Duo packaging for disposable soft contact lenses using a substrate
A contact lens package includes a substrate, a first sheet removably sealed to one side of the substrate, and a second sheet sealed to the other side of the substrate with a contact lens contained between the first and second sheets.
1. A contact lens package, comprising:
a substrate having a top surface, a bottom surface, and an inner wall defining an orifice;
a first non-transmissive sheet removably sealed to said top surface of said substrate over said defined orifice;
a second non-transmissive sheet sealed to said bottom surface of said substrate over said orifice, defining a hermetically sealed cavity; and
a contact lens and a hydration medium each disposed in said hermetically sealed cavity between said first and second sheet;
wherein said substrate includes a first non-leaching barrier material and a second material;
wherein said first non-leaching barrier material is formed on said substrate inner wall.
2. The contact lens package of claim 1 , wherein said substrate comprises a first portion and a second portion;
said first portion entirely defining a substrate portion of said cavity containing said contact lens; and
wherein said first portion of said substrate is formed entirely of said non-leaching barrier material.
3. The contact lens package of claim 2 , wherein said first portion of said substrate defines a hermetic barrier layer between said contact lens and said second portion of said substrate when said contact lens is disposed in said orifice;
wherein said second portion of said substrate comprises a different material than said first portion of said substrate.
4. The contact lens package of claim 3 , wherein said first non-leaching barrier material comprises a homopolymer polypropylene.
5. The contact lens package of claim 3 , wherein said hermetic barrier layer of said first non-leaching barrier material is at least 50 microns thick.
6. The contact lens package of claim 3 , wherein said hermetic barrier layer of said first non-leaching barrier material is between 75 microns and 250 microns thick.
7. The contact lens package of claim 2 , wherein said package is autoclaved to terminal sterility.
8. The contact lens package of claim 2 , wherein said first portion of said substrate and said second portion of said substrate are formed as separate injections of a two-shot mould.
9. The contact lens package of claim 2 , further comprising a positioning member disposed in said hermetically sealed cavity with said contact lens.
10. The contact lens package of claim 1 , wherein said first non-transmissive sheet and said second non-transmissive sheet each comprise multi-layer laminate foils.