Factors Affecting Patient/ Safety: Accurate sensory perception of environmental stimuli is viral to safety. People with impaired touch perception, hearing ,taste, smell, and vision are highly susceptible to injury. A client with impaired virion may trip over a toy or not see an electric cord. A client with impaired hearing may not hear a siren in traffic. A client with impaired olfactory sense may not smell burning food or the sulfur aroma of escaping gas.