Google patents VR headset for automated color vision tests

1. A system comprising: a VR headset comprising a left visible light display, a left compartment to fit over a left eye of a user, a right visible light display, a right compartment to fit over a right eye of the user, wherein the left and right compartments are configured so that when the headset has been fitted over the user's eyes a) the user cannot see the right display using only their left eye and b) the user cannot see the left display using only their right eye, and a non-visible light-based eye tracking subsystem that produces tracking data for the left eye and for the right eye, wherein the left and right compartments are opaque and configured to block ambient light originating external to the left and right compartments to create a light-controlled environment around the user's eyes; and a processor configured to, when the headset has been fitted over the user's eyes: i) signal the left or right visible light display to display i) a pseudo isochromatic plate, PIP, for a color vision test, and simultaneously ii) a plurality of user selectable figures; ii) use the tracking data from the eye tracking subsystem to record a tracked position of the right eye or a tracked position of the left eye as the right eye or the left eye moves while the PIP is being shown in i); iii) interpret the tracked position of the right eye or the left eye to determine a user selectable figure that has been selected by the user from amongst the plurality of user selectable figures; and iv) record an indication as to whether the user has seen a stimulus figure in the PIP, based on a comparison between the stimulus figure and user selectable figure.