Dr. Glen Jeffery

Suddenly, they're getting a lot more light in their eye.

Because the lens was brown, it blocked a lot of the blue wavelengths.

And so they go, everything is very bright.

Everything's very sparkly.

And it was quite a dramatic response.

But the interesting thing is two days later, they said, yeah,

It's gone.

And the brain kind of re-adapts that visual input from the retina.

But going back over the literature of replacing cataracts is quite interesting.

It tells you actually, you know, quite a lot.

Now, when we put those plastic lenses in.

We have UV blockers in them so that the amount of... So you don't actually get a lot of short wavelengths coming through.

But there was certainly the response in the earlier days when we didn't have UV blockers of people saying, God, that's sparkly.

That's really sparkly.

Yeah, we've got a fairly good idea, but I want to just take you back a step, if I may.

There's some really fantastic work coming out at the moment where a few dermatologists are reevaluating the issue of sunlight on the human body.

And the leader of that is a character called Richard Weller.

from Edinburgh.

And he's going back over all the data and Richard's coming out and saying, you know, all cause mortality is lower in people that get a lot of sunlight.

And his argument is that the only thing you've got to avoid is sunburn.