The worker is required to have visual acuity to perform an activity such as: operating machines such as lathes, drill presses, power saws and mills where the seeing job is at or within arm’s reach; performing mechanical or skilled trades tasks of a non-repetitive nature such as ones by carpenters, technicians, service people, plumbers, painters, mechanics, etc. The worker is subject to hazards: Includes a variety of physical conditions, such as proximity to moving mechanical parts, moving vehicles, electrical current, working on scaffolding and high places, exposure to high heat or exposure to chemicals.