Building a time based tool to help with Eye Strain

In this day and age, we all have screen time that we might be not so proud of:

Personally having high screen time, some of us who are developers sometimes even have to crunch.
I came across this rule which says to take 20 seconds breaks every 20 minutes and look far away around 20 feet.
This is not new or innovative, it has been done, but I just didn't feel convinced enough with what is on the market so going to give this a go.
This is a tool I intend you test run on myself, but you are free to get to know more about this, and it will be in form of chrome extension and released around new year 2022 - 2023.
If you are interested, you can check out detailed blog I wrote on The Problem and The Solution: https://blog.mitochondriastudios.com/continuous-screen-time-you-may-have-eye-strain-and-drain-in-the-digital-era

Thanks for your time.