Systems and methods for visual field testing in head-mounted displays

Inventors

Abou Shousha, Mohamed • Kashem, Rashed

Abstract

A method is disclosed for improving accuracy of visual field testing in head-mounted displays. The method includes retrieving a visual field testing pattern for a head-mounted display, the visual field testing pattern including icons displayed at respective locations in a visual field of the head-mounted display. The visual field testing pattern is generated on the head-mounted display. Data is retrieved from a tilt sensor, located at the head-mounted display, for detecting degrees of head tilt of a user wearing the head-mounted display and the degree of head tilt is determined. A comparison is made between the degree of head tilt of the user to a first threshold degree. In response to the degree of head tilt of the user meeting or exceeding the first threshold degree, a recommendation to the user is generated for display on the head-mounted display.

Core Innovation

The disclosure provides methods and systems for improving accuracy of visual field testing in head-mounted displays. A visual field testing pattern for a head-mounted display is retrieved and includes a plurality of stimuli displayed at respective locations of the head-mounted display, and the pattern is generated for display on the head-mounted display. The system determines, via one or more sensors located at the head-mounted display, a degree of head tilt of the user.

The degree of head tilt of the user is compared to a first threshold degree, and in response to the degree of head tilt of the user satisfying the first threshold degree, a recommendation to the user is generated for display on the head-mounted display. The recommendation is related to reducing the degree of head tilt of the user, and the recommendation indication is described as guiding the user to reduce the degree of head tilt. The disclosure further describes generating a representation depicting an amount of the degree of head tilt.

The disclosure also describes using head-tilt determination to adjust stimulus placement when the head-tilt degree satisfies a second threshold degree. In this case, an automatic adjustment of a location of one of the plurality of stimuli can be performed without displaying the reducing-tilt recommendation, followed by generating the recommendation after the head tilt satisfies the first threshold degree at a later time. Additionally, the disclosure describes defining stimulus locations using first and second directional components adjusted by cosine and sine of the degree of head tilt, and mapping stimulus locations arranged in a row to projections from a curved surface to a flat surface corresponding to different viewing angles, including geometric relationships involving offset distance and an angle.

Claims Coverage

The independent claims are directed to three inventive features centered on head-tilt-aware visual field testing in a head-mounted display.

The independent claims consistently require retrieving and generating display of a visual field testing pattern on a head-mounted display, determining a user's degree of head tilt using head-mounted sensors, comparing that degree to a first threshold degree, and generating a recommendation or recommendation indication on the head-mounted display when the first threshold degree is satisfied. Dependent claim refinements additionally include an automatic stimulus-location adjustment based on a second threshold and stimulus placement using cosine and sine components and curved-surface-to-flat-surface projection geometry.

Stated Advantages

Documented Applications