Hydrophilic contact lens case

• US 4,122,942 A
• Filed: 07/21/1975
• Issued: 10/31/1978
• Est. Priority Date: 01/31/1974
• Status: Expired due to Term

• Current Assignee: Leonard G. Wolfson
• Original Assignee: Leonard G. Wolfson
• Inventors: Wolfson, Leonard G.
• Primary Examiner(s): Hart, Ro E.
• Application Number:
  US05/597,591
• Time in Patent Office: 1,198 Days
• Field of Search: 206/5.1, 206/205, 206/213.1, 351/160 H, 351/166
• US Class Current: 206/5.1
• CPC Class Codes: A45C 11/005 Contact lens cases A45C11/046 takes precedence

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.

Claims

1. 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.

2. 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.

3. Method as defined in claim 2 including the step of releasibly sealing said well with a removable cap, said cap being dimensioned to fit over said well.