Calibration Report - Head - Interacoustics EyeSeeCam Instructions For Use Manual

EyeSeeCam vHIT Instructions for Use – EN Page 23
Figure 4-13 Graphical representation of the data
The head calibration aligns the possibly oblique inertial sensor axes with the true earth-horizontal and
earth-vertical directions. During head calibration the Real-Time Preview shows in the upper two diagrams
the head velocity and eye position over time. Please try to keep peak head velocity around 50 deg/sec,
although the exact value is not important. However, it is important to not exceed 100 deg/sec such that
the patient can keep the eyes on the fixation target on the wall. At head velocities exceeding 100 deg/sec
patients with a vestibular loss will not be able to keep their eyes on the target due to the limitations of the
human smooth pursuit system.
The lower two polar diagrams show the head movement directions in the coordinate system of the
camera-attached inertial sensors. From this information the calibration analysis will automatically remap
the alignment of the sensors.
4.3.3 Calibration report – head
After the calibration is completed the Full report for the head calibration will be generated automatically.
This report presents the information in a similar way as the polar diagrams of the Real-Time Preview.
However, the eye and head motions over time are not shown. Instead, a three-dimensional
representation of head movements with respect to the earth horizontal and vertical directions is shown
together with the head movements with respect to the possibly oblique axes of the inertial sensor. The
three polar diagrams at the bottom of the report show the head movements from three different
perspectives.