ABO NOCE Practice Test 2026 - Free Optician Certification Practice Questions and Study Guide

The "20-20-20 rule" specifically advises that after every 20 minutes of looking at a screen, individuals should take a 20-second break and focus their eyes on something 20 feet away. This is designed to mitigate eye strain often caused by prolonged screen use, a common issue in today's digital environment. The break allows the eye muscles to relax, reduces fatigue, and helps prevent discomfort associated with digital eye strain, including symptoms like dryness and blurred vision.

Taking a break every 20 minutes, as suggested by this rule, emphasizes the importance of periodically disconnecting from screens for a brief time, contributing to better eye health and overall well-being for anyone who spends significant time in front of screens.