Positioning and stabilizing the image of an object exactly on the fovea of both eyes at the same time; Hering's law (RMR + & LLR +) - The agonist and antagonist muscles of the two eyes are always simultaneously innervated;
Sherrington's law (LLR + & LMR 0 or RMR + & RLR 0) - each contraction of an agonist occurs in conjunction with relaxation of the corresponding antagonist.