FIGURE 1.

Panel A—The redrawn MRT used in electronic interfaces. Participants must determine which two of the four objects on the right are a rotated version of the exemplar on the left. Panel B—Example question for the HAT. The exemplar is located on the left followed by the correct match, mirrored incorrect match and incorrect match. Panel C—The head‐free eye‐tracker with an outfacing scene camera (indicated by red circle) at bridge of nose to collect field of view information, an inward (eye) facing camera and infrared (IR) light on adjustable arms, to record eye movements. Panel D—Gaze‐tracking software recording of subject's pupil under IR light and tracking target. Panel E—Eye tracking scene camera field of view recording of the HAT with pupillary position (indicated by red circle with green outline). Gaze tracking was measured in S (sighted) and SH (sighted with haptics) conditions of the HAT. Panels A and B are used with permission. ²²