Peter Haddon

speaker

51 appearances 1 recordings 1 series first heard Jul 2026 last heard 31 Jul

Peter Haddon’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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But I kind of got a bit hooked on penguins.

I've always been interested a bit in nature and penguins are very cute and not much is known about them.

Their core sometimes is bycatch.

Quite a few of the ones in New Zealand, especially ones like the yellow-eyed penguin, are endangered.

So the more we know about them, maybe the more we'll be able to help them too.

So that's because to see, to get things in focus, you have to use lenses to place the light and focus on the back of your eye, on your retina.

And there are two parts of the eye that do that.

There's the cornea, the very front surface, and then there's a lens inside it.

Humans do most of their focusing in the cornea.

But when you go underwater, you suddenly have no power in the cornea.

It's unable to do anything.

It basically becomes useless underwater, almost useless.

And so you're completely reliant on your lens.

And because your lens can't do all that focusing, everything's blurry.

But when you put goggles on, you regain the use of your cornea because you've now got air in front of your cornea.

You need an air-cornea transition to make the cornea work.

So how do penguins see underwater?

Because they don't wear goggles.

Penguins have flatter corneas than ours, although it does vary between species.

In the smaller ones, like the little or fairy penguin, it has steeper corneas than the larger penguins.

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