The Perspective Effect of Wide-Angle Lenses in Laparoscopes

Journal article (2002)
Department
Biomechanical Engineering (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2002 Mary Ann Liebert
DOI: https://doi.org/doi:10.1089/109264202762252776
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Published Date

01-12-2002

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Source:

Journal of Laparoendoscopic & Advanced Surgical Techniques, 12 (6), 2002

Faculty

Mechanical, Maritime and Materials Engineering

Department

Biomechanical Engineering

Abstract

Purpose: To evaluate the effect of perspective distortion of wide-angle lenses in laparoscopes on hand-eye coordination during endoscopic manipulation. Methods: Sixteen subjects repeatedly performed a standardized positioning task in a pelvi-trainer under two conditions. The subjects had no prior experience with endoscopic manipulation. In one condition, a wide-angle lens with considerable perspective distortion was used; in the other, a telephoto lens without perspective distortion was used. Task time and number of errors were measured. Results: Task time and the number of errors did not significantly increase in the condition with a wide-angle lens. Conclusions: The perspective effect did not influence task performance in endoscopic manipulation in this experiment. Subjects indicated that they even preferred the wide-angle lens because its extreme perspective improved their perception of depth.

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