The best reading glasses combine modern frames with comfortable lenses that let you see better—and look stylish. Here are the ...

Bulk fragility: A measure of how quickly the dynamics of a glass are excited when it is heated to become a liquid; fragile glasses show rapid changes, while strong glasses exhibit more resistance.

The content is produced solely by The Conversation. Sunglasses, or dark glasses, have always guarded against strong sunlight, but is there more to “shades” than we think? The pupils of our ...