Fig. 4

Schematic of General Eye Service Clinic: Patients were tracked with RFID and IR technologies as they moved through the clinic. The orange shapes designate the locations of the IR receivers and the green shapes designate the locations of the RFID readers. The blue box designates the location of the return bin. The blue “X” designates the location from which the investigator manually tracked patients. Four exam rooms were used for this trial, labeled 1 through 4 in red. The front desk where check-in and checkout took place is labeled. Waiting areas are labeled