Asthenopia, commonly known as eye strain, is a condition characterized by discomfort or fatigue in the eyes. It often occurs after prolonged activities that require intense focus, such as reading, using a computer, or staring at a smartphone. Symptoms may include blurred vision, headaches, and dry or irritated eyes. The condition can affect anyone, but it is particularly common among individuals who spend long hours in front of screens. To alleviate symptoms, it is recommended to take regular breaks, adjust lighting, and ensure proper ergonomics while working. Using the 20-20-20 rule, where one looks at something 20 feet away for 20 seconds every 20 minutes, can also help.