eyeCare is designed in such a way that it can notify you in multiple ways to take a break. You can configure it in the below different ways.
1. Open up a page to remind you about the break and help you with the exercises during the break. [Video Demo]
2. Remind you with a desktop alert with your a default message or your own message. [Video Demo]
3. Remind you by flashing the extension icon during browsing. [Video Demo]
eyeCare can run in the background, even when Chrome is not running, so that you will get reminded to take a break even when you are working on something else, other than browsing. Click here, if you want to see how to set this up.
More Information:
Below video demonstrates how all of these settings will work on eyeCare.