Optical eddy current is a concept within the field of optics that characterizes light fields exhibiting swirling patterns of energy flow, analogous to electrical or fluid dynamic eddies. This area of study focuses on structured light, particularly optical vortices endowed with orbital angular momentum (OAM), investigating their generation, propagation, manipulation, and interaction with matter, which is significant for applications ranging from advanced microscopy and particle manipulation to novel optical communication and quantum information systems.