Why can the eyes see things?

This is mainly due to the role of the eyeball. There is a small round hole in the middle of our eyeball, called the pupil. When we look at things, light passes through this small hole and falls on the lens of the eyeball. After refraction, an image is finally formed on the retina behind the eyeball, and what we see is transmitted to the brain through the optic nerve. In this way, we can see things