| Tobii Pro SDK C API
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| Data Fields | |
| TobiiResearchNormalizedPoint2D | position_on_display_area | 
| TobiiResearchCalibrationEyeValidity | validity | 
Represents the calibration sample data collected for one eye.
| TobiiResearchNormalizedPoint2D TobiiResearchCalibrationEyeData::position_on_display_area | 
The eye sample position on the active display Area for the left eye.
| TobiiResearchCalibrationEyeValidity TobiiResearchCalibrationEyeData::validity | 
Information about if the sample was used or not in the calculation for the left eye.