Unlike similar screen-free wearables, no subscription is required.

A new system could create patient-specific lenses for those with irregular corneas who struggle with traditional contact lenses.

The Clean Air Act only covers outdoor air, but some pollutants lurk indoors. I consulted experts to determine whether air purifiers are enough to protect our airways.

The Penn State team behind these temporary tats hopes they can help spot heart attacks or power robotic prosthetics.