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Calibration Quality Sample

The Calibration Quality sample visualizes the quality of each calibration point for each eye in the current calibration. You can read more about this in the Configuration Overview.

Table of Contents


Here, you can download the prebuilt sample for your device. Source code access for the sample is provided as a part of Tobii Ocumen.

Device Download
Pico Neo 3 Pro Eye
HP Reverb G2 Omnicept Edition


The scene is interactive, allowing you to select a precision standard deviation using gaze selection and pressing the Configured Button. You can also select an eye visualization to expand it into the first person point of view in the headset.

The Configured Button is any of the following:

  • Spacebar
  • Pico headset button
  • Controller trigger button


Point is the stimulus position used for the calibration and is visualized as a plus symbol.

Bias is shown as a green circle. This means that the person’s bias lies on the green circle, however the exact location of bias on the circle (or direction of bias) is not specified. The exact location is not reported by our calibration algorithm, but this can be calculated by measuring calibration quality yourself.

Precision is shown as blue dots which are centered on the edge of the green circle. Higher precision results in a narrow spread of blue dots, whereas lower precision results in a wider spread. In other words, the thickness of the circular line of blue dots is equivalent to the diameter of the precision spread, for the chosen standard deviation.

Used determines if a point was used to create the calibration. Points can be excluded due to different factors such as poor quality.

Valid is true if enough valid data for this point was collected during the calibration. It can only be false if data for one eye was not collected. If no data for either eye was collected for a point, the point will not be returned by the calibration API.