Instrument for inserting intraocular lens
An intraocular lens insertion instrument capable of smoothly pushing out a preset lens is provided. An intraocular lens insertion instrument ( 1 ) comprises: a main body ( 3 ) including a lens setting section ( 8 ) on which a lens ( 2 ) is set, a transition section ( 22 ) that deforms the lens ( 2 ), and a nozzle piece ( 21 ) that releases the lens ( 2 ); and a lens push-out mechanism ( 4 ) that pushes out the lens ( 2 ) set on the lens setting section ( 8 ). The instrument ( 1 ) further includes a releasing means ( 11 ) for releasing the lens ( 2 ) pushed by the lens push-out mechanism ( 4 ) from the lens setting section ( 8 ). The releasing means ( 11 ) has a posture holding mount ( 12 ) that holds the lens ( 2 ) with a forward tilt relative to an axial line (A) of lens movement. The posture holding mount ( 12 ) has a passage ( 15 ) through which the lens push-out mechanism ( 4 ) passes.
1. An apparatus, comprising:
a main body defining a lens movement direction and including a lens setting section, a nozzle, and a tapered transition section between the lens setting section and the nozzle, the lens setting section having first and second longitudinally extending members, separated by a groove, that each slope downward toward the nozzle in the lens movement direction from a highest point to a lowest point that is distal of the highest point;
an intraocular lens stored on the first and second longitudinally extending members in a substantially unstressed state with an edge closest to the nozzle lower in elevation than an opposite edge farthest from the nozzle; and
a plunger carried within the main body and movable in the lens movement direction to drive the intraocular lens through the nozzle.
2. An apparatus as claimed in claim 1 , wherein
the lens setting section includes first and second longitudinally extending sidewalls respectively adjacent to the first and second longitudinally extending members.
3. An apparatus as claimed in claim 1 , wherein
the intraocular lens includes an optic and first and second haptics; and
the intraocular lens is stored on the first and second longitudinally extending members with diametrically opposed edges of the optic on the first and second longitudinally extending members.
4. An apparatus as claimed in claim 1 , further comprising:
a slider carried within the main body and movable in the lens movement direction to drive the intraocular lens from the lens setting section to the tapered transition section;
wherein the slider and the plunger are associated with one another such that the slider is distally movable relative to the plunger, and the plunger is distally movable relative to and distal of the slider.
5. An apparatus as claimed in claim 4 , wherein
the slider is carried within the main body such that a portion of the slider will be located within the groove in the lens setting section as the slider drives the intraocular lens from the lens setting section to the tapered transition section.
6. An apparatus as claimed in claim 4 , wherein
the slider includes a lens contact area; and
the plunger is narrower than the lens contact area.
7. An apparatus as claimed in claim 4 , wherein
the slider includes a guide groove in which a portion of the plunger is located.
8. An apparatus as claimed in claim 4 , wherein
the slider includes a scooping surface.
9. An apparatus as claimed in claim 8 , wherein
the intraocular lens includes an outer surface with a radius of curvature; and
the slider scooping surface comprises an arcuate surface with a radius of curvature that is substantially the same as the intraocular lens outer surface radius of curvature.
10. An apparatus as claimed in claim 4 , further comprising:
a slider handle located adjacent to the main body and connected to the slider; and
a plunger grip located proximal of the main body and connected to the plunger.
11. An apparatus as claimed in claim 10 , wherein
the slider handle includes first and second handle members located on opposite sides of the main body.
12. An apparatus as claimed in claim 10 , wherein
the plunger grip is rotatable.