I think most people assume that, like a video camera, it pans smoothly across the scene.

But I don't actually think that's what happens.

In truth, I think the I jumps from image to image as it moves across this scene.

So I'm gonna try to find a volunteer to help me demonstrate that what I'd like you to do is scan across this landscape as smoothly as you can.

You try that.

Tell me about the process of scanning across.

You know, from the point just feels like you're stop it and go in on, like, stop in and go in.

And yeah, it's just like this.

Like there's a pause all the time, constantly when you going across.

It's not like you're just looking straight crafts.

It's not smooth.

The eye is capable of tracking smoothly.

However, if something moves across your field of view, your I can lock onto it and move smoothly with it.

What I like to do is I'd like to repeat that little game, but I would like to ask you just to walk across on those rocks and then I'd like you to Just, like, follow her along with your eyes.

Is that possible?

Okay, let's give it a shot.

You wanna go over there?

Okay.

All right.

Go yet.

Go for it.

Can I just get your reaction on what that was like?

How is that the same?

We're different.

Felt a lot smoother because I was following something.

Sort of just looking at something.

Yeah.

You know, just like if you follow something, you're just your brain focuses on that one thing, and you just kind of just go with it.

Why would that be useful To be able to pan with a moving object?

How does that affect our perception of motion?

Well, I think it makes most motion.

Seemed quite smooth and makes it more difficult for us to determine when things are accelerating.

One last question since I've got you guys.

So what I want to do is I want to drop the ball.

I want you guys to watch it and then tell me how the ball moved.

Is that fair enough?

What?

Shit.

Till he hits the ground.

And then afterwards you gonna tell me how it okay?

32 one, the other just one more.

Three, two, one.

Could you tell me about the motion of the ball?

What was it doing as it went down?

It's fast.

Um, it just seemed like it just dropped, but it wasn't even moving.

You just seen the ball.

The ball.

That was that.

You didn't see it like here.

You just saw it from there to there.

What would you say?

It's speed was constant.

Or do you think it's speed was changing?

Constant?

Yeah, it was the same.

Yeah, the whole way down.

No acceleration.

The goal of my whole experiment today I'll let you guys in on a secret is to point out that the eye tracks motion very smoothly.

So when the bowl like goes down, is really easy for us to track that, and it looks like it's just doing one constant thing.

But in fact, it is speeding up the whole time.

When I release it, it's not moving at all.

And when it hits the ground, it's actually going quite fast.

So that was kind of my point.

If you scan across like a stationary scene, then your eyes doing this weird, jumpy thing.

Yeah, but then if you're actually moving with an object or a person or something.

When your eyes are so smooth, you don't even notice.

Yeah, but something that still and you have to move.

That's when it starts a job.

It's much easier.

Yeah, it's excellent.