Ophthalmic procedures often require a surgical instrument to pivot around a fixed point, such as the entry incision. Rather than using a dedicated mechanical remote centre of motion, general-purpose robotic manipulators can enforce this constraint in software. A new arXiv preprint (2610.27905) studies how to keep such a software RCM stable during precise motion.
The abstract notes that at some reachable configurations, which are not singular for the tip task alone, the RCM and tip-tracking objectives come into conflict. The full details of that failure mode are not given in the abstract text, but the paper's title points to a specific remedy: a hierarchical quadratic-programming (QP) controller combined with authority-guided recovery planning.
The proposed approach uses the RCM as a high-priority authority that guides replanning when lower-priority tip-tracking would otherwise violate the constraint. This article is based solely on the preprint abstract, so the description reflects the authors' framing rather than an independent evaluation.