I'm Flora Lichtenen and you're listening to Science Friday.

Today in the show, a close look at the biology of vision.

We'll get the big picture.

Yes, there is an upper limit for an average observer to how many pixels they can resolve.

If we add any pixels beyond that, then the human eye is not able to perceive that extra resolution.

As Black Friday approaches, you're probably being inundated with ads for bigger, better televisions.

4K, 8K, super duper, mega crystal, QLED,

UHD plus. But how good is good enough? Are there limits to what our eyes can even make out?

And just how similar is my visual experience to yours? Today we are talking about how we see the world with two experts.

Dr. Malia Ashraf is a postdoc at the University of Cambridge in the UK, and she's the lead

author on a new study about display resolution published in the journal Nature Communications.

And Dr. Brian Jones is a retinal neuroscientist and professor of ophthalmology at the University

of Pittsburgh.

Welcome to you both to Science Friday.

Thank you.

Thank you so much.

Malia, your team studied what resolution people can actually see.

Is there a point at which more pixels don't matter?

Yes, so that's exactly what you measure.

In quantitative terms, it's 94 pixels per degree.

So in each angle of your field of vision, you can see up to 94 pixels if your stimulus or the content

that you're seeing was black and white fine lines. And in terms of technology,

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