... more, we have been supplying lenses to many world-known optical companies.We produce single vision, bifocal, progressive, photochromic(Grey, Brown), ... , Super Hydrophobic) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1.67, both in finished and semi-finished. At ... the opportunity to demonstrate our quality service to you. CR39 1.56 1.60 Flat Top Bifocal Lens UC HC HMC EMI