How Does the Human Eye See in Different Light Conditions?

The human eye is like a camera that changes its settings when it gets brighter or darker.

When it's bright outside, like during the day, your eye uses something called pupils, think of them as little shutters on your eye. When it’s bright, those shutters get smaller so less light comes in. That way, you can still see clearly without everything looking too bright.

When it's dark, like at night, the same shutters open up to let more light come in. It’s like turning on a nightlight, the bigger the pupils, the more light they catch, and the better you can see.

Your eye also has something called retina, which is like the film inside a camera. When it's dark, your eye uses special cells that are really good at catching even tiny amounts of light, kind of like how some flashlights work in the dark.

So whether it’s a sunny day or a moonlit night, your eye changes its settings to help you see clearly, just like a camera!