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Analysis of eye gaze: do novice surgeons look at the same location as expert surgeons during a laparoscopic
Rana S A Khan1, Geoffrey Tien, M Stella Atkins
1Department of Surgery, University of British Columbia, 2775 Laurel Street 5th Floor, Vancouver, BC, V5Z 1M9, Canada. r.s.a.khan@gmail.com
Introduction:
Eye-gaze technology can be used to track the gaze of surgeons on the surgical monitor. We examine the gaze of surgeons performing a task in the operating room and later watching the operative video in a lab. We also examined gaze of video watching by surgical residents.
Methods:
Data collection required two phases. Phase 1 involved recording the real-time eye gaze of expert surgeons while they were performing laparoscopic procedures in the operating room. The videos were used for phase 2. Phase 2 involved showing the recorded videos to the same expert surgeons, and while they were watching the videos (self-watching), their eye gaze was recorded. Junior residents (PGY 1-3) also were asked to watch the videos (other-watching) and their eye gaze was recorded. Dual eye-gaze similarity in self-watching was computed by the level of gaze overlay and compared with other-watching.
Results:
Sixteen cases of laparoscopic cholecystectomy were recorded in the operating room. When experts watched the videos, there was a 55% overlap of eye gaze; yet when novices watched, only a 43.8% overlap (p < 0.001) was shown.
Conclusions:
These findings show that there is a significant difference in gaze patterns between novice and expert surgeons while watching surgical videos. Expert gaze recording from the operating room can be used to make teaching videos for gaze training to expedite learning curves of novice surgeons.
