Photochromic lenses are lenses that change ... If you’re ready to take the leap into the world of transition glasses, ...

homemade glass, including the photochromic variety. That DIY glassmaking remains a largely untapped vein is not surprising given what [Ben] learned over the last months of experimenting.

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Depending on your needs, one may be better suited for you than the other. Transition glasses, also called photochromic lenses, are eyeglasses that respond to UV rays by transitioning to a darker tint.

What's more, the back piece of glass in each lens can be replaced with a custom prescription lens if needed. And yes, photochromic transition lenses do already change tint automatically.

Imagine sunglasses that let you adjust their tint with a simple twist, inspired by photography technology. Lombell’s ...