Optical glass confirmation flipper lenses, diameter up to request:
cylinder shpere
+/- 0.25, 0.50, 0.75, 1.00, 1.50, 2.00.
+/- 0.25, 0.50, 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00.
round prism, ocluder, maddox,porarized, cross cylinder and etc.
