Shutoo Gavazzi, a Hong Kong company committed to improving the quality of sunglasses with its technology niche, is eager to introduce its the ground-breaking “Shutter photochromism” technology from Switzerland to the eyewear market, bringing hopes and surprises to our speckies.

“Shutter Photochromism” is a state-of-the-art technology which allows the lens to “turns black when met with light;... See More