What is the eye detection indicator and how do I use it to check the status in Windows Control?

The Eye Detection Indicator is a discrete indicator on the Activity field in Windows showing if Windows Control has detected the user’s eyes.
The Eye Detection Indicator can have different status:

1. Eyes detected (shown by two white dots on a black screen). It will also act as a position guide for the user.  
2. No eyes are detected (shown by two gray X’s on a black screen).
3. No eye tracker connected or eye tracker disabled (shown by two white dots and an exclamation point on a black screen).