Dr. Glen Jeffery

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1,102 appearances 1 recordings 1 series first heard Dec 2025 last heard 1 Dec

Dr. Glen Jeffery’s voice in public audio — every appearance, attributed to the second.

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Huberman Lab · Using Red Light to Improve Metabolism & the Harmful Effects of LEDs | Dr. Glen Jeffery · 1 Dec 2025 podcast

Oh, you've done that experiment?

We've done that experiment.

No, no.

I think the answer is that the blue in most of those screens is actually rather long wavelength blue.

So it's blue pushing 450 plus.

So it's not in that danger zone, which I regard as 420 to 440.

I think it's outside it.

And I know we talked at one point to a major American computer manufacturer about this issue about the screen.

So I am not as worried about that as I...

thought I would have been.

But there is a separate issue, and it's one that the pediatric ophthalmologists are very concerned about, and that is particularly close work in kids, close work combined with a lot of screen work, and the issue of myopia.

Close work, staring at something within a foot or two.

Yeah, and myopia.

Now, this is a very big issue in Asia,

And in China, and we know that the absence of long wavelength light is a driver.

My problem is I can't work out why.

Now, I should fundamentally be a pragmatist and say, if we know it's a driver, then let's just supplement it.

When you say it's a driver, it's creating this problem.

It is part of the thing that's creating this problem.

Now, myopia is a really big issue because, okay, we can control myopia by just giving you different lenses.

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