DilatationPupilEsophageal StenosisVasodilationVasodilator AgentsPupil DisordersTonic PupilEndothelium, VascularReflex, PupillaryIrisMydriaticsTropicamideMiosisMydriasisAnisocoriaPharyngeal MusclesAccommodation, OcularArteriolesPalinuridaeAdie SyndromeAcetylcholineRefraction, OcularAberrometrySchoolsEye ColorNitroglycerinCyclopentolateNephropidaePylorusRefractive ErrorsNitroprussidePia MaterCorneal TopographyIris DiseasesLightVasomotor SystemRespiratory MusclesPalatal MusclesGanglia, InvertebrateRegional Blood FlowNitric OxideVasoconstrictor AgentsVasoconstrictionVisual AcuityCerebral ArteriesDose-Response Relationship, DrugCuldoscopyMuscle TonusBasilar ArteryStudentsOptics and PhotonicsPhenylephrineMuscle ContractionGlareArteriesPresbyopiaFacultyAstigmatismAir Pressure