Final answer:
Overuse of computers can result in health issues such as headaches, dry eyes, blurred vision, and musculoskeletal pain. Lack of movement during prolonged computer use contributes to these conditions, and screen-based entertainment can also cause motion sickness.
Step-by-step explanation:
Excessive use of computers and other screen-based devices can lead to a range of health issues. Staring at screens for long durations without breaks can cause symptoms that include headaches, dry eyes, blurred vision, as well as neck and shoulder pain. These discomforts are associated with conditions such as musculoskeletal and neuromuscular disorders, which can arise from the prolonged static posture and repetitive movements typical in computer use.
Furthermore, engagement in sedentary activities, like computer games and web surfing, is increasing, contributing to less physical activity. These lifestyle choices can lead to tension headaches, often resulting from muscle tension caused by stress or prolonged periods of concentration. Additionally, leisure activities, including watching 3-D movies, can induce motion sickness due to the disconnect between what is seen and the body's sense of equilibrium.