Carpal tunnel syndrome is caused by pressure on the median nerve in the wrist, resulting in numbness, tingling, or weakness in the hand and fingers. It is common in people who do repetitive tasks like sewing, assembly line work, or playing musical instruments, especially in women ages 30-60. Treatment may include wearing a splint, medication, or surgery. Internet addiction can involve overuse of social media, online games, or activities like online gambling and can be associated with anxiety, depression, stress, and isolation from friends and family. Eye strain occurs from prolonged close work like computer use and results in sore eyes, blurred vision, neck pain, and light sensitivity.