METHOD OF MAKING CONTACT LENSES Russian patent published in 2013 - IPC G02C7/04 B29D11/00 

FIELD: physics.

SUBSTANCE: method of making contact lenses includes a step of feeding a liquid composition into a mould designed to make contact lenses, wherein, according to the invention, the liquid composition contains a lens-forming material and a phospholipid, wherein the lens-forming material is cross-linkable and/or a polymerisable with actinic radiation or by heating. Said method also includes a step of cross-linking/polymerising the lens-forming material in the mould to form a lens having a polymer matrix, where at least a portion of the phospholipid moves to the phase boundary between the mould and the polymer matrix of the formed lens, and a step of separating the mould, where the phospholipid is contained in an amount which is sufficient to reduce the averaged force of separating the mould by at least 40% compared to a case when there are no phospholipids.

EFFECT: making contact lenses while ensuring high quality thereof and high output, which is provided owing to easy separation of the mould and extraction of lenses from the mould during injection moulding thereof.

23 cl