From APM, American Public Media, and WNYC.

This is Freakonomics Radio on Marketplace.

Here's the host of Marketplace, Kyra's Doll.

Time now for a little Freakonomics radio that moment every couple of weeks where we talk to Stephen Dubner.

He is the co-author of the books and the blog of the same name.

It is the hidden side of everything Dubner good to have you back.

Great to be here, Ky. I don't know with the LA teams out of the NBA playoffs now.

I don't know if you're still paying attention.

I am so done with the Lakers.

I was, and people are like, this is where the hate mail from LA comes in.

But I mean, come on, really get over yourself.

Well, there is a trend besides the demise of the Lakers that is unmistakable,

but it's a trend off the court. It's something you see during the post-game press conferences.

And that is that just about every star player, LeBron James and Duane Wade, Kevin Garnett and Kevin Durant,

they're all wearing these big chunky black eyeglasses.

You know, the kind of the Erkle used to wear.

Depending on your time frame, you know, buddy Holly.

But that's right. I saw, who was? I guess it was LeBron.

I saw the press conference from Miami, yeah.

There you go. Now, in the old days, it was pretty uncommon to see many athletes wear any kind of glasses.

So my first thought was simply, hey, you know, maybe poor eyesight is on the rise.

So we reached out to Susan Vitale. She's a researcher at the National Eye Institute.

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