Novartis Ag

Norbert Doerr

Alfred Fischer

Robert Carey Tucker

Michael Hugh Quinn

Barry L Atkins

Roland Schmieder

Peter Brotzmann

Stefan Schmittner

A process for the automatic manufacturing of different toric optical lenses having a front surface and a rear surface having a predetermined rotational orientation relative to one another, and with at least one of the front and rear surfaces having a toric portion, comprises forming a first toric lens by: The process further comprises subsequently forming a second toric lens different from the first toric contact lens using the same male and female mold halves () by

Process and apparatus for the automatic manufacturing of different toric optical lenses

A method comprises the steps of (a) providing a water based ink in at least one clich&#xe9; with a contact lens pattern; (b) transferring the water based ink from the clich&#xe9; to at least a surface of at least a contact lens forming mold by means of at least a transfer pad; (c) at least partially curing the ink transferred on the mold to form a colored film; (d) dispensing a hydrogel lens-forming material into a lens-forming cavity of the mold; and (e) curing the lens-forming material within the lens-forming cavity to form the contact lens, whereby the colored film detaches from the molding surface and becomes integral with the body of the contact lens; characterized in that the relative air humidity in the immediate vicinities of the transfer pad/s is kept higher than 50% at standard temperature and pressure conditions during ink transfer.

Pad transfer printing method for making colored contact lenses

Growing community of inventors

Griesheim, Germany

Norbert Doerr