Joy was a hard worker. She loved her job as a graphic designer, but she spent long hours in front of her computer screen. Over time, she started to experience eye pain, fatigue, and headaches.

At first, Joy tried to ignore the symptoms. She figured that everyone felt a little eye strain from time to time. But as the weeks went by, the pain got worse. She started to have difficulty focusing on her work, and her headaches were becoming unbearable.