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András Bálint, Balázs Varsányi, Zsolt Biró; Motion capture of capsulorhexis forceps. Invest. Ophthalmol. Vis. Sci. 2018;59(9):439. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
Elaborating a process to analyze the motion of capsulorhexis forceps during creating capsulorhexis as part of cataract surgery.
We used motion capturing methods based on techniques known from blockbuster movies. White and blue reference points were drawn on capsulorhexis forceps. After sterilizing, these marked forceps were used for creating capsulorhexis. The whole process was recorded on a full HD resolution digital camera connected to surgical microscope. We could analyze these recordings with Autodesk Matchmover 2014 software. The movements of marked points could be tracked by this software and their motion vectors could be calculated in a two dimensional coordinate system. These vectors were imported to graphics editor software (Autodesk Maya 2018). As we know the exact distance of the marked points, the program could calculate the Z-axis of the movements from approching and receding, so the movements could be visualized in a three dimensional space. Iris and conjuctival vessels served as reference to correct the undesirable movements resulting from bulbar rotation.
Five uneventful cataract operations performed by experienced surgeon were recorded and implemented successfully according to this process.
Motion capturing the capsulorhexis forceps can efficiently help to understand the use of forceps for beginner surgeons and also to monitor the learning curve of this step of cataract operation. The technique also seems suitable to subsequent examination of actions made during complications and so prevent further difficulties in latter similar situations.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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