Detailed Product Description CR-39 1.499, middle index 1.56, high index 1.61, UC, HC, HMC from single vision to high power with high cylinder, also including round, flat top bifocal lens ,progressive lens and photochromic lens and so on. stock information:1.56 progressive lens (short) 72mm (+/+) 30,000prs AB grade 1.49 blank lens 65mm (+/-) 70,000prs AB grade1.49 blank lens 65mm (-/-) 30,000prs ...