I WONDER - What Job Does The Pupil In The Eye Do?

The video explains how pupils in the human eye adjust their size to regulate the amount of light entering the eye. In bright conditions, the iris contracts the pupil to protect the eye from excessive light, while in darker conditions, the pupil enlarges to allow more light in, enhancing vision.

Describe the effect of too much light on your eyes.

What is the purpose of the pupil getting bigger in darker light?