Intraocular lens insertion device
There is provided an intraocular lens insertion device capable of easily positioning a circumference of an optical portion of an intraocular lens with respect to a distal end of a plunger. An intraocular lens insertion device 1 comprises: a cartridge 3 having a lens placement section 16 in which an intraocular lens 2 is to be placed; an insertion device main body 4 having a plunger 5 for pushing out the intraocular lens 2 with the cartridge 3 being attached to the insertion device main body 4 ; and a deforming means 6 for deforming the lens placement section 16 . A slit 21 is formed on the lens placement section 16 , and the deforming means 6 deforms the lens placement section 16 in a diameter-decreasing direction thereof when attaching the cartridge 3 to the insertion device main body 4 . In this way, the intraocular lens 2 is settled at a predetermined position in the lens placement section 16 , thus making it possible to position a circumference of an optical portion 2 a of the intraocular lens 2 with respect to a distal end portion of the plunger 5.
1. An intraocular lens insertion device including:
a cartridge having a nozzle section and a deformable lens placement section, that is deformable relative to the nozzle section, in which an intraocular lens is to be placed;
an insertion device main body to which said cartridge is attached so that said intraocular lens is pushed out by a plunger along a lens advancement axis and released from the nozzle section of said cartridge to the outside; and
deforming means for deforming said deformable lens placement section when said cartridge is in contact with said insertion device main body and is being inserted into said insertion device main body, thereby positioning said intraocular lens in said lens placement section.
2. The intraocular lens insertion device according to claim 1 ,
wherein said deforming means comprises:
an abutting surface provided on said insertion device main body; and
an abutted surface provided on an outer circumference of said cartridge, and
wherein said abutting surface is provided on an attaching portion for fixing said cartridge to said insertion device main body, such that said abutting surface is allowed to push against said abutted surface when said cartridge is fixed to said attaching portion, thereby deforming said lens placement section.
3. The intraocular lens insertion device according to claim 2 , wherein a slit is provided on said lens placement section.
4. The intraocular lens insertion device according to claim 1 , wherein a slit is provided on said lens placement section.
5. An intraocular lens insertion device, comprising:
an insertion device main body including a cartridge attaching portion;
a plunger that is movable through the insertion device main body; and
a removable cartridge defining a lens advancement axis and including a cartridge main body, a nozzle section, and a lens placement section within the cartridge main body;
wherein the respective configurations of the cartridge attaching portion and the cartridge main body are such that at least a portion of the lens placement section will be compressed by the cartridge attaching portion, in a direction transverse to the lens advancement access, by the insertion device main body as the removable cartridge is being attached to the cartridge attaching portion.
6. An intraocular lens insertion device as claimed in claim 5 , wherein
the insertion device main body defines a longitudinal axis;
the cartridge attaching portion includes first and second abutting surfaces that are located on opposite sides of the longitudinal axis and are separated, in a direction perpendicular to the longitudinal axis, by a first distance; and
the cartridge main body includes first and second exterior surfaces that are aligned with the lens placement section and are located such they will be in contact with the abutting surfaces when the removable cartridge is attached to the cartridge attaching portion, the first and second exterior surfaces being separated from one another, in a direction perpendicular to the lens advancement axis, by a second distance that is greater than the first distance when the lens placement section is in an uncompressed state.
7. An intraocular lens insertion device as claimed in claim 6 , wherein
the cartridge main body defines a circumference about the lens advancement axis; and
the cartridge main body includes first and second slots that are coextensive with at least a portion of the lens placement section and are circumferentially offset from the first and second exterior surfaces.
8. An intraocular lens insertion device as claimed in claim 7 , wherein
the first and second slots are circumferentially offset from the first and second exterior surfaces by about 90 degrees.
9. An intraocular lens insertion device as claimed in claim 5 , wherein
the cartridge main body includes a transition section between the nozzle section and the lens placement section.
10. An intraocular lens insertion device as claimed in claim 5 , wherein
the cartridge main body includes first and second slots that are coextensive with at least a portion of the lens placement section.
11. An intraocular lens insertion device as claimed in claim 5 , wherein
the cartridge main body includes first and second wing portions; and
the cartridge attaching portion includes first and second grooves configured to receive the first and second wing portions as the removable cartridge is being attached to the cartridge attaching portion.
12. An intraocular lens insertion device as claimed in claim 5 , wherein
the lens placement section defines first and second curved surfaces that face one another and first and second linear surfaces therebetween; and
the configuration of the removable cartridge is such that the first and second curved surfaces move toward one another as the lens placement section is compressed.