The center of the eye where light enters, often referred to as the 'pupil', which expands and contracts to control the amount of light reaching the retina.
The small, round, dark area in the eye that is associated with the expression of emotions and intentions, as well as the ability to perceive and engage with the surrounding world.
A term that can broadly refer to the entire eye, often used in a poetic or figurative context to convey beauty, innocence, or the capacity for observation.
Example:
は日のあたる所では収縮する。
A circular opening located in the center of the iris that allows light to enter the eye and reach the retina, regulating the amount of light and depth of focus through its ability to autonomously adjust in size.
The entry point for light within the eye, bordered by the iris, which plays a crucial role in controlling vision by adjusting its diameter in response to varying light conditions.
The anatomical structure in the eye that facilitates vision by modulating light intake, surrounded by the colored part of the eye known as the iris, and characterized by its ability to change size reflexively.
The central, circular opening within the eye that regulates the amount of light that enters, affecting vision.
The specific part of the eye that is essential for focusing light and providing clarity to visual perception.
The condition in which the pupils of the eyes become larger than normal, often in response to low light or certain physiological or psychological factors.
A physiological response characterized by the widening of the pupils, which can indicate a range of emotional or medical states.
The process involving the relaxation of the muscles controlling the pupil size, resulting in an increased diameter that allows more light to enter the eye.
A state in which the pupil of the eye expands to a diameter of 4 millimeters or more, often occurring in response to low light conditions, sudden changes, or certain medical conditions.
The condition characterized by an abnormal or excessive widening of the pupil, which may indicate underlying health issues such as glaucoma, contrasting with the constricted state of the pupil.
A physiological response where the pupil enlarges, potentially caused by environmental stimuli or health disorders, distinguishing it from the normal narrowing of the pupil.