Real Time Simulation of Phaco-emulsification for Cataract Surgery Training

Abstract

We present a real‐time simulation of the phaco-emulsification task in a virtualreality training system for cataract surgery. Phaco‐emulsification consists in breaking in small fragments an d completely removing the eye crystalline lens by employing an ultra‐sound tool called phaco‐emulsificator. Our ap proach employs a mesh-less shape‐ based dynamic algorithm integrated with a simplex geometry representation in order to efficiently handle the rendering process and the continuous modifications involved by the surg ical tool interaction, and with a smoothed particle hydrodynamics scheme with spatial ordering for handling fragmen ts interactions. The complete training system also simulates other tasks involved in cataract surgery, like the cor neal incision and the capsulorhexis. The simulator runs on a multiprocessing PC platform and provides realistic ph ysically-based visual simulations of tools interactions. The current setup employs SensAble PHANToM for s imulating the interaction devices, and a binocular display for presenting images to the user.