human vision systems

The human vision system allows us to see by capturing light through the eyes and processing it into images. Light enters the eye via the cornea and passes through the lens, which focuses it onto the retina at the back of the eye. The retina contains photoreceptor cells—rods for black-and-white and low-light vision, and cones for color and detail. These cells convert light into electrical signals sent to the brain via the optic nerve. The brain then interprets these signals, enabling us to perceive colors, shapes, depth, and movement for a coherent visual experience.