| Tobii Pro SDK C API
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| Data Fields | |
| int64_t | device_time_stamp | 
| int64_t | system_time_stamp | 
| TobiiResearchValidity | left_eye_validity | 
| float | left_eye_openness_value | 
| TobiiResearchValidity | right_eye_validity | 
| float | right_eye_openness_value | 
Provides data for the tobii_research_eye_openness_data_callback callback.
| int64_t TobiiResearchEyeOpennessData::device_time_stamp | 
The time stamp according to the eye tracker's internal clock.
| float TobiiResearchEyeOpennessData::left_eye_openness_value | 
The value of the left absolute eye openness.
| TobiiResearchValidity TobiiResearchEyeOpennessData::left_eye_validity | 
Gets the validity of the eye openness data for the left eye.
| float TobiiResearchEyeOpennessData::right_eye_openness_value | 
The value of the right absolute eye openness.
| TobiiResearchValidity TobiiResearchEyeOpennessData::right_eye_validity | 
Gets the validity of the eye openness data for the right eye.
| int64_t TobiiResearchEyeOpennessData::system_time_stamp | 
The time stamp according to the computer's internal clock.