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Sustainable development: Neptune, the n° 1 environmentally-friendly filtering system for opticians
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Energy consumption

In many countries today, most of the opticians have an edger.
This machine is used by opticians to process the ophthalmic lenses they receive from manufacturers, grinding them to fit their customers' frames. This is done by abrasion using diamond wheels.
Edging will only be successful if water is kept constantly running on to the grinding wheels. This water fulfils two purposes:
  • cooling the wheels.
  • washing away the chips and small particles produced by the grinding.
The chips are caught in a screen and the particles remain in suspension in the water. They are then usually disposed of either directly in the waste water network or left in a decanting tank that will then be similarly emptied into the waste water network.

For example: in 2009 in France, 35 million spectacle lenses were sold, each edged lens generating 13g - 15 g of particles: every year, between 455 and 525 tonnes of particles end up in sewage works and over 680,000 m3 of drinking water are poured off into the drains.