**2.3 Drone system to help exercise of the visually impaired for the University of Nevada**

The visually impaired people have limitations in some exercise, such as running outside without a guide, but it has been confirmed that the visually impaired have higher spatial localization skills than the general public. This study became the basis for the ability of the visually impaired people to follow drones in a running track environment. In fact, the University of Nevada, Reno (UNR), developed a drone system (**Figure 5**) that helps exercise of the visually impaired people through low-cost flying drones [15]. Equipped with a total of two cameras, a downward-facing camera that follows the track's line and a separate camera that focuses on the marker on the runner's shirt, the drone flies about 10 feet ahead of the runner running at eye level and provides sound guidance. As the runner speeds up or slows down, the drone adjusts its own speed to guide the movement of the visually impaired. The study was conducted with two visually impaired persons, and the results of the study confirmed that the visually impaired could accurately identify and follow the drone, and the qualitative results showed that the participants were accustomed to following the drone, and that the drone system had high efficiency when following and locating the drone.
