Method for sterilizing contact lenses
AssigneeIndustrie Ottiche Riunite S.p.A.
InventorStefania Leopardi
Life of this patent
Estimating the term…
Abstract
A method and apparatus for sterilization of contact lenses characterized in that the lenses are enclosed in the interior of a sealtight chamber having rigid and indeformable walls, the following sequence of steps being performed: (a) introducing in said chamber a carbon dioxide stream; (b) producing a vacuum in the interior of said chamber, and (c) filling said chamber with carbon dioxide until a preselected pressure is attained.
Claims8
A method of sterilizing contact lenses characterized in that it comprises the steps of introducing said lenses in the interior of a sealtight chamber having rigid and undeformable walls, the following sequence of steps being performed:
- (a) introducing in said chamber a carbon dioxide stream to establish therein a predetermined superatmospheric pressure;
- (b) producing a vacuum in the interior of said chamber, and
- (c) filling said chamber with carbon dioxide until a preselected superatmospheric pressure value is attained, said preselected pressure value being maintained for a period of time to affect sterilization of said lenses.
Dependencies are inferred from the claim text.