Eye Openness difference between callback and GetEyeOpenness in VIVE Eye and Facial Tracking SDK Posted July 6 Hello, Thank you! Is there anything in the documentation where I can read more about what wide is? For GetEyeOpenness is explains openness as a value clamped between 0 and 1. For the SingleEyeDate struct, the float eye_openess it simply says its a value representing how open the eye is, but it doesn't say anything about wide. It seems that based upon my results that wide was behaving very differently for the two eyes. For one eye I was getting between 0 and up to 2 million. This means, if openness is between 0 and 1, that wide was sometimes very large, ranging from 0 to 2 million. For the other eye I was getting tiny values between 10^-15 and 10^-5. This means, if openness is between 0 and 1 then for this eye, the wide variable is negative, pushing the value I found to be extremely tiny. So whatever wide represents it seems to be very different for my two eyes, and it seems to entirely overwhelm any signal contained in the openness variable.