Variable neutral density (ND) filters are handy tools for photographers, in that their opacity can be adjusted simply by ...

Here’s how it works. If you’re in the market for running sunglasses but aren’t sure where to start—or wondering if you even need a pair based on your local weather—you’re not alone.

When we talk about smart glasses, we generally mean eyewear that includes augmented reality technology. This merges what you see in the real world with virtual information, and usually overlays ...