Sunglasses are important for protection. But over the centuries they have also become fashion accessories and personal ...

In 12th-century China, judges wore sunglasses with smoked quartz lenses to hide their facial expressions — perhaps to retain their dignity or not convey emotions. Very early eyeglasses were ...

In 12th century China, judges wore sunglasses with smoked quartz lenses to hide their facial expressions – perhaps to retain their dignity or not convey emotions. Very early eyeglasses were ...