Contact lens package with reduced head space

摘要

The packages described by this invention all have reduced “head space,” that is, the distance from lid to lens. Packages contain dimples to achieve this reduced head space. Specifically, packages are designed with dimple sag equal to or less than 1.90-mm, or volume displaced equal to or less than 360 μl. Combined with the existing primary packaging, it has been found that such conditions provide for reduction in folded lens rate during shipping and handling. As well, lenses stored or having an extended time in low head space packages in a “foil down” orientation now have characteristics closer lenses stored in a “foil up orientation.”

主权项

1. A lens package, comprising:
a bulb having a rim and comprising a volume; a generally thin cover placed over said bulb, said cover having a generally flat configuration; a contact lens contained in solution in said bulb; such that said cover is sealed to said bulb at said rim, and said cover formed from a generally flexible material, such that when said cover is sealed to said bulb, a dimple is formed in said cover, said dimple having a concavity defining a sag depth, such that the concavity displaces volume from the volume of the bulb.