52744 ⎘
Producing optical elements, e.g. lenses or prisms; Production of simple or compound lenses; Production of contact lenses; Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere; Curing of the contact lens material; Differential curing, e.g. by differential radiation Movable masks or shutters, e.g. to vary the exposure