Optical lenses - finished single vision lens (index:1.499): uncoated, hc, hmc, middle index lens (index:1.56): finished and semi-finished, uncoated, hc, hmc, high index lens(index:1.61): finished and semi-finished, uncoated, hc, hmc, 1.70 hi-index glass lens, bifocal lens, finished and semi-finished (index:1.499): flat top bifocal (28d/70mm), round top bifocal(28d/70mm, 24d/70mm).
