Final answer:
In security work, it is vital to assess the distances of objects/people, be alert for safety hazards, and monitor any changes in the environment using one's sense of sight.
Step-by-step explanation:
When using your sense of sight during security work, there are several important considerations to keep in mind. Firstly, be mindful of the distances of objects or people relevant to your location, as this can impact response times and strategies. Secondly, always be on the lookout for hazards that could affect the safety of yourself or others. This includes recognizing potential dangers before they become issues and being familiar with common hazard signs. Lastly, a change to the pattern of the physical environment could indicate a security breach or other significant event. Therefore, constant vigilance for any changes or anomalies in the usual setting is crucial.