The organ in the human body responsible for vision is the eye. The eye is a complex organ consisting of various parts, such as the cornea, lens, retina, and optic nerve. Light enters the eye through the cornea, which helps to focus it, and passes through the lens, which further adjusts the focus on the retina. The retina, which is located at the back of the eye, contains photoreceptor cells (rods and cones) that convert light into electrical signals. These signals are transmitted to the brain via the optic nerve, allowing us to perceive images and colors.