Note: Descriptions are shown in the official language in which they were submitted.
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CONTACT LENS PACKAGE AND APPLICATOR
WITH METHOD FOR ITS USE
Related Applications
This application is a non-provisional filing of U.S. Serial No. 60/667,138,
filed on March 31, 2005, a provisional patent application.
Field of Invention
The present invention relates to packages for the storage and
shipping of contact lenses. More particularly, the present invention relates
to
packages having an internal drainage system that allows separation of the
saline solution from the contact lens at the time that the lens is removed
from
the package and to packages that may be used as contact lens applicators.
Background of the Invention
Soft contact lenses have become increasingly popular since they
were first introduced in the 1970's. Due to progressive reductions in
manufacturing costs, soft contact lenses are now an attractive and economical
choice for the consuming public. Such lenses may be frequently replaced by
the consumers (e.g., on a daily or weekly basis) and do not need to be cleaned
or sterilized as often as traditional contact lenses. Of course, the consumer
desires to keep a supply of lenses on hand that is commensurate with the
frequency with which the lenses are replaced. Therefore, consumer demand for
disposable contact lenses has led to a need for disposable packages that are
easy to use and inexpensive. The packages should be constructed to provide
safe storage and shipping for the lenses. It is also desirable that the
individual
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packages be as small as possible, so that they may be easily and unobtrusively
stored and carried.
Contact lenses typically are packaged and stored in a hydrated
state, which requires that they be sealed in packages with a storage solution.
One widely-used contact lens package is the "blister pack", which, in general,
comprises a rigid plastic container having a flat upper surface with a concave-
shaped well that contains a single contact lens with a quantity of storage
solution. The well is covered with a flexible cover that is sealed along the
perimeter of the upper surface. The blister packs are boxed for shipping and
storage until a lens is needed by a consumer. The consumer then peels back
the flexible cover from the blister pack to expose the contact lens. The
consumer then pours the contact lens out into his hand, together with the
saline
solution, and places the lens on the tip of his finger for application to the
eye.
A need remains for contact lens packaging systems that include a
saline solution for storage and shipping of the contact lenses, but allow the
saline solution to be separated from the lens at the time that the lens is
removed from the package so that the consumer does not need to handle or
otherwise come into contact with the saline solution. A need also remains for
contact lens packaging systems that enable the consumer to apply the contact
lens directly to the eye, without the need to touch the lens with the fingers.
Summary of Invention
A contact lens package according to one aspect of the present
invention comprises a container with a lens cup and a lid that covers the lens
cup to form a chamber sized and shaped to contain a contact lens, and a
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handle for manipulating the contact lens package between a first orientation
in
which the chamber is substantially filled with liquid, such as saline
solution, and
a second orientation in which the chamber is substantially empty of liquid.
Preferably, the lens cup has a drainage member through which the liquid drains
into a second chamber in the contact lens package. The drainage member
preferably includes a mesh or a plastic sheet having perforations
therethrough.
The handle and container are symmetrical about a common longitudinal axis
and the handle, preferably, is substantially conical in shape with ridges on
its
exterior. The handle is sized so that a consumer may grasp it between his or
her fingers.
A contact lens applicator according to another aspect of the
present invention comprises a container including a lens cup and a lid
covering
the lens cup so as to form a chamber sized and shaped to contain a contact
lens and a handle for manipulating the contact lens applicator. The lid is
movable between a closed position in which the contact lens is concealed and
an open position in which the contact lens is accessible for direct
application of
the contact lens to the user's eye. Preferably, the lens cup is sized and
shaped
to hold the contact lens so that a peripheral portion of the lens is exposed
outside of the lens cup when the lid is in its open position.
Brief Description of the Drawings
For a more complete understanding of the present invention,
reference is made to the following detailed description of the present
invention
considered in conjunction with the accompanying drawings, in which:
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FIG. 1 is a cross-sectional view of an embodiment of a contact
lens package according to the present invention in which the contact lens
package is sealed for shipping and storage.
FIG. 2 is a cross-sectional view of the contact lens package of
FIG. 1.
FIG. 3 is a perspective view of the contact lens package of FIG. 1
in an upright and opened state.
FIG. 4 is a cross-sectional view of the contact lens package of
FIG. 3.
Detailed Description of the Invention
A preferred embodiment of a contact lens package 2 according to
the present invention is shown in FIGS. 1-4. Referring to FIG.1, a contact
lens
package 2 has a contact lens container 4 and a handle 6 that is mated to the
contact lens container 4. The contact lens container 4 includes a shell 8 and
a
lid 10 that is hingedly attached to the shell 8 by a hinge 12.
Referring now to FIG. 2, the shell 8 includes an interior cavity 14
having a rim 16. A drainage member 18, such as a mesh or a perforated
plastic sheet, is secured within the interior cavity 14 so as to define a
first
chamber 20 within the interior cavity 14 and a lens cup 22 that is formed from
the drainage member 18, the rim 16 of the shell 8 and the portion 24 of the
shell 8 that is between the drainage member 18 and the rim 16. The lens cup
22 is sized and shaped to hold a single contact lens 26 so that the peripheral
edge 28 of the contact lens 26 extends beyond the rim 16 (see FIG. 3). The lid
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has a rim 30 that is sized and shaped to fit closely against the rim 16 of the
shell 8, so that the lid 10 and the lens cup 22 form a second chamber 32 that
sized and shaped to contain the contact lens 26. A sealing strip 34 is
removably attached to the contact lens container 4 so as to secure the shell 8
5 and the lid 10 to one another and to form a liquid-tight seal where the
shell 8
contacts the lid 10. Preferably, the second chamber 32 is smaller in volume
than the first chamber 20, which is sized to receive a quantity of saline
solution
36. Still referring to FIG. 2, the handle 6 is fabricated as a hollow conical
piece
with an open end 38. The contact lens container 4 is provided with a plug 40
at
10 the end 42 of the contact lens container 4 opposite the lid 10. The plug 40
is
sized and shaped to form a friction fit when inserted into the open end 38 of
the
handle 6, thereby securing the contact lens container 4 to the handle 6.
The contact lens package 2 is shipped or stored with the handle 6
uppermost, as shown in FIGS. 1 and 2, with the contact lens 26 fully
submerged in the saline solution 36 in the second chamber 32. The consumer
flips the contact lens package 2 over so that the lid 10 is uppermost, as
shown
in FIGS. 3 and 4, allowing the saline solution 36 to drain through the
drainage
member 18 into the chamber 14. The consumer then pulls away the sealing
strip 34, releasing the lid 10 (see FIGS. 3 and 4) and providing access to the
contact lens 26. Because the peripheral edge 28 of the contact lens 26
extends beyond the rim 16 of the shell 8, the consumer can use the contact
lens package 2 as an applicator to transfer the contact lens 26 directly to
the
eye, rather than transferring the contact lens 26 with a finger. The handle 6
may be provided with ridges 44 so that the consumer may securely grip the
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handle 6 while manipulating the contact lens package 2 and transferring the
contact lens 26 to the eye.
The drainage of the saline solution 36 into the first chamber 20
should leave the contact lens 26 free of the saline solution 36. Therefore, it
is
preferable that the drainage member 18 be arranged to allow rapid and
complete drainage of the saline solution 26 from the lens cup 22 into the
chamber 20. The drainage member 18, therefore, is preferably an open mesh,
as in FIG. 4, although, as an alternative, a perforated sheet of a hydrophobic
plastic material may be used, as in FIG. 4.
The contact lens package 2 of the present invention can be
fabricated to have a lens cup 22 with a diameter of about 2-3 cm, with its
minimum dimension limited only by the size of the contact lens to be stored.
Similarly, the minimum volume of the chamber 20 is limited only by the volume
of saline solution 36 to be provided. For easy handling, the overall length of
the
contact lens package 2 may be about 6-10 cm. The resulting small overall size
of the contact lens package 2 allows it to be easily and unobtrusively
carried.
The contact lens package 2 may be styled to provide the same look and feel as
a common item of about the same size, such as a cologne bottle
It will be understood that the embodiment described herein is
merely exemplary and that a person skilled in the art may make many
variations and modifications without departing from the spirit and scope of
the
present invention. For example, the handle 6 and shell 8 may be fabricated as
a single piece with the shell 8 being open to the interior of the handle 6. In
another example, the contact lens container 4 may be secured to the handle 6
by means other than a plug. The lid 10 need not be secured to the shell 8 by a
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sealing strip 34, but could be friction-fit to the shell 8. Alternatively, the
shell 8
and lid 10 could be threaded so as to screw-fit with each other. All such
variations and modifications, including those discussed within the detailed
description, are intended to be included within the scope of the present
invention.
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