Medical News Today: Does the 20-20-20 rule prevent eye strain?

The 20-20-20 rule says that after spending 20 minutes on the computer, a person should spend 20 seconds looking at an object 20 feet away. This may help to prevent eyes from becoming dry or watery. Here, learn why the 20-20-20 rule is effective. We also describe other ways to protect the eyes from digital strain.
Source: Health News from Medical News Today - Category: Consumer Health News Tags: Eye Health / Blindness Source Type: news