ocr: RSR RIO LIO LSR - - - - - - - - - - - - RLR - - - (1 - - - - - LLR - - - RMR - - - LMR OD OS RIR RSO LSO LIR Diagrammatic representation of direction of action of ocular muscles of each eye. View is from the front. Arrows indicate direction of maximum action of each muscle. Parallel arrows running in the same direction represent yoke muscles.