Intraocular lens insertion devices and methods
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. A method of positioning an intraocular lens that has been placed within a lens placement section of a removable cartridge, the lens placement section including an inner surface, the method comprising the steps of:
compressing the lens placement section of the removable cartridge with a portion of an insertion device main body such that portions of the lens placement section inner surface are moved closer to one another by the insertion device main body as the removable cartridge is being attached to the insertion device main body; and
maintaining the compression of the lens placement section after the removable cartridge has been attached to the insertion device main body.
2. A method as claimed in claim 1 , wherein
the removable cartridge defines a lens advancement axis; and
the step of compressing the lens placement section comprises compressing the lens placement section in a direction that is transverse to the lens advancement axis.
3. A method as claimed in claim 1 , wherein
the insertion device main body defines a longitudinal axis and includes a cartridge attaching portion with first and second abutting surfaces on opposite sides of the longitudinal axis; and
the step of compressing the lens placement section comprises compressing the lens placement section with the first and second abutting portions.
4. A method as claimed in claim 3 , wherein
the removable cartridge defines first and second exterior surfaces that are aligned with the lens placement section; and
the step of compressing the lens placement section comprises applying compression force to the first and second exterior surfaces of the removable cartridge with the first and second abutting portions of the insertion device main body.
5. A method of positioning an intraocular lens that has been placed within a lens placement section of a removable cartridge, the removable cartridge including a main body in which the lens placement section is located and the main body includes first and second slots that are coextensive with at least a portion of the lens placement section, the method comprising the steps of:
compressing the lens placement section of the removable cartridge, at first and second locations that are longitudinally aligned with, and circumferentially offset from, the first and second slots, with a portion of an insertion device main body as the removable cartridge is being attached to the insertion device main body; and
maintaining the compression of the lens placement section after the removable cartridge has been attached to the insertion device main body.
6. A method of positioning an intraocular lens that has been placed within a lens placement section of a removable cartridge that includes first and second wing portions, the method comprising the steps of:
compressing the lens placement section of the removable cartridge by inserting the first and second wing portions into first and second grooves of an insertion device main body that are configured to receive the first and second wing portions as the removable cartridge is being attached to the insertion device main body; and
maintaining the compression of the lens placement section after the removable cartridge has been attached to the insertion device main body.
7. A method of operating an intraocular lens insertion device, comprising the steps of:
placing an intraocular lens into a lens placement section of a removable cartridge, the lens placement section including an inner surface; and
after the placing step, attaching the removable cartridge to an insertion device main body that is configured to compress the lens placement section such that portions of the lens placement section inner surface are moved closer to one another by the insertion device main body as the removable cartridge is being attached to the insertion device main body and is also configured to maintain the compression of the lens placement section after the cartridge has been attached to the insertion device main body.
8. A method as claimed in claim 7 , further comprising the step of:
pushing the intraocular lens out of the compressed removable cartridge with a plunger.
9. A method as claimed in claim 7 , wherein
the insertion device main body includes a plunger; and
the compression of the lens placement section during the attaching step aligns the intraocular lens with the plunger.
10. A method as claimed in claim 7 , wherein
the removable cartridge defines a lens advancement axis; and
the lens placement section is compressed in a direction that is transverse to the lens advancement axis during the attaching step.
11. A method as claimed in claim 7 , wherein
the insertion device main body defines a longitudinal axis and includes a cartridge attaching portion with first and second abutting surfaces on opposite sides of the longitudinal axis; and
the lens placement section is compressed by the first and second abutting portions during the attaching step.
12. A method as claimed in claim 11 , wherein
the removable cartridge defines first and second exterior surfaces that are aligned with lens placement section; and
the first and second abutting portions of the insertion device main body apply compression force to the first and second exterior surfaces of the removable cartridge during the attaching step.
13. A method as claimed in claim 7 , wherein
the removable cartridge includes a main body in which the lens placement section is located and the main body includes first and second slots that are coextensive with at least a portion of the lens placement section; and
the lens placement section is compressed at first and second locations that are longitudinally aligned with, and circumferentially offset from, the first and second slots during the attaching step.
14. A method as claimed in claim 7 , wherein
the removable cartridge includes first and second wing portions;
the insertion device main body includes first and second grooves configured to receive the first and second wing portions; and
the lens placement section is compressed as the first and second wing portions into are inserted into first and second grooves during the attaching step.