Final answer:
Problems caused by staring and fatigue can lead to symptoms like difficulty concentrating, eye strain, fatigue, and headaches. Conditions like farsightedness and disruptions in circadian rhythms can contribute to these problems.
Step-by-step explanation:
Problems caused by staring and fatigue can lead to various symptoms, including difficulty concentrating, eye strain, fatigue, and headaches. These symptoms are commonly associated with conditions like farsightedness and disruptions in circadian rhythms. For example, farsightedness can result in difficulty maintaining a clear focus on close objects and aching or burning eyes, while disruptions in circadian rhythms, such as jet lag, can cause fatigue, sluggishness, and insomnia.