... . We are also professional in optical lens: CR39 lens, 1.499index single vision lens, 1.56index, 1.61index, 1.67index ... , 1.74index single vision lens, bi-focal lens, and multi focal progressive lens, photochromic lens, polarized lens, tint colorful lens. We export to so ... Suitbale for progressive: no Hinge: stainless hinge Lens: prescription lens and clear lens Color choice: black/grey/brown/silver/red ...