A method (800; 1100) of characterizing an eye orientation, the method comprising: providing a light scanning projector (101; 620), an eyepiece (100; 400; 500; 620; 920; 1220) mounted in a frame, and one or more optical detectors (220; 932; 1232; 1252a, 1252b) positioned around a periphery of the frame; projecting (710; 1110) a first image frame including a first plurality of pixels using the light scanning projector and the eyepiece, wherein each of the first plurality of pixels is associated with a pixel position within the first image frame; detecting (816; 1112) one or more time-varying reflected signals using the one or more optical detectors (220; 932; 1232; 1252a, 1252b), wherein each of the one or more time-varying reflected signals is associated with the first plurality of pixels of the first image frame and includes a series of first reflected intensities; correlating the first reflected intensities in the series of first reflected intensities of each of the one or more time-varying reflected signals with the pixel position of each of the first plurality of pixels to form a first spatial map between the pixel position of each of the first plurality of pixels and the first reflected intensities in the series of first reflected intensities of each of the one or more time-varying reflected signals; determining (820; 1114) a first eye orientation; projecting (822; 1116) a second image frame including a second plurality of pixels to the eye using the light scanning projector and the eyepiece, wherein each of the second plurality of pixels is associated with a pixel position within the second image frame; detecting (828; 1118) a second set of one or more time-varying reflected signals using the one or more optical detectors (220; 932; 1232; 1252a, 1252b), wherein each of the second set of one or more time-varying reflected signals is associated with the second plurality of pixels of the second image frame and includes a series of second reflected intensities; correlating the second reflected intensities in the series of second reflected intensities of each of the second set of one or more time-varying reflected signals with the pixel position of each of the second plurality of pixels to form a second spatial map between the pixel position of each of the second plurality of pixels and the second reflected intensities in the series of second reflected intensities of each of the second set of one or more time-varying reflected signals; and determining (832; 1120) a second eye orientation. providing a light scanning projector (101; 620), an eyepiece (100; 400; 500; 620; 920; 1220) mounted in a frame, and one or more optical detectors (220; 932; 1232; 1252a, 1252b) positioned around a periphery of the frame; projecting (710; 1110) a first image frame including a first plurality of pixels using the light scanning projector and the eyepiece, wherein each of the first plurality of pixels is associated with a pixel position within the first image frame; detecting (816; 1112) one or more time-varying reflected signals using the one or more optical detectors (220; 932; 1232; 1252a, 1252b), wherein each of the one or more time-varying reflected signals is associated with the first plurality of pixels of the first image frame and includes a series of first reflected intensities; correlating the first reflected intensities in the series of first reflected intensities of each of the one or more time-varying reflected signals with the pixel position of each of the first plurality of pixels to form a first spatial map between the pixel position of each of the first plurality of pixels and the first reflected intensities in the series of first reflected intensities of each of the one or more time-varying reflected signals; determining (820; 1114) a first eye orientation; projecting (822; 1116) a second image frame including a second plurality of pixels to the eye using the light scanning projector and the eyepiece, wherein each of the second plurality of pixels is associated with a pixel position within the second image frame; detecting (828; 1118) a second set of one or more time-varying reflected signals using the one or more optical detectors (220; 932; 1232; 1252a, 1252b), wherein each of the second set of one or more time-varying reflected signals is associated with the second plurality of pixels of the second image frame and includes a series of second reflected intensities; correlating the second reflected intensities in the series of second reflected intensities of each of the second set of one or more time-varying reflected signals with the pixel position of each of the second plurality of pixels to form a second spatial map between the pixel position of each of the second plurality of pixels and the second reflected intensities in the series of second reflected intensities of each of the second set of one or more time-varying reflected signals; and determining (832; 1120) a second eye orientation.