Method for avoiding entrapment of air bubbles in a lens forming material and apparatus for carrying out the method

An apparatus for avoiding entrapment of air bubbles (5) in a lens forming material (4) in an ophthalmic lens manufacturing process, the apparatus comprising a stamp (6) and a carrier for at least one mold half (2;

• 3), said stamp (6) and said carrier being arranged relative to each other in a manner such that said stamp (6) faces a predetermined portion of a lens forming surface (21;
• 31) of said at least one mold half (2;
• 3), wherein said stamp (6) is made of a material which is sufficiently far away in the triboelectric series from the material said at least one mold half (2;
• 3) is made of, and wherein said stamp (6) and said carrier of said at least one mold half (2;
• 3) are movable towards and away from one another in a manner to allow said stamp (6) to contact said predetermined portion of said lens forming surface (21;
• 31) of said at least one mold half (2;
• 3) for a predetermined time period to provide said charges on said predetermined portion of said lens forming surface (21;
• 31) of said at least one mold half (2;
• 3).