The iris, a dark muscular diaphragm behind the cornea, controls the size of the pupil. By adjusting the size of the pupil, the iris regulates and controls the amount of light entering the eye.
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The iris, a dark muscular diaphragm behind the cornea, controls the size of the pupil. By adjusting the size of the pupil, the iris regulates and controls the amount of light entering the eye.
The iris, the colored part of the eye, controls the amount of light entering by adjusting the size of the pupil. In bright conditions, the iris constricts the pupil, reducing the aperture and limiting the light entering the eye. Conversely, in dim lighting, the iris dilates the pupil, enlarging the aperture to allow more light in. This dynamic regulation is crucial for optimizing visual clarity and sensitivity in various lighting conditions. The iris’s ability to swiftly adjust pupil size, a process known as pupillary reflex, helps maintain an optimal balance between light and visual comfort, ensuring effective vision under changing environmental circumstances.