optical laboratory supplies Index: 1.49, 1.56, 1.61, 1.67 Dia:55/60/65/70mm Stock power range and high cylinder CE, FDA, ISO9001 Index: 1.499, 1.56, 1.61, 1.67 resin & 1.523, 1.70 glass Itemssingle lens, bifocal lens, progressive lens, photochromic lens, photochromic progressive lens, semi-finished, finished, RX..