What causes night blindness?

Night blindness means your eyes have trouble seeing when it gets dark. It’s like trying to read a book under a dim lamp instead of a bright light, everything looks blurry and fuzzy.

Your eyes use something called light to see, just like how you need sunlight to see colors clearly outside. When it's dark, there isn’t much light around, so your eyes need help catching that little bit of light.

That’s where rods, tiny parts inside your eyes, come in. They're like little helpers that work best in the dark. But if they don't get enough of a special helper called vitamin A, they can't do their job very well, just like how you need fuel to run fast.

Sometimes people don’t have enough vitamin A because they don’t eat foods that give it to them, like carrots or sweet potatoes. That’s why night blindness happens, your eyes are trying their best, but they're not getting the help they need when it gets dark.