opaque screen defines an array of openings at positions registered with respective ones of the light emitting devices in the array to permit passage of light from each light-emitting device through its respective opening and to block light from others of the array of light-emitting devices;
• wherein the light emitting devices of the array are located at specific coordinates of the visual field which coordinates are determined by the Conventional Gold Standard visual field test;
• wherein the patient indicates recognition of the stimuli by a response and the test report presents a visual grid which maps the lowest intensity level of light stimulus recognized by the patient at each coordinate of the visual field tested;
• wherein the optical assembly comprises a plurality of focusing lenses arranged to focus light emanating from the light stimulus device along a line of sight and onto the patient's eye;
• wherein the light stimulus device has a level of intensity and the optical assembly has a level of attenuation caused by the optical assembly which are together arranged such that the light stimulus reaching the eye is at least about 3,200 Nts.

An apparatus for administering a Conventional Gold Standard visual field test defined to determine sensitivity of a patient's visual system at various locations eccentric to the central fixation point in order to create a map of the patient's visual field comprising:

• a visual test unit configured to receive a face of the patient and to perform the visual field test on the patient, wherein the visual test unit includes:
• a light stimulus device configured to generate a light stimulus to an eye of the patient;
• wherein the light stimulus device comprises an array of light-emitting devices configured to transmit light and at least one opaque screen in front of the array of light-emitting devices;
• wherein said at least one opaque screen defines an array of openings at positions registered with respective ones of the light emitting devices in the array to permit passage of light from each light-emitting device through its respective opening and to block light from others of the array of light-emitting devices;
• wherein the light emitting devices of the array are located at specific coordinates of the visual field which coordinates are determined by the Conventional Gold Standard visual field test;
• wherein the patient indicates recognition of the stimuli by a response and the test report presents a visual grid which maps the lowest intensity level of light stimulus recognized by the patient at each coordinate of the visual field tested;
• wherein the optical assembly comprises a plurality of focusing lenses arranged to focus light emanating from the light stimulus device along a line of sight and onto the patient's eye;
• wherein the light stimulus device has a level of intensity and the optical assembly has a level of attenuation caused by the optical assembly which are together arranged such that the light stimulus reaching the eye is at least about 3,200 Nts;
• wherein the optical assembly is arranged such that there is a second focusing lens closest to the eye of the patient, a hot mirror and then a first focusing lens, followed by said at least one opaque filter and the array of light emitting devices;
• wherein the second focusing lens adjacent to the eye of the patient is biconvex and wherein a side of the second focusing lens closest to the eye has a larger radius of curvature than the radius of curvature of an opposite side of the second focusing lens;
• wherein the first focusing lens closest to the light stimulus device is biconcave and wherein a side of the first second focusing lens closest to the eye of the patient has a smaller radius of curvature than the radius of curvature of the side of the first focusing lens closest to the light stimulus device;
• wherein the hot mirror situated between the first and second focusing lenses is configured to transmit light emanating from the array of light emitting devices having frequencies within the first frequency range and to reflect light in a second frequency range such that a camera provides a video of the eye of the patient;
• wherein the optical assembly is configured to permit the patient to see all of the light stimuli presented within the visual field of the patient;
• wherein the camera is aligned at an angle to the side of the mirror closest to the eye of the patient.

An apparatus for administering a Conventional Gold Standard visual field test defined to determine sensitivity of a patient's visual system at various locations eccentric to the central fixation point in order to create a map of the patient's visual field comprising:

• a visual test unit configured to receive a face of the patient and to perform the visual field test on the patient, wherein the visual field test unit includes:
• a light stimulus device configured to generate a light stimulus to an eye of the patient;
• a camera configured to track movement of the eye of the patient;
• wherein the visual field test unit comprises a head mounted unit having a housing configured for mounting to the head of the patient;
• wherein the housing carries an internal test display and the camera;
• wherein the camera is configured to track the eye of the patient by light rays reflected therefrom;
• wherein the head mounted unit includes an optical assembly in the housing and configured for transmitting the light stimulus from the light stimulus device to the eye and light emanating from the eye of the patient to the camera;
• wherein the optical assembly comprises a plurality of focusing lenses arranged to focus light emanating from the light stimulus device along a line of sight and onto the patient's eye;
• wherein the light stimulus device has a level of intensity and the optical assembly has a level of attenuation caused by the optical assembly which are together arranged such that the light stimulus reaching the eye is at least about 3,200 Nts;
• wherein the camera is located at a position off the line of sight;
• wherein the optical assembly comprises a hot mirror arranged in the line of sight;
• the hot mirror being arranged to transmit light emanating from the light stimulus device along the line of sight and onto the patient's eye;
• the hot mirror being arranged to reflect light from the eye onto the camera;
• wherein the plurality of focusing lenses on the line of sight includes a first focusing lens disposed along the line of sight adjacent the light stimulus device;
• wherein the plurality of focusing lenses includes a second focusing lens disposed along the line of sight and adjacent the eye;
• wherein the first and second focusing lenses are the only lenses of the optical assembly;
• wherein the hot mirror is located between the first and second focusing lenses;
• wherein the second focusing lens adjacent to the eye of the patient is biconvex and wherein a side of the second focusing lens closest to the eye has a larger radius of curvature than the radius of curvature of an opposite side of the second focusing lens;
• wherein the first focusing lens closest to the light stimulus device is biconcave and wherein a side of the first focusing lens closest to the eye of the patient has a smaller radius of curvature than the radius of curvature of the side of the second focusing lens closest to the light stimulus device;
• wherein the light stimulus device forms an array of light emitting devices located at specific coordinates of the visual field which coordinates are determined by the Conventional Gold Standard visual field test;
• wherein the patient indicates recognition of the stimuli by a response and the test report presents a visual grid which maps the lowest intensity level of light stimulus recognized by the patient at each coordinate of the visual field tested.