What are the five steps in the process of seeing?

The process of seeing involves five key steps: first, light reflects off objects and enters the eye through the cornea; second, the light passes through the pupil, regulated by the iris; third, it is focused by the lens onto the retina at the back of the eye; fourth, photoreceptor cells in the retina convert the light into electrical signals; and finally, these signals are transmitted to the brain via the optic nerve, where they are interpreted as visual images.