A new recording system of eye movements with charge coupled device(CCD) image-sensor.
Junichi Matsushima, Masahiko Kumagai, Tohru Ifukube, Chihiro Harada · Equilibrium Research · 1988
We developed a new recording system of eye movements with a CCD image-sensor in a video-camera. Eye movements are recorded as movements of the pupil which are pictured with a CCD image-sensor. The eye movements, which we can watch on green display, are recorded simultaneously on recording papers. The recordings are stored on floppy disks and analyzed by a computer off-line.We can record not only horizontal but also vertical eye movements with our recording system. The noise level of this system is below 1% while the recording area is ±15° in the horizontal plane and is ±10° in the vertical plane. There are high linearities in eye positions and no drifts of base lines in recording.The clinical uses of this system are as follows: 1 Precise recordings of abnormal eye movements. 2 Quantitative analysis of horizontal and vertical smooth pursuits. 3 Quantitative analysis of eye drift on fixation.