Injector tip with spirally extending grooves

Abstract

The present invention relates to an injector (20) for inserting an intraocular lens (1) into an eye (10), comprising an injector shaft (26), an injector body (41) defining a folding chamber (21), and an injector tip (22) having an opening (23), wherein the plunger is longitudinally movable on the injector body and is configured to deliver the intraocular lens from the folding chamber (21) into the injector tip (22) and then out of the injector through the opening (23) by the movement of a plunger in the insertion direction (40) of the injector. The present invention relates to an injector (20) having a plunger (42), wherein the injector tip has an end face (27) that is directly adjacent to the opening, and the normal of the end face forms an end face angle different from 0° with respect to the injector axis, so that it is cut obliquely in the region of the opening (23), and the injector tip has at least one helical groove (27) on its inner wall, the groove being configured to rotate the intraocular lens in the injector circumferential direction (44) with respect to the injector axis as the intraocular lens passes through the injector tip.

Description

[Technical Field]

[0001] The present invention relates to an injector for inserting an intraocular lens into the eye, comprising an injector tip having a spirally extending groove. [Background technology]

[0002] For example, in the treatment of cataracts, the lens of the eye may be replaced with an intraocular lens. In further examples, the intraocular lens may be a phakic intraocular lens that is inserted into the eye in addition to the lens, particularly to correct myopia. Figure 1 shows a cross-section of an exemplary intraocular lens 1. The intraocular lens 1 can have a convex-concave shape and thus has a convex side 3 and a concave side 4. Furthermore, the intraocular lens 1 has an optical axis 2, a radial direction 6 with respect to the optical axis 2, and a circumferential direction 7 with respect to the optical axis 2. In this embodiment, the intraocular lens 1 has a haptic 5 which is a plate haptic, and the haptic 5 comprises a first longitudinal end 8 which forms the end opposite to the radial direction 6 in the intraocular lens 1, and a second longitudinal end 9 which forms the end of the radial direction 6 in the intraocular lens 1. Figures 2 and 3 show an injector 20 which inserts the phakic intraocular lens 1 into the eye 10. The phakic intraocular lens 1 is to be inserted between the lens 12 of the eye 10 and the iris 13 of the eye 10. For this purpose, an incision is made in the cornea 11 of the eye 10, and the injector tip 22 is inserted into the eye 10 through the incision. The injector 20 is equipped with a folding mechanism, and the folding mechanism folds the intraocular lens 1, which is positioned in the folding chamber 21, so that the first lateral edge 80, which is positioned perpendicular to the first longitudinal end 8, and the second lateral edge 90, which is positioned perpendicular to the second longitudinal end 9 and opposite to the first lateral edge 80, are displaced toward each other. Subsequently, the intraocular lens 1 is displaced out of the injector 20 and into the eye 10. The folding mechanism includes a first wing 30, which is positioned opposite to the eye 10 to avoid contact between the face and the first wing 30 while the intraocular lens 1 is being inserted into the eye 10.

[0003] In Figure 2, before folding, the intraocular lens 1 is positioned so that the convex side 3 faces the support surface 210 of the folding chamber 21. Therefore, the observer viewing the intraocular lens 1 stored in the loading chamber 21 will see the concave side 4. This causes the intraocular lens 1 to subsequently fold so that the convex side 3 faces the support surface 210 of the folding chamber 21. However, in this orientation, the intraocular lens 1 is inserted into the eye 10 in the wrong orientation, with the convex side 3 facing the crystalline lens 12 (see the dashed line on the intraocular lens 1 in Figure 2).

[0004] In Figure 3, before folding, the intraocular lens 1 is positioned so that the convex side 3 faces the observer looking in the direction of the folding chamber 21. This causes the intraocular lens 1 to then fold so that the convex side 3 is positioned away from the support surface 210 of the folding chamber. The effect of this is that the concave side 4 facing the crystalline lens 12 allows the intraocular lens 1 to enter the eye 10 in the correct orientation, and thus allows the intraocular lens 1 to fit snugly against the crystalline lens 12 in an optimal manner (see the dashed line of the intraocular lens 1 in Figure 3). However, in this case, the intraocular lens 1 is subjected to strong mechanical stress during the feeding operation in the injector tip 22, and this strong mechanical stress may damage the intraocular lens 1 or the injector tip 22. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] Therefore, the problem addressed by the present invention is to develop an injector for inserting an intraocular lens into the eye, which ensures the correct orientation of the intraocular lens in the eye while avoiding strong mechanical stress on the intraocular lens during insertion into the eye. [Means for solving the problem]

[0006] An injector for inserting an intraocular lens into the eye according to the present invention comprises an injector axis, an injector body, and a plunger. The injector body defines a folding chamber and includes an injector tip having an opening. The plunger is longitudinally displaceable on the injector body and is configured to transport the intraocular lens out of the folding chamber, into the injector tip, and then out of the injector through the opening, which is accomplished by displacing the plunger in the insertion direction of the injector. The injector tip is beveled in the area of ​​the opening, such that the injector tip has an end face directly adjacent to the opening, and the normal of the end face makes an end face angle that is not equal to 0° with respect to the injector axis. The injector tip has at least one helical groove on its inner wall, which is configured to pivot the intraocular lens in the circumferential direction of the injector relative to the injector axis as the intraocular lens passes through the injector tip.

[0007] If the intraocular lens (IOL) is not symmetrical with respect to a mirror surface whose normal is parallel to the optical axis of the IOL, the IOL may be placed in a folding chamber so that the IOL folds in a way that minimizes mechanical stress on the IOL. After folding, the IOL may be displaced into the injector tip by a plunger and transported out of the injector through an opening. By providing a groove, the IOL can be rotated so that it is oriented toward the end face so that the IOL can be inserted into the eye in the correct orientation.

[0008] The intraocular lens has an initial orientation before being displaced into the injector tip and a final orientation after being displaced out of the injector tip, and preferably at least one groove is configured to rotate the intraocular lens from the initial orientation to the final orientation over an intraocular lens angle ranging from 90° to 270° around the injector axis. Particularly preferably, the intraocular lens angle is in the range of 150° to 210° or 170° to 190°.

[0009] The ridge preferably covers an angular range of less than 360° with respect to the injector axis, particularly an angular range of 330° or less, or 270° or less, or 180° or less.

[0010] The injector tip and at least one groove are preferably sized so that the intraocular lens enters at least one groove as the plunger is displaced in the insertion direction, and then slides within at least one groove, thereby pivoting.

[0011] The injector comprises a folding mechanism configured to fold the intraocular lens in a folding chamber by moving the folding mechanism from its initial state to its final state, wherein the folding mechanism comprises a projection, and preferably the distal end of the projection protrudes from the injector in the radial direction relative to the injector axis in the final state of the folding mechanism. The radial direction of the injector is oriented from inside to outside, thereby allowing the projection to protrude outward from the rest of the injector. By swirling the intraocular lens at the injector tip, the injector can be designed so that its end face is oriented toward the projection so that the projection is oriented away from the eye when the intraocular lens is inserted into the eye, thereby avoiding contact of the projection with the patient.

[0012] The injector tip preferably comprises the longest outermost fiber and the shortest outermost fiber, the shortest outermost fiber being positioned so as to face away from the projection in the circumferential direction of the injector. When the projection is positioned away from the eye when the intraocular lens is inserted into the eye, this results in the shortest outermost fiber being positioned further inside the eye than the longest outermost fiber. As a result, when the intraocular lens moves away from the opening, the intraocular lens displaces away from the cornea.

[0013] The folding mechanism preferably comprises a folding wedge, which folds the intraocular lens when the folding wedge is inserted into a folding chamber. The injector may include a holder that holds the folding wedge and forms a protrusion. When the folding wedge is inserted into the folding chamber, the folding wedge makes central contact with the intraocular lens and can dent the intraocular lens such that the two ends of the intraocular lens, which face opposite each other and are positioned outward perpendicular to the optical axis of the intraocular lens, are displaced toward each other. In the initial state of the folding mechanism, the folding wedge may be positioned at a distance from the intraocular lens. In the final state of the folding mechanism, the folding wedge may be in contact with the intraocular lens and fold the intraocular lens.

[0014] Alternatively, the folding mechanism may include a butterfly mechanism comprising a first wing and a second wing, wherein the first and second wings are configured to be coupled together, and thus to be in the final state of the folding mechanism, by pivoting around the injector axis, and the first and second wings protrude together from the injector in the radial direction relative to the injector axis, forming a protrusion in the final state of the folding mechanism.

[0015] The intraocular lens is preferably positioned and oriented in the folding chamber such that the folding mechanism folds the intraocular lens with the convex side facing the support surface of the folding chamber. As a result, the mechanical stress on the intraocular lens is particularly reduced. If the folding mechanism includes a folding wedge, the concave side may be positioned facing the folding wedge for this purpose.

[0016] The intraocular lens is preferably a phakic intraocular lens. Alternatively, the intraocular lens is preferably provided to replace the lens of the eye.

[0017] The end face angle is preferably in the range of 20° to 70°, 30° to 60°, or 40° to 50°.

[0018] According to the present invention, the injector is oriented in the direction of the injector axis, increases as the distance from the opening decreases, is associated with coordinate h having a respective ridge for each of the grooves, and the shape of at least one ridge is described by a function Φ(h) specifying the position of the ridge in the circumferential direction of the injector, a radius r(h) originating from the injector axis, disposed at the injector tip, describing a passage that an intraocular lens is intended to traverse, and a function m(h) specifying the amount of protrusion of the ridge from the radius r(h) in the direction of the injector axis, where m(h)=0 means that no ridge is present. For example, Φ(h) may specify the position of the most inwardly protruding portion of the ridge at position h.

[0019] According to the present invention, the function Φ(h) is constant in a first end region starting from the opening, and m(h) is preferably greater than zero in the first end region. As a result, the intraocular lens exits the opening without twisting.

[0020] The function m(h) preferably increases monotonically from a function value of zero. As a result, even when the intraocular lens hits the ridge, it does not hit a stepped portion, which prevents the intraocular lens from being caught on the ridge.

[0021] Preferably, the entire function Φ(h) increases monotonically. Alternatively, the function Φ(h) preferably has a local maximum in a second end region starting at the opening, and decreases, in particular monotonically decreases. This causes the intraocular lens to rotate in the direction opposite to the direction of initial rotation, i.e., opposite to the circumferential direction, which can prevent the intraocular lens from exiting the opening in an uncontrolled manner. In particular, the second end region extends from the maximum portion to the opening.

[0022] The shape of the passage is preferably described by a function e(h), which is the ratio of the minor axis to the major axis of the ellipse, where the minor and major axes extend to a plane at position h, and the normal to the plane is parallel to the injector axis. In this case, in the third end region starting at the opening, e(h)<1 is applied to the function e(h), and it is particularly preferable that the minor axis points from the longest outermost fiber (24) to the shortest outermost fiber. For example, e(h End ) can be in the range of 0.5 to 0.9, or 0.6 to 0.8, h End is the coordinate h at the opening. Alternatively, e(h End ) = 1, h End It is particularly preferable that the coordinates h of the opening are such that

[0023] The present invention will be described in more detail below with reference to the attached schematic diagram. [Brief explanation of the drawing]

[0024] [Figure 1] A schematic diagram of the cross-section passing through the intraocular lens is shown. [Figure 2] A schematic diagram of the cross-section of the eye and a conventional injector inserted into the eye is shown, with the convex side of the intraocular lens facing the support surface of the folding chamber. [Figure 3] Figure 2 shows a schematic cross-sectional view, where the concave side of the intraocular lens faces the support surface of the folding chamber. [Figure 4] A schematic diagram of a perspective view of an injector according to the present invention is shown. [Figure 5] A schematic diagram of a longitudinal cross-section passing through the injector according to the present invention is shown. [Figure 6] This diagram shows a schematic perspective view of the injector tip of an injector according to the technology. [Figure 7] The plot of the function r(h) is shown. [Figure 8] The plot of the function Φ(h) is shown. [Figure 9] The plot of the function m(h) is shown. [Figure 10] The plot of the function e(h) is shown. [Figure 11]Further plots of the function Φ(h) are shown. [Figure 12] This shows a schematic diagram of the injector tip in a plan view opposite to the injector insertion direction. [Figure 13] Further schematic diagrams of the injector tip in the insertion direction are shown. [Figure 14] This shows a schematic diagram of the injector plunger in a plan view opposite to the insertion direction. [Modes for carrying out the invention]

[0025] As can be seen from Figures 4 to 6, the injector 20 for inserting the intraocular lens 1 into the eye 10 comprises an injector shaft 26, an injector body 41, and a plunger 42. The injector body 41 defines a folding chamber 21 and includes an injector tip 22 having an opening 23. The plunger 42 is positioned on the injector body 41 so as to be displaceable in the longitudinal direction and is configured to transport the intraocular lens 1 out of the folding chamber 21, into the injector tip 22, and then out of the injector 20 through the opening 23. This transport is achieved by displacing the plunger 42 in the insertion direction 40 of the injector 20. The injector tip 22 has an end face 27 that is directly adjacent to the opening 23, and the normal to the end face forms an end face angle with respect to the injector shaft 26 that is not equal to 0°, so that it is cut obliquely in the area of ​​the opening 23. The injector tip 22 has at least one spirally extending groove 27 on its inner wall, which is configured to pivot the intraocular lens 1 in the injector circumferential direction 44 relative to the injector axis 26 as the intraocular lens passes through the injector tip 22. Each ridge 28 is provided in each groove 27 and can define the associated groove in the injector circumferential direction 44. The insertion direction 40 is assumed to be parallel to the injector axis 26, and in particular to coincide with the injector axis 26.

[0026] The injector tip 22 and at least one groove 27 may preferably be sized so that the intraocular lens 1 enters at least one groove 27 when the plunger 42 is displaced in the insertion direction 40, and then slides within at least one groove 27, thereby pivoting.

[0027] The intraocular lens 1 comprises a convex side 3 and a concave side 4 positioned opposite to the convex side 3 (see Figure 1). The convex side 3 and the concave side 4 are configured to manipulate light by refraction or diffraction, particularly to focus it, so that the intraocular lens 1 can form an image. The intraocular lens 1 may be a phakic intraocular lens 1, or an intraocular lens 1 configured to replace the lens 12 of the eye 10. For example, the end-face angle may be in the range of 20° to 70°, 30° to 60°, or 40° to 50°.

[0028] Figure 4 shows that the intraocular lens 1 may have an initial orientation before being displaced into the injector tip 22 (Figure 4 shows the intraocular lens 1 positioned in the initial orientation in the folding chamber 21) and a final orientation after being displaced out of the injector tip 22 (Figure 4 shows the intraocular lens 1 positioned in the final orientation to the right of the injector tip 22). At least one groove 27 may be configured to rotate the intraocular lens 1 from the initial orientation to the final orientation over an intraocular lens angle ranging from 90° to 270° around the injector axis 26, with an angle of 180° depicted in Figure 4. In particular, the intraocular lens angle may be in the range of 150° to 210° or 170° to 190°.

[0029] The injector 20 is a folding mechanism configured to fold the intraocular lens 1 in the folding chamber 21 by moving the folding mechanism from an initial state to a final state, wherein the folding mechanism may comprise a first wing 30 and a second wing 300. The first wing 30 and / or the second wing 300 may be coupled to each other, for example by a latch, by pivoting around the injector axis 26, and the first wing 30 and the second wing 300 may reach a final state of the folding mechanism such that they protrude together from the injector 20 in the injector radial direction 43 relative to the injector axis 26, thereby forming a protrusion. The injector radial direction 43 is directed from the inside to the outside, so that the protrusion may protrude outward from the rest of the injector 20. The first wing 30 may be positioned so as not to move, such that only the second wing 300 can pivot toward the first wing 30. However, the injector 20 may also be designed so that the first wing 30 and the second wing 300 can move toward each other. As can be seen in Figure 5, the injector tip 22 may have the longest outermost fiber 24 and the shortest outermost fiber 25, the shortest outermost fiber 25 being positioned opposite the protrusion in the injector circumferential direction 44.

[0030] The folding mechanism may include a folding wedge that folds the intraocular lens 1 when inserted into the folding chamber 21. The injector 20 may include a holder that holds the folding wedge and forms a protrusion.

[0031] The intraocular lens 1 may be positioned and oriented in the folding chamber 21 such that the folding mechanism folds the intraocular lens 1 so that the convex side 3 faces the support surface of the folding chamber 21. If a folding wedge is provided, this may be achieved, for example, by positioning the concave side 4 to face the folding wedge, and by the folding wedge contacting the concave side 4 when the folding mechanism is moved from its initial state to its final state. If a butterfly mechanism is provided, this may be achieved, for example, by the first wing 30 being pivotable around the injector axis 26 up to the second wing 300.

[0032] The injector 1 is oriented in the direction of the injector axis 26 and associated with a coordinate h that increases as the distance from the opening 23 decreases (see Figure 5), and may have a ridge 28 in each groove 27 (see Figures 5 and 6). Furthermore, the injector 1 may be associated with a coordinate x positioned perpendicular to coordinate h, and a coordinate y positioned perpendicular to coordinates h and x (see Figure 12). The shape of at least one ridge 28 can be described by a function Φ(h) (see Figures 8 and 11) that specifies the position of the ridge 28 in the injector circumferential direction 44, a radius r(h) (see Figure 7) that describes a passage 45 (see Figure 5) that starts from the injector axis 26, is positioned in the injector tip 22, and through which the intraocular lens 1 is to traverse, and a function m(h) (see Figure 9) that specifies the amount of projection of the ridge 28 from the radius r(h) in the direction of the injector axis 26 (see Figure 5). It is assumed that Φ will increase in the injector circumferential direction 44. For example, Φ(h) can specify the position of the part of the ridge 28 that protrudes most inward at position h. For function arguments where m(h)=0, this means that the ridge 28 does not exist. Furthermore, the shape of the passage 45 can be described by a function e(h), which is the ratio of the minor axis to the major axis of an ellipse, where the minor and major axes extend to a plane at position h, and the normal to this plane is parallel to the injector axis 26. When e(h)=1, the passage 45 has a circular cross-section, and when e(h)<1, the passage 45 has an elliptical cross-section. The initial position where the ridge 28 is formed is h.Start Let h be the position of the opening 23 End as defined.

[0033] FIG. 7 shows that r(h) can be designed to be strictly monotonically decreasing. For example, r(h End ) can be in the range from 1.0 mm to 2.0 mm. For example, r(h Start ) can be in the range from 3.0 mm to 5.0 mm.

[0034] FIG. 8 and FIG. 9 show that in a first end region starting from the opening 23, the function Φ(h) can be constant, and m(h) can be greater than zero in the first end region. As a result, the ridge 28 is oriented in the direction of the injector axis 26 over the entire first end region. For example, the first end region may have a length in the direction of the injector axis 26 in a range greater than 1 mm and less than 5 mm. It can be seen from FIG. 9 that the function m(h) can increase monotonically starting from a function value of zero. It is also contemplated that after monotonically increasing, the function m(h) reaches a maximum value m max and then decreases monotonically. As shown in FIG. 9, m(h End ) > 0, or m(h End ) = 0 is also contemplated. When m(h End ) > 0, m(h End ) is, for example, 0.05*m max to 0.7*m max can be in the range.

[0035] FIG. 8 and FIG. 11 show that Φ(h End ) - Φ(h Start ) = π can hold, but it is also contemplated that Φ(h End ) - Φ(h Start ) can be in the range from 0.5*π (90°) to 1.5*π (270°), or from 0.75*π (135°) to 1.25*π (225°). FIG. 8 shows that the entire function Φ(h) can increase monotonically. FIG. 11 shows that the function Φ(h) can first increase monotonically to a maximum value, and then decrease monotonically to h End .

[0036] Figure 10 shows that in the third end region starting from the opening 23, e(h)<1 can be applied to the function e(h). In this case, the minor radius can be directed from the longest outermost fiber 24 to the shortest outermost fiber 25. End ) can be in the range of 0.5 to 0.9, or 0.6 to 0.8. Alternatively, e(h End The value e(h)=1 is applied, and in particular, it is assumed that e(h)=1 is applied to the entire function.

[0037] Figure 12 shows the first to eighth inner contours 31 to 38 of the injector tip 22, and the second to eighth inner contours 32 to 38 are also plotted in Figure 6. It can be seen that two grooves 27 are provided from the first to the eighth inner contour 31 to 38, and it is also conceivable that two or more grooves 27 may be provided. Each of the first to eighth inner contours 31 to 38 may comprise multiple cells, each cell representing the largest non-repeating component, and each cell having the same structure. Figure 12 plots the first cell I and the second cell II of the inner contour 32. For example, the cells may be realized symmetrically or not symmetrically.

[0038] It is not assumed that the plunger 42 is mounted to be rotatable relative to the insertion direction 40 so that it can follow the rotation of the intraocular lens 1. If the injector 1 is configured to displace the plunger 42 longitudinally by rotating the plunger 42, a meshing portion may be provided that allows the longitudinal end of the plunger 42 facing the intraocular lens 1 to rotate in synchronously with the intraocular lens 1. This may be done by a cam mechanism or a planetary mechanism. The longitudinal end of the plunger 42 facing the intraocular lens 1 may be structured to grip the intraocular lens 1. For example, for this purpose, the plunger 42 may have one or more notches 46 at its longitudinal end facing the intraocular lens 1 (see Figure 14). For example, the notches 46 or more notches 46 may be V-shaped (as shown in Figure 14). If multiple notches 46 are provided, the notches 46 may be arranged to intersect each other in particular (see Figure 14).

[0039] It is also conceivable that the injector tip 22 has a lubricating coating on the surface defining the passage 45. For example, the coating may include glycerol monostearate, a hydrophilic polymer, or soap.

[0040] It is also conceivable that the injector tip 22 may be manufactured by injection molding. For this purpose, the tool for performing the injection molding may be equipped with a swivelable core. To prevent undercuts in the injector tip, the ridge 28 may also be conceivable to cover an angular range of less than 360° around the injector axis 26, particularly an angular range of 330° or less, or 270° or less, or 180° or less. Alternatively, it is conceivable that the injector tip 22 may be manufactured using additive manufacturing. [Explanation of Symbols]

[0041] 1. Intraocular lens 2 Optical axis 3 Convex side 4. Concave side 5 Haptics 6. Radial direction 7 Circumferential direction 8. First longitudinal end 9. Second longitudinal end 10 eyes 11 Cornea 12 crystalline lens 13 Iris 20 Injectors 21 Folding Chamber 22 Injector Tips 23 Opening 24 Longest outermost fiber 25 Shortest outermost fiber 26 Injector shaft 27 Groove 28 Ridge 30 First Wing 31 First inner contour 32 Second inner contour 33 Third Inner Contour 34. Fourth Inner Contour 35. Fifth Inner Contour 36. The sixth inner contour 37. The seventh inner contour 38. The eighth inner contour 40 Insertion direction 41 Injector body 42 plungers 43 Injector radial direction 44 Injector circumferential direction 45 aisles 46 cuts 51 First Frank 52 The Second Frank 80 First lateral edge 90 Second lateral edge 210 Bearing surface 300 Second Wing h Coordinates in the direction of the injector axis x coordinate y coordinate r radius φ rotation angle m modulation depth e eccentricity

Claims

1. An injector for inserting an intraocular lens (1) into an eye (10), comprising an injector shaft (26), an injector body (41) defining a folding chamber (21), an injector tip (22) having an opening (23), and a plunger (42) disposed longitudinally on the injector body (41) and configured to transport the intraocular lens (1) out of the folding chamber (21), into the injector tip (22), and then out of the injector (20) through the opening (23), wherein the transport is In an injector having a plunger (42) which is brought about by displacing the plunger (42) in the insertion direction (40) of the injector (20), the injector tip (22) has an end face (27) directly adjacent to the opening (23), and the normal of the end face is cut obliquely in the region of the opening (23) such that the end face angle is not equal to 0° with the injector axis (26), and the injector tip (22) has at least one helical groove (27) on its inner wall, the groove is such that the intraocular lens is the injector As the intraocular lens (1) passes through the injector tip (22), it is configured to rotate in the injector circumferential direction (44) relative to the injector axis (26), the injector (1) is oriented in the direction of the injector axis (26), associated with a coordinate h that increases as the distance from the opening (23) decreases, and each of the grooves (27) has a ridge (28), the shape of the at least one ridge (28) is a function Φ(h) that specifies the position of the ridge (28) in the injector circumferential direction (44), and the injector An injector described by a radius r(h) that describes a passage (45) that is positioned on the injector tip (22) and through which the intraocular lens (1) is to pass, starting from the injector axis (26), and a function m(h) that specifies the amount of protrusion of the ridge (28) from the radius r(h) in the direction of the injector axis (26), where m(h) = 0 means that the ridge (28) does not exist, the function Φ(h) is constant in a first end region starting from the opening (23), and m(h) is greater than zero in the first end region.

2. The injector according to claim 1, wherein the intraocular lens (1) has an initial orientation before displacing the intraocular lens (1) into the injector tip (22) and a final orientation after displacing the intraocular lens (1) out of the injector tip (22), and the at least one groove (27) is configured to rotate the intraocular lens (1) from the initial orientation to the final orientation over an intraocular lens angle ranging from 90° to 270° about the injector axis (26).

3. The injector according to claim 1 or 2, wherein the injector (20) includes a folding mechanism configured to fold the intraocular lens (1) in the folding chamber (21) by moving the folding mechanism from an initial state to a final state, the folding mechanism includes a protrusion, and the distal end of the protrusion protrudes from the injector (20) in the radial direction (43) of the injector with respect to the injector axis (26) in the final state of the folding mechanism.

4. The injector according to claim 3, wherein the injector tip (22) comprises the longest outermost fiber (24) and the shortest outermost fiber (25), and the shortest outermost fiber (25) is arranged to face away from the protrusion in the circumferential direction (44) of the injector.

5. The injector according to claim 3 or 4, wherein the intraocular lens (1) comprises a convex side (3) and a concave side (4), the convex side 3 and the concave side 4 manipulate light by refraction or diffraction for imaging by the intraocular lens (1), and the folding mechanism is arranged and directed in the folding chamber (21) such that the folding mechanism folds the intraocular lens (1) so that the convex side (3) faces the support surface (210) of the folding chamber (21).

6. The injector according to any one of claims 1 to 5, wherein the function m(h) is monotonically increasing from a function value of zero, and in particular, the entire function Φ(h) is monotonically increasing.

7. The injector according to any one of claims 1 to 6, wherein the overall function Φ(h) has a maximum value in the second end region starting at the opening (23) and decreases, in particular monotonically decreasing.

8. The shape of the passage (45) is described by a function e(h) which is the ratio of the minor axis to the major axis of the ellipse, the minor axis and the major axis extend to a plane at position h, the normal of the plane is parallel to the injector axis (26), and in the third end region starting at the opening (23), e(h) < 1 is applied to the function e(h), in particular the minor axis from the longest outermost fiber (24) to the shortest outermost fiber (25) The injector according to any one of claims 1 to 7.

Images