Contact lens blister packages and methods for automated inspection of hydrated contact lenses
AssigneeCooperVision International Holding Company, LP
InventorsJulie Clements, Steve Hope, Kevin Aldridge
Life of this patent
Estimating the term…
Abstract
A contact lens package includes a base member including a cavity dimensioned to accommodate contact lens and a liquid therein. The combination of the cavity, the contact lens, and the liquid cooperate to collimate partially collimated light directed toward a bottom surface of the cavity. The cavity can be sealed by attaching a removable sealing member to the base member around the cavity. Methods of inspecting ophthalmic lenses using the present packages are also described.
Claims46
A contact lens blister package, comprising:
- a thermosplastic base member comprising a light collimation cavity having a liquid and a contact lens present in the light collimation cavity, and a flange extending outwardly from the light collimation cavity, the flange including a sealing area to which a sealing member can be attached to seal the contact lens and the liquid in the cavity;
- wherein the light collimation cavity comprises a bottom surface having a bottom surface perimeter, and an upwardly extending cavity sidewall surface extending form the bottom surface perimeter to an upper perimeter cavity edge defining a light collimation cavity perimeter, and
- wherein the light collimation cavity perimeter is greater than the bottom surface perimeter;
- and wherein the light collimation cavity bottom surface has a radius of curvature at least 200% larger than a base curve of the contact lens.
A contact lens blister package, comprising:
- a thermosplastic base member comprising a liquid and a contact lens located in a light collimation cavity defined by a bottom wall surface having a perimeter, and a sidewall surface extending from the bottom wall surface perimeter upwardly toward a flange extending outwardly from the cavity,
- wherein the cavity has a maximum length of about 25 mm and a maximum width of about 20 mm, and the bottom wall surface has a radius of curvature of at least 200% larger than a base curve of the contact lens.
A contact lens blister package, comprising a thermoplastic base member having a length and a width, the base member comprising:
- only one cavity to retain a liquid composition, the only one cavity being noncircular, having a bottom wall surface and a sidewall surface extending perimetrically from the bottom wall surface;
- a liquid and a contact lens in the cavity;
- and
- a flange outwardly extending from the only one cavity,
- wherein the bottom wall surface has a radius of curvature from about 15 mm to about 26 mm along the length of the base member and along the width of the base member, and wherein the radius of curvature is about 200% greater than a base curve of the contact lens, and the bottom wall surface is configured to collimate light.
The contact lens blister package 37, further comprising a support rib depending from the flange and spaced apart from the cavity.
A method of inspecting a hydrated contact lens, comprising:
- providing a contact lens in a liquid present in a light collimation cavity of a contact lens blister package, wherein the light collimation cavity has a bottom wall surface having a radius of curvature from about 15 mm to about 26 mm along a length of the cavity and along a width of the cavity;
- directing partially collimated light through the light collimation cavity, and liquid and contact lens provided therein, to produce fully collimated light;
- and
- obtaining a bright field image of the contact lens using a camera receiving the fully collimated light.
Dependencies are inferred from the claim text.