Hi,
We have put up a test build that makes some adjustments to eyelid tracking with the 2D camera tracking. It would be great to get some feedback.
You will find the installers here: https://github.com/highfidelity/hifi/pull/4836
It allows you to turn off Binary eyelid control:
If you have Binary Eyelid control on you can adjust the threshold in your preferences, here: