Have you ever looked at your eyes in the mirror? They look like squidgy white balls, but they're a lot more complicated than that.
They work a lot like a video camera - taking in colours and shapes and then turning them into information that your brain can understand.
The most noticeable part of your eyes (the white bits!) is called the sclera. Its job is to protect your eyes (along with your eyelids). Look at them closely and you'll see lots of tiny lines - these are blood vessels, taking blood into your eyes.
Under this, you'll find (but won't see) the cornea. It's a clear substance that works like a lens, helping your eyes to focus. The iris (that's the coloured part) allow enough light into your eyes. And, if it's bright, they'll stop too much coming in!
Did you know?
Our eyes are always the same size but our ears and nose never stop growing!