ABSTRACT
Pupil diameter is under autonomic control:
– the radially arranged dilator pupillae is sympathetically innervated
– the circumferentially arranged sphincter pupillae muscle receives parasympathetic innervation and constricts the pupil.
Pupil diameter is under autonomic control:
– the radially arranged dilator pupillae is sympathetically innervated
– the circumferentially arranged sphincter pupillae muscle receives parasympathetic innervation and constricts the pupil.