scrbreak
scrbreak (pronounced Screen Break) is a Windows tool that works as a Timer to remind you to take a break from your screen every 30 minutes or a predefined number of minutes
Introduction
It is a no secret that no matter how many filters you have on your PC’s screen or how many awards your monitor won in eye care, You will still need to take a break from your PC’s display every predefined amount of minutes to help protect your eyes and prevent sleeplessness.
Since no piece of software can move you away from your PC, this tool does its job by reminding you to take frequent breaks every predefined number of minutes (usually 30 minutes).
Full description available here: https://insertx2k.github.io/scrbreak/