How do photochromatic lenses work?
Episodio 4 min 21s

How do photochromatic lenses work?

Da BrainStuff iHeartPodcasts
Photochromatic lenses darken when exposed to the sun. Discover where these lenses came from, how they work and why they're commonly referred to as "transition" lenses in this episode of BrainStuff.

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