METHOD FOR PRODUCING SILICONE HYDROGEL CONTACT LENSES
The invention provides a contact lens manufacturing method comprising a process for removing unprocessed molded silicone hydrogel contact lenses from mold halves in a relatively efficient and consistent manner. A method of the invention comprising the steps of formulating a lens formulation by disso...
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Format: | Patent |
Sprache: | eng ; hun |
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Zusammenfassung: | The invention provides a contact lens manufacturing method comprising a process for removing unprocessed molded silicone hydrogel contact lenses from mold halves in a relatively efficient and consistent manner. A method of the invention comprising the steps of formulating a lens formulation by dissolving/blending all polymerizable components in a mixture a hydrophobic acrylic monomer as a reactive diluent and an organic solvent as a non-reactive diluent at a weight ratio of least 0.24 (reactive diluent over the sum of reactive and non-reactive solvents) per gram of the polymerizable composition and using a relatively low ultrasonic vibration energy for delensing. This method of the invention can be easily implemented in a production environment for enhancing the production yield. |
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