Dr. Glen Jeffery

So your child will be able to read the text even though they've got myopia.

The trouble is that when that child reaches 40 or 50, the retina has been stretched because the eye has grown too long.

And as the retina stretches as you age and you lose cells, so the retina becomes a little less cohesive, you get tears and you can get a form of macular degeneration.

Yikes.

So this is a major concern, particularly in China, and they've taken a number of steps to deal with it.

One of which, for instance, is...

In the classroom, they put a bar on the desk so the kids can't actually sit too far forward to read the text.

Whoa.

Right?

So to increase the distance.

They've also got into the red light, but part of the problem there is they've used lasers.

So, they've got a restriction in myopic development, but at the same time, when you go back and look at them, there are spots in the retina where the laser has affected.

Negatively.

Yeah.

But people come along and they say, well, we only use 10 milliwatts per centimeter squared.

Same as an LED.

The thing that they don't get is that laser light scatters in a very different way from LEDs.

LED light scatters uniformly.

Why do you think they use lasers?

Because it sounds good.