Back to results
US 4,122,942 AGranted
Hydrophilic contact lens case
OwnerLeonard G. Wolfsoninventor
Life of this patent
Estimating the term…
Abstract
A hydrophilic contact lens with at least the surfaces formed of a high molecular weight synthetic polymer, is treated by exposure to a plasma of an inert gas under near-vacuum conditions. The treated lenses are stored in aqueous solution held in a plastic storage case, at least the interior surfaces of the storage case having also been treated with the inert gas plasma to also render its interior surfaces hydrophilic.
Claims3
A storage case for hydrophilic contact lenses, said cases comprising;
- a well formed of high molecular weight synthetic polymeric material substantially softer than the material of said lens, and having a sealable cap dimensioned to fit over said well, the interior surface of said well having been treated by exposure to a plasma of an inert gas at a pressure substantially below atmospheric until said interior surfaces have been rendered hydrophilic.
A method of storing hydrophilic contact lenses said method comprising the steps of:
- forming a well with an interior surface of a high molecular weight synthetic polymeric material, said material being substantially softer than the material of said lens,
- exposing at least the interior surface of said well to a plasma of an inert gas at pressures substantially below atmospheric until said interior surface has been rendered hydrophilic, and
- placing said lenses and an aqueous storage solution in said well.
Dependencies are inferred from the claim text.