Visual acuity measurement in VR headset
AssigneeVerily Health Inc.
InventorsSupriyo Sinha, Nick Leindecker, Jeremy Chan, Dimitri Azar
Life of this patent
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Abstract
A headset includes a first display, a second display that is smaller than the first display and has lower resolution than the first display, and a dichroic filter positioned to pass visible light from the first display toward the eye and reflect visible light from the second display toward the eye. Pixel data control circuitry is coupled to darken the first display while simultaneously activating the second display to display a pattern for testing visual acuity, responsive to a first visual acuity test selection. Other aspects are also described and claimed.
Claims20
A system for measuring visual acuity, the system comprising:
- an eye tracker camera;
- an illumination source to produce near infrared, NIR, light that illuminates an eye of a user of the system;
- a first display;
- a first dichroic filter positioned to pass visible light from the first display to the eye, and reflect NIR light that has been reflected from the eye;
- a second display;
- and
- a second dichroic filter, wherein the second dichroic filter is one of:
- i) a first version that is positioned to pass the reflected NIR light from the first dichroic filter to the eye tracker camera, and reflect visible light from the second display to the first dichroic filter;
- or
- ii) a second version that is positioned to reflect the reflected NIR light from the first dichroic filter toward the eye tracker camera, and pass visible light from the second display to the first dichroic filter.
A system for measuring visual acuity, the system comprising:
- a first display;
- a second display that is smaller than the first display and has lower full frame pixel resolution than the first display;
- a dichroic filter positioned to pass visible light from the first display toward an eye and reflect visible light from the second display toward the eye, wherein the dichroic filter is adapted to pass a majority of the visible light incident from the first display while reflecting a minority of the visible light incident from the second display that has the lower full frame pixel resolution;
- and
- pixel data control circuitry coupled to darken the first display while simultaneously activating the second display to display a pattern for testing visual acuity, responsive to a first visual acuity test selection.
Dependencies are inferred from the claim text.