Cast mould for manufacturing contact lenses or intraocular lenses
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United States of America Patent
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Jan 12, 2021
Grant Date -
Jun 14, 2018
app pub date -
Feb 7, 2018
filing date -
Jun 9, 2011
priority date (Note) -
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Abstract
A cast mould for manufacturing a contact lens or an intraocular lens, wherein the cast mould is provided with a central part and a bearing ring and a flexible connection between the central part and the bearing ring. Further, an injection mould is provided for manufacturing such a cast mould and a method for manufacturing such a cast mould. The injection mould is provided with a mould cavity with a plunger biased by spring means towards the mould cavity which serves for compensating shrinkage which occurs during the curing of the plastic injected into the injection mould. Also described is a method for manufacturing a contact lens or intraocular lens with the aid of the cast mould, as well as a contact lens or intraocular lens obtained with this method.
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