Iris Mechanism

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The iris mechanism is a crucial component within our eyes that plays a vital role in controlling the amount of light entering through the pupil. It works by adjusting the size of the pupil, thereby regulating the exposure to light and maintaining sharp visual focus. This intricate system is comprised of a ring of smooth muscle fibers situated around the pupil, which can either contract or dilate based on external stimuli, such as brightness levels, to ensure optimal vision in varying lighting conditions.