An analysis of the forces determining the size of the pupil.
D003250:Constriction; D004106:Dilatation; D006801:Humans; D007429:Intraocular Pressure; D007498:Iris / Q000502:physiology; D009119:Muscle Contraction; D009801:Oculomotor Muscles / Q000502:physiology*; D011680:Pupil / Q000033:anatomy & histology / Q000502:physiology*