The sequence 20-20-20 commonly refers to a technique used to mitigate digital eye strain. This method encourages regular breaks from screens to refocus the eyes and alleviate discomfort. It suggests that for every 20 minutes spent looking at a screen, one should look at an object 20 feet away for 20 seconds.
The importance of this practice lies in its potential to reduce eye fatigue, headaches, and blurred vision associated with prolonged screen time. Regular adherence to this rule can contribute to improved eye health and overall well-being, particularly in individuals who spend significant portions of their day using computers, tablets, or smartphones. While the origin of this recommendation is not definitively documented, its widespread adoption suggests its perceived effectiveness in addressing digital eye strain symptoms.