The human eye is a marvel of biological engineering, perfectly designed to capture and process visual information from the surrounding environment. Its intricate structure and precise functioning make it one of the most remarkable sensory organs in the human body. At the forefront of the eye lies the cornea, a transparent, dome-shaped tissue that covers the iris, pupil, and anterior chamber. Serving as the eye's outermost lens, the cornea plays a crucial role in refracting light rays onto the retina, the light-sensitive tissue located at the back of the eye. Surrounding the pupil, the iris adds a burst of color to the eye and regulates the amount of light entering through the pupil. This dynamic structure expands and contracts in response to changes in lighting conditions, adjusting the size of the pupil to optimize visual acuity. At the center of the iris lies the pupil, a black circular aperture through which light enters the eye. Its size is controlled by the iris muscles, which contract to constrict the pupil in bright light and dilate it in dim conditions, regulating the amount of light that reaches the retina.
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