It is also helpful to meet the following vision requirements; close vision (clear vision at 20 inches or less), distance vision (clear vision at 20 feet or more), color vision (ability to identify and distinguish colors), peripheral vision (ability to observe an area that can be seen up and down or to the left and right while eyes are fixed on a given point), depth perception (three-dimensional vision, ability to judge distances and spatial relationships), and ability to adjust focus (ability to adjust the eye to bring an object into sharp focus). It is helpful to meet these physical demands to perform the essential functions of this job; vacuuming & brushing pools, moving lounge furniture, carrying towel bags, watching water, adding chemicals, and cleaning locker room, weight room and racquet ball courts.