« View GlossaryThe adjustable opening at the center of the iris that allows varying amounts of light to enter the eye. Articles featuring this term: 7 Reasons Your Pupils Are TinyGlossary: IrisGlossary: DilationGlossary: CorneaSmartphones Used to Detect Eye ProblemsCSI and VisionShould You be Concerned About Ocular Melanoma?Watch Out for Eye CancerEspecially for Diabetics – Take Good Care of Your Teeth and EyesDiabetics Focus on Managing Eye Concerns« View Glossary