How do we see?
We see when light enters our eyes and is focused onto the retina, a layer of tissue at the back of the eye. The retina contains specialized cells called photoreceptors, which convert the light into electrical signals that are sent through the optic nerve to the brain. The brain then interprets these signals as the visual images that we perceive.
The process of focusing light onto the retina is facilitated by several structures in the eye, including the cornea (the clear outermost layer of the eye), the lens (which can change shape to adjust focus), and the iris (which controls the amount of light that enters the eye). The eye also contains various fluids, including aqueous humor and vitreous humor, that help maintain its shape and protect the delicate structures inside.
Overall, the process of seeing is a complex interplay of physical and neurological processes that allow us to perceive the world around us.
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