Influence of visual feedback and speed on micromanipulation accuracy

Abstract

Accuracy in micromanipulation tasks is limited and it is important to identify various factors affecting it. This paper studies the effect of visual magnification, speed and handedness to micromanipulation accuracy using microscope and LCD screen for feedback. Magnification of visual feedback increases the accuracy, but large magnification does not provide further improvement beyond 16x. Further, we observed a trade off between speed and accuracy in tracing a circular path, i.e. faster speed reduces the speed control ability of the hand. Finally, dominant/non-dominant hand is found to affect accuracy in motion.

Comparative evaluation of monocular augmented-reality display for surgical microscopes

“…Preliminary results with surgeons in our laboratory have suggested that viewing the workspace via cameras and computer monitor degrades performance compared to viewing directly through the stereo operating microscope [2]. There have been studies on how the micromanipulation accuracy is affected while performing tasks in microsurgery in different conditions such as posture, visual feedback, grip force, and speed [3–4]. However, there is a general lack of studies that analyze different display methods and their effect on micromanipulation accuracy; evaluation studies of medical augmented reality displays tend to assess only the accuracy of the image registration itself, rather than the accuracy of manipulation enabled by the display [5].…”