Patent ID: 11874530
Assignee: APPLE INC.
Field: Optics (Instruments)
Classification: CPC G  A | IPC A  G

Claim 21:
22. A head-mounted device, comprising:
a display configured to display images;
a lens;
a sensor that includes a light source configured to produce light, a waveguide configured to receive the light produced by the light source via an input coupler, and an output coupler configured to couple the received light out of the waveguide towards an eye position, wherein the display and the output coupler overlap the eye position in a same direction in front of the eye position; and
control circuitry configured to measure refractive errors in eyes with the sensor based on the light coupled out of the waveguide and configured to adjust at least one of: the lens and a position of the display based on the measured refractive errors.