Intraocular lens injector
Apparatuses, systems, and methods for implanting an intraocular lens into an eye are described. For example, an intraocular lens injector may include a passage formed in a distal end portion of the intraocular lens injector. The passage may define an interior surface, and a ramp may be formed on the interior surface so as to cause a leading haptic of an intraocular lens (IOL) being advanced through the passage to lift above a surface of an optic of the IOL to ensure proper folding of the IOL.
1. An intraocular lens (IOL) injector, comprising:
an injector body, comprising:
a bore defined by an interior wall, wherein the bore is configured to facilitate intraocular lens advancement through the injector body;
a longitudinal axis extending centrally along the injector body;
a plunger slideable within the injector body for pushing the IOL through the bore; and
a lifting feature extending from the interior wall and configured to engage a leading haptic of the IOL, the lifting feature comprising:
a base fixedly secured to the interior wall;
a pivoting portion; and
a hinge connecting the pivoting portion to the base, wherein the pivoting portion defines a first inclined surface and a second inclined surface for lifting the leading haptic of the IOL above an optic surface of the IOL as the IOL is advanced through the bore.
2. The IOL injector of claim 1 , wherein the lifting feature is disposed in a distal end portion of the injector body.
3. The IOL injector of claim 1 , wherein the lifting feature is configured such that the pivoting portion is deflected distally relative to the base upon engagement with the leading haptic of the IOL.
4. The IOL injector of claim 1 , wherein one or both of the first and second inclined surfaces of the pivoting portion of the lifting feature comprises a plurality of steps.
5. The IOL injector of claim 1 , wherein the lifting feature is formed of a flexible material having a hardness less than a material of the IOL.
6. The IOL injector of claim 1 , wherein the lifting feature is formed of a material having a hardness greater than a material of the IOL.
7. The IOL injector of claim 1 , wherein the plunger comprises a plunger tip configured to remain in contact with the interior wall of the injector body while being advanced through the injector body.
8. The IOL injector of claim 7 , wherein the plunger tip comprises a first groove positioned to engage a trailing haptic of the IOL as the plunger tip is advanced through the injector body.
9. The IOL injector of claim 8 , wherein the plunger tip is further configured to fold the trailing haptic over the optic surface of the IOL as the plunger tip is advanced along the pivoting portion of the lifting feature.
10. An intraocular lens (IOL) injector, comprising:
an injector body, comprising:
a bore defined by an interior wall, wherein the bore is configured to facilitate intraocular lens advancement through the injector body;
a longitudinal axis extending centrally along the injector body;
a distal end portion comprising a plurality of sidewalls, the plurality of sidewalls defining a passage in fluid communication with the bore;
a plunger slideable within the bore; and
a lifting feature extending from at least one of the plurality of sidewalls of the distal end portion and configured to engage a leading haptic of the IOL, the lifting feature comprising:
a base fixedly secured to the at least one of the plurality of sidewalls;
a pivoting portion; and
a hinge connecting the pivoting portion to the base, wherein the pivoting portion defines a first inclined surface and a second inclined surface for lifting the leading haptic of the IOL above an optic surface of the IOL as the IOL is advanced through the distal end portion.
11. The IOL injector of claim 10 , wherein the lifting feature is configured such that the pivoting portion is deflected distally relative to the base upon engagement with the leading haptic of the IOL.
12. The IOL injector of claim 10 , wherein one or both of the first and second inclined surfaces of the pivoting portion of the lifting feature comprises a plurality of steps.
13. The IOL injector of claim 10 , wherein the lifting feature is formed of a flexible material having a hardness less than a material of the IOL.
14. The IOL injector of claim 10 , wherein the lifting feature is formed of a material having a hardness greater than a material of the IOL.
15. The IOL injector of claim 10 , wherein the plunger comprises a plunger tip configured to remain in contact with the interior wall of the injector body while being advanced through the injector body.
16. The IOL injector of claim 15 , wherein the plunger tip comprises a first groove positioned to engage a trailing haptic of the IOL as the plunger tip is advanced through the injector body.
17. The IOL injector of claim 16 , wherein the plunger tip is further configured to fold the trailing haptic over the optic surface of the IOL as the plunger tip is advanced along the pivoting portion of the lifting feature.
18. An intraocular lens (IOL) injector, comprising:
an injector body, comprising:
a bore defined by an interior wall;
a distal end portion comprising a plurality of sidewalls, the plurality of sidewalls defining a passage in fluid communication with the bore;
a plunger slideable within the bore, the plunger comprising a plunger tip configured to remain in contact with the interior wall of the injector body while being advanced through the injector body; and
a lifting feature extending from the passage of the distal end portion and configured to engage a leading haptic of the IOL, the lifting feature comprising:
a base fixedly secured to the passage;
a pivoting portion; and
a hinge connecting the pivoting portion to the base, wherein the pivoting portion defines a first inclined surface and a second inclined surface for lifting the leading haptic of the IOL above an optic surface of the IOL as the IOL is advanced through the distal end portion.
19. The IOL injector of claim 18 , wherein the pivoting portion is deflected distally relative to the base upon engagement with the leading haptic of the IOL.
20. The IOL injector of claim 18 , wherein one or both of the first and second inclined surfaces of the pivoting portion of the lifting feature include a plurality of steps.