Post by Maali Mamoun

🧠👁️ The Pupil: A Small Structure with a Powerful Role Although it appears as a simple opening in the center of the iris, the pupil is continuously adjusting to changes in light, focus, and even emotional states. Its size is regulated by a delicate balance between two autonomic pathways: 🔹 Parasympathetic Stimulation → Miosis • Contraction of the sphincter pupillae muscle • Occurs in bright illumination and near fixation • Helps improve image quality and reduce optical aberrations 🔹 Sympathetic Stimulation → Mydriasis • Contraction of the dilator pupillae muscle • Occurs in dim environments, stress, and heightened alertness • Increases retinal illumination under low-light conditions Understanding pupillary physiology is essential in clinical practice, as subtle changes in pupil size and reactivity may provide valuable clues about ocular, neurological, and pharmacological conditions. Sometimes, the pupil reveals more than visual function—it reflects the status of the entire autonomic nervous system. #Optometry #EyeHealth #Pupil #PupillaryReflex #Miosis #Mydriasis #NeuroOptometry #ClinicalOptometry #OcularPhysiology #AutonomicNervousSystem #VisionScience #EyeExamination #HealthcareEducation #Optometrist #Ophthalmology #MedicalEducation #VisionCare #EyeCareProfessionals #LearningInPublic #DHAOptometrist 👁️✨