I See You

The video explains how sight, one of the five senses, relies on light. It describes the roles of different parts of the eye, including the iris, pupil, lens, and retina, in processing light to enable vision. The iris adjusts to light levels, the pupil allows light entry, the lens focuses light, and the retina sends visual information to the brain. The video emphasizes that without light, sight is not possible.

Explain how the pupil and iris work together to control light entering the eye.

What happens to the lens of the eye when light enters?