Device for processing optical workpieces, particularly spectacle lenses

A device for processing optical workpieces, comprising a work chamber, which is accessible from outside by way of a selectably closable opening and in which a workpiece mount and at least one tool mount are arranged opposite one another and movable relative to one another so that a processing region of a tool held at a first tool mount of the at least one tool mounts can be brought into processing engagement with a workpiece held at the workpiece mount and can be guided over the workpiece in the processing engagement, wherein for recognition of wear at the tool a sensor equipment with at least one contactlessly operating sensor arrangement is provided outside the work chamber and arranged to be movable from a protected rest position to a detecting position and conversely, and the sensor equipment is constructed to detect by the sensor arrangement in the detecting position via the opened opening of the work chamber at the processing region of the tool held at the first tool mount an unacceptable deviation of the processing region from a desired geometry beyond a predetermined amount.