Packaging for disposable soft contact lenses
The present disclosure provides a contact lens package containing a contact lens in a compressed state. In one exemplary embodiment, the overall internal depth of the package is less than the natural sagittal depth of the contact lens. Different single-use contact lens package shapes and configurations may be used. In some embodiments, a spring disc is included in the packages to help present the contact lens to the user when the package is opened. The contact lens packages may be adhered or clipped to a card or other carrier sheet, and may be housed in a number of different secondary packages.
1. A contact lens package comprising:
a first flexible substrate;
a soft unused contact lens having a first and a second side, wherein said first side of said unused contact lens is placed on said first flexible substrate;
a second flexible substrate coupled to said first substrate such that said second flexible substrate faces said second side of said unused contact lens;
said unused contact lens hermetically sealed via a peelable seal on at least three sides between said first substrate and said second substrate, said hermetic seal being configured to withstand a pressure associated with autoclaving said package to terminal sterility;
a buffer fluid sealed between said first flexible substrate and said second flexible substrate, wherein said buffer fluid is free flowing within said package and contacts said unused contact lens;
wherein said first flexible substrate and said second flexible substrate are each less than 0.5 mm thick and neither said first flexible substrate nor said second flexible substrate is preformed; and
wherein said package containing said unused contact lens is a retort package; wherein the substrate are sealed in an area surrounding said contacts lens, said seal being formed in a point on a first side of the package to facilitate a predictable initial opening force used to separate said substrates; and
wherein said package is free of additional internal structural objects.
2. The package of claim 1 , wherein both said first and second substrates are substantially flat or planar.
3. The package of claim 1 , further comprising a seal around a perimeter of the package, wherein the seal in the area surrounding the contact lens is stronger than the seal around the perimeter of the package.
4. The package of claim 1 , wherein at least a portion of at least one of said flexible substrates extends beyond said seal to form a griping flap.
5. The package of claim 1 , wherein at least one of the substrates comprises polyolefin.
6. The package of claim 1 , wherein at least one of the substrates comprises aluminum.
7. The package of claim 1 , wherein at least one of said substrates is multi-layer laminate.
8. The package of claim 7 , wherein the multi-layer laminate comprises one or more materials selected from the group consisting of polyethylene terepthelate, polypropylene, and aluminum.
9. The package of claim 7 , wherein both of said substrates are multi-layer laminates.
10. The package of claim 1 , wherein said buffer fluid further comprises a hydration medium.
11. The package of claim 1 , wherein at least one of the substrates is transparent.
12. The package of claim 1 , wherein at least one surface of at least one of the substrates is colored, the color being displayed inwardly toward the contact lens when the package is in a sealed state so that the contact lens may be viewed against the color substrate when the package is opened.
13. The package of claim 1 , wherein said contact lens is deformed from an equilibrated state when sealed between said substrates.
14. The package of claim 13 , wherein said lens is compressed when sealed between said substrates.
15. The package of claim 1 , wherein the contact lens is confined in the package such that the lens is always maintained in a same orientation while inside the package.
16. The package of claim 1 , wherein the entire package, when sealed, is flexible without damaging the contact lens.
17. The package of claim 1 , wherein packages for a number of contact lenses, each individually sealed between said first and said second flexible substrates, are each connected to an adjacent package via a frangible connection.
18. The package of claim 1 , wherein said first and second substrates comprise a single sheet of flexible material folded to provide said first and second substrates on either side of said lens.
19. The contact lens package of claim 1 , wherein said buffer fluid surrounds the contact lens.
20. The contact lens package of claim 1 , wherein said contact lens floats in said buffer fluid.
21. The contact lens package of claim 19 , wherein said contact lens and said buffer fluid occupy substantially all of an area between said first flexible substrate and said second flexible substrate.
22. The contact lens package of claim 19 , wherein said buffer fluid supports said contact lens away from said first flexible substrate and said second flexible substrate.
23. The contact lens package of claim 1 , wherein said first flexible substrate and said second flexible substrate are configured to be peeled apart to open said retort package.
24. A pliable retort package for a soft unused contact lens including an internal space formed between a first flexible substrate and a second flexible substrate, said first flexible substrate and said second flexible substrate being peelably sealed together on at least three sides, wherein the substrate are sealed in an area surrounding said contact lens, said seal being formed in a point on a first side of the package to facilitate a predictable initial opening force used to separate said substrates, said internal space holding a soft unused contact lens and a free flowing hydration medium for maintaining the hydration of said soft unused lens, wherein said entire package when sealed is pliable without damage to said package or said soft unused contact lens and is configured to maintain said seal on at least three sides when said pliable retort package is autoclaved to terminal sterility;
wherein said pliable retort package is free of additional internal structural .
25. A method of packaging a contact lens comprising:
providing a first flexible substrate;
disposing a soft unused contact lens having a first side and a second side on said first flexible substrate;
disposing a hydration medium onto said soft unused contact lens on said first flexible substrate;
heat sealing said first flexible substrate to a second flexible substrate to hermetically seal said soft unused contact lens between said flexible substrates, wherein said seal between said first flexible substrate and said second flexible substrate is a peelable seal on at least three sides that defines a retort-type single use pack configured to withstand being autoclaved to terminal sterility wherein the substrate are sealed in an area surrounding said contact lens, said seal being formed in a point on a first side of the package to facilitate a predictable initial opening force used to separate said substrates; and
wherein said retort type single use pack is free of additional internal structural objects.
26. The method of claim 25 , further comprising folding a flexible sheet of material over itself to provide said first and second flexible substrates on either side of said contact lens.
27. The method of claim 25 , further comprising deforming said contact lens from an equilibrated state when said lens is sealed between said first and second substrates.