Intraocular lens

Details Intraocular lens Intraocular lens

2002-07-01

2004-03-02

McDermott, Corrine (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Eye prosthesis

Intraocular lens

C623S006420

Reexamination Certificate

active

06699284

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an intraocular lens which is placed in an anterior chamber of a patient's eye.
2. Description of Related Art
There has been known an intraocular lens (anterior chamber intraocular lens) which is placed in an anterior chamber of a patient's eye for cataract treatment or refraction. As this type of intraocular lens to be placed in an anterior chamber, intraocular lenses shown in
FIGS. 5A and 5B
have been known. An intraocular lens
40
in
FIG. 5A
is constructed of a lens part (optical part)
41
having a predetermined refractive power and two support parts
42
extending from an edge of the lens part
41
. An end of each support part
42
has a cut of a predetermined length to thereby pinch part of a peripheral area
21
a
which exerts no influence upon the motion of an iris
21
, thereby holding the lens part
41
in the anterior chamber. On the other hand, an intraocular lens
50
in
FIG. 5B
is constructed of a lens part (optical part)
51
and four support parts
52
extending from an edge of the lens part
51
. Each end of the support parts
52
is inserted to penetrate a peripheral area
21
a
of an iris
21
to hold the lens part
51
in the anterior chamber.
However, the intraocular lens
40
with the support parts
42
pinching the part
21
a
could not be securely held and may become detached from the iris
21
. In the intraocular lens
50
, each end of the support parts
52
penetrating the iris
21
is positioned on a fundus side of the iris
21
. Accordingly, the ends of those support parts
52
may contact a crystalline lens in the case of a phakic eye.
SUMMARY OF THE INVENTION
The present invention has been made in view of the above circumstances and has an object to overcome the above problems and to provide an intraocular lens which is easy to place in an anterior chamber without becoming detached therefrom and includes an end of a support part that does not contact a crystalline lens of a phakic eye.
Additional objects and advantages of the invention will be set forth in part in the description which follows and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve the purpose of the invention, there is provided an intraocular lens to be placed in an anterior chamber of a patient's eye, including: a lens part with a predetermined refractive power, including a front lens surface facing toward a cornea side and a back lens surface facing toward a fundus side when the intraocular lens is placed in the anterior chamber; a support part provided in an edge of the lens part and with an end positioned opposite to the edge, the end being insertable into an iris to penetrate to a fundus side thereof and back to a cornea side thereof to hold the lens part in the anterior chamber; and a hook provided in the end of the support part for preventing the support part from coming off the iris.


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patent: 5628796 (1997-05-01), Suzuki
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patent: WO 97/27825 (1997-08-01), None
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patent: WO-99/62434 (1999-12-01), None
patent: WO 00/66039 (2000-11-01), None
patent: WO 01/50984 (2001-07-01), None
patent: WO-01/50984 (2001-07-01), None

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