The need for greater precision in grinding never decreases, nor does the need to grind more materials to higher standards of precision. Take, for example, Sinjin Diamond – a South Korean producer of ultra-precision diamond cutting tools used to produce eyeglasses and contact lenses:  To produce those diamond-tipped profile cutters, Sinjin is counting on the precision of the Vollmer QXD 200 eroding machine.

The profile cutters are mainly used to machine glass or plastic lenses for glasses.

The history of producing corrective lenses is long, and still evolving: about half the world’s population may be affected by vision impairment or eye diseases. The best-known treatments are vision aids, such as glasses and contact lenses, made from glass or plastic. Glasses were invented in Italy in the 13th century, even though the ancient Egyptians knew the recipe for glass around 5000 years ago: Sand, ash, and chalk.

Two Germans, Adolf Eugen Fick and August Müller, working independently, created glass contact lenses, around 1880. However, contact lenses only really made a breakthrough in the mid-20th century, once high-quality synthetics such as acrylic glass could be used to produce them.