LEUVEN, Belgium—The new look in eyewear is 3-D, but today it isn’t about movie effects. The focus is on how glasses are made. Additive manufacturing, better known as 3-D printing, is edging into the roughly $60 billion global eyeglass-frame market, promising more choice for consumers and savings for producers. Today, huge numbers of frames sit unsold because traditional production entails big runs, while 3-D printing doesn’t. Eyewear makers throw away roughly 75 percent of every sheet of acetate from which most plastic frames are cut, while 3-D printing leaves almost no waste. Consumers will pay up to 20 percent extra for customized frames, producers say, and personalization adds no cost with 3-D printing. Click here to read the full story from The Wall Street Journal.