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.

What should you observe when transitioning between a dark and a bright room?

• The sound levels

• The temperature change

• The size of your pupils

• The color of the walls

Why do pupils change size?

• To change the color of the iris

• To regulate the amount of light entering the eyes

• To improve hearing

• To adjust to different temperatures

What happens to the pupil in bright light?

• It becomes larger

• It changes color

• It becomes smaller

• It stays the same size

What is the function of the iris in bright light?

• To improve night vision

• To change the eye color

• To protect the eyes from excessive light

• To make the pupil larger

How does the pupil react in darker conditions?

• It becomes smaller

• It changes color

• It stays the same size

• It becomes larger