These are the results:
 
1. I reinstalled Tobii EyeX with removing registry entries but in dit not help. Message about screen proportion still occurs.
It is probably related to TV connected to PC. When I select in Windows monitor as only active display it wont show. This is probably some bug because both, TV and monitor is 16:9 and I use screen cloning so the resolution is FULL HD.
 
2. I tried to cover to mirror it did not help.
 
3. I tried tracker with other user, the results were better but not perfect.
 
4. When calibration is good? I mean, if I am able to focus on the circle it is good or I should be able to perfectly aim the dot at the center?

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