Assembly for pressing against each other two ophthalmic lenses in order to build an electrochromic cell

An assembly comprising:

• a first ophthalmic lens having a first internal face and a first external face;
• a second ophthalmic lens having a second internal face and a second external face, said second ophthalmic lens being superposed on said first ophthalmic lens;
• a pressing device, adapted to contact one of said first and second ophthalmic lenses in a contact area and to press said first and second ophthalmic lenses against each other in order to build an electrochromic cell comprising a cavity delimited by said first and second internal faces;
• an adhesive substance applied on at least one predetermined point of at least one of said first and second internal faces in order to seal said cavity;
• and
• a holder provided with a vacuum propagating element enabling said holder to grip one of said first and second external faces,
• said contact area being located in a central area of said first and second ophthalmic lenses and said holder comprising a tubular rod and said pressing device comprising a cup arranged at an end of said tubular rod, said cup having a central hole, said tubular rod and said central hole forming a duct for propagating said vacuum.