In one implementation, a method includes: synthesizing an AR/VR content stream by embedding a plurality of glints provided for eye tracking into one or more content frames of the AR/VR content stream; displaying, via the one or more AR/VR displays, the AR/VR content stream to a user of the HMD; obtaining, via the image sensor, light intensity data corresponding to the one or more content frames of the AR/VR content stream that include the plurality of glints, wherein the light intensity data includes a projection of an eye of the user of the HMD having projected thereon the plurality of glints; and determining an orientation of the eye of the user of the HMD based on the light intensity data.