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Jiangsu Maat Optical Technology Co., Ltd is one of leading professional manufactory in the line of photochromic lens in China. Focusing on this field for more than 20 years, we produce all kinds of photochromic lenses, finished and semi finished lenses with Index 1.49, 1.56, 1.6, 1.67 in function with blue cut, in design with single vision, bifocal and progressive lens,and with color grey/brown... See More