1854 6 156 Excitors of voluntary nerves and pupil dilators.
1868 A. B. Garrod (ed. 3) 415 Medicines which act upon the eyes... Pupil Dilators (Mydriatics)... Pupil Contractors (Myositics).
2003 (Electronic ed.) 89 3179 There was a resultant miosis (decrease in pupil diameter) from the relaxation of the pupil dilator muscle.