ELI5: Explain Like I'm 5

Optical coherence tomography

Optical coherence tomography or OCT is like taking a picture of the inside of your body. It uses light to create a picture of what's happening under your skin or inside your eyes.

Imagine you have a toy car and you want to see how it was made. When you break it apart, you can see all the pieces inside. OCT is similar, except it does it without hurting you.

It uses a special light that can go through your skin and bounce back from the inside of your body. Then a computer takes all those tiny bits of light and puts them together to make a picture. It's like putting together a puzzle but with light.

Doctors use OCT to look inside your eyes to check if you have any problems like glaucoma or macular degeneration. They can also check if your heart is working well, if your skin has any damage, or if your teeth are healthy.

With OCT, doctors can find the problem before it becomes big and can treat it faster. And the best part is, it doesn't hurt at all!