Vergence

Vergence is what happens when you look at something that is close to your face or far away. Your eyes have to work together to make sure that you see the same thing with both eyes.

Imagine you have two crayons in front of you. If you look at one of the crayons with just your right eye, it looks bigger than it really is. If you close your right eye and look at the same crayon with just your left eye, it looks bigger again. But if you look at both crayons with both eyes, your brain puts the two pictures together and makes it look like one big crayon.

When things are far away, your eyes turn a little bit outward. When things are closer to your face, your eyes turn inward a little bit more than usual. This is called “convergence”.

It’s like when you try to cross your eyes to look at the tip of your nose. You’re moving your eyes so that they both point to the same place. But when you look far away, your eyes are more relaxed and just point straight ahead.

Vergence is important because it helps your brain make sense of what you’re seeing. Without it, things would look blurry or like double vision, and you wouldn’t be able to tell how far away things are or where they are in space.