CONTACTLESS VISUALIZATION SYSTEM FOR AN OPERATING MICROSCOPE FOR EYE SURGERY

Description

[0001] The present invention relates to a contactless visualization system for a surgical microscope for ophthalmic surgery having the features of the preamble of claim 1.

[0002] For ophthalmic surgery of the posterior segment of the eye, so-called contactless visualization systems are frequently used, replacing the traditional visualization method using a contact lens placed over the patient's eye. These systems utilize so-called ophthalmoscopic magnifiers, which are placed close to the patient's eye and provide a realistic (albeit laterally and vertically inverted) image of the fundus of the eye in an intermediate image plane, which can then be viewed with a surgical microscope.

[0003] Due to the close placement of the ophthalmoscope to the patient's eye, they restrict the surgeon's working space. This is particularly problematic with multi-lens ophthalmoscopes (those with two lenses, for example), as the frame required for the multiple lenses further restricts the surgeon's working space. This leads to an undesirable impairment of the surgical procedure.

[0004] US 10 765 315 B2 describes a contactless visualization system for a surgical microscope for ophthalmic surgery with the features of the preamble of claim 1. WO 99 / 20171 A1 describes an indirect visualization system with a contact lens facing the eye and a further lens spaced therefrom.

[0005] Based on this, it is the object of the invention to further develop a contactless visualization system of the type mentioned at the outset in such a way that the difficulties mentioned can be overcome as completely as possible.

[0006] The invention is defined in independent claims 1 and 15. Advantageous embodiments are specified in the dependent claims.

[0007] Since the wall also serves as a mount for the second lens, it must have certain minimum mechanical dimensions and thicknesses for stability reasons. The necessary stability is maintained according to the invention, since only the at least one recess in which the edge of the second lens is exposed is provided to provide a surgeon with more working space.

[0008] The recess can extend in the wall from the free end toward the first lens, whereby the recess preferably does not extend to the upper side of the first lens, but rather ends before it. Thus, even in the area of ​​the recess, a certain height of the wall is still provided, which is advantageous for stability reasons.

[0009] The recess may taper towards the first lens.

[0010] There can be just one recess in which the edge of the second lens is exposed, or there can be multiple recesses in which the edge of the second lens is exposed. The wall can be designed such that no further opening or recess is provided. Alternatively, however, it is entirely possible for one or more additional openings and / or recesses to be formed in the wall.

[0011] Since the wall simultaneously serves as a mount for the second lens, it must have certain minimum mechanical sizes and thicknesses for reasons of stability. It is preferred if the wall is continuous in the circumferential direction. This means that the recess(es) and optionally the further opening(s) are preferably arranged such that the wall is uninterrupted or completely interrupted in the circumferential direction. The wall is therefore preferably designed such that in every position in the circumferential direction the wall has at least one section that extends in the direction from the first to the second lens. In other words, the wall can be designed such that the wall is closed in the circumferential direction or that at least one imaginary, closed curve runs on the wall in the circumferential direction.

[0012] In particular, two recesses are provided, which are spaced apart in the circumferential direction preferably by 80° to 140°, in particular 90° to 130°, and particularly preferably by 120°. This spacing preferably refers to the center of the respective recess in the circumferential direction. The width of the recess at the free end in the circumferential direction can be 20° to 70°, in particular 30° to 60° or 30° to 50°, and particularly preferably 35° to 45°. For example, the width can be 40°.

[0013] The ophthalmoscopy magnifier may have a holder connection with which the ophthalmoscopy magnifier can be mechanically connected to the surgical microscope, wherein the holder connection is connected to the frame at a connection point and the at least one recess is spaced from the connection point by 90° to 150° in the circumferential direction (preferably with respect to the center of the recess in the circumferential direction and to the center of the connection point in the circumferential direction).

[0014] Furthermore, at least one through-opening can be formed in the wall. This at least one through-opening serves to remove any fluid that may be present in the space between the two lenses. This can be a single through-opening for fluid removal or multiple through-openings for fluid removal.

[0015] This ensures the necessary mechanical stability on the one hand and fluid removal on the other.

[0016] The at least one through-opening can have a width of 20° to 70° in the circumferential direction, in particular of 30° to 60° or 30° to 50°, and particularly preferably of 35° to 45°. The width can be, for example, 40°.

[0017] In particular, the wall can be formed together with the first lens as a single-piece part. It is particularly preferred that this be an injection-molded part. This makes it possible to design the ophthalmoscopy magnifier as a single-use product or disposable item while simultaneously ensuring the necessary optical quality. The frame can ensure that the second lens is positioned at the optically predetermined position relative to the first lens. The single-piece design of the wall with the first lens is preferably realized as a material fit. However, implementation by means of a form fit is also possible.

[0018] In particular, the second lens can be arranged concentrically to the first lens.

[0019] The at least one through-opening is preferably formed closer to the first lens than to the second lens. In particular, the at least one through-opening can be formed such that its lower edge directly abuts the interface of the first lens that faces the second lens. This abutment of the lower edge against the interface of the first lens is preferably designed such that no recess is provided. For example, the lower edge can run perpendicular to the optical axis of the first lens.

[0020] In the visualization system according to the invention, a plurality of through-openings can be formed in the wall and spaced apart from one another in the circumferential direction. Thus, the at least one through-opening can comprise a plurality of through-openings. These can be two, three, four, five, or more through-openings.

[0021] For example, three through-openings can be provided, each spaced 120° apart in the circumferential direction. This spacing preferably refers to the center of the respective through-opening in the circumferential direction.

[0022] The first lens and / or the wall can be made of plastic. In addition to the first lens, the second lens can also be made of plastic. The second lens can have a holder connection that can be formed integrally with the second lens. In particular, the holder connection can be manufactured together with the second lens using a two-component injection molding process. The integral formation of the second lens with the holder connection is preferably realized as a form fit. However, implementation using a form fit is also possible.

[0023] The mount can be designed as a snap closure, clamp connection, or elastic clamp holder. For this purpose, the mount can have several elastic clamping fingers (for example, three, spaced apart from one another in the circumferential direction, for example, by 120° relative to the center of the respective clamping finger in the circumferential direction), each of which, for example, comprises a clamping groove. The second lens can have corresponding mount areas that engage the clamping grooves. Furthermore, the mount can have corresponding mount areas that have stop surfaces for the second lens or for the mount areas of the second lens.

[0024] However, any other type of holder using the socket is also possible, such as a screw cap, a bayonet cap, etc.

[0025] It is preferred if the at least one recess and the at least one through-opening are arranged offset from each other in the circumferential direction. In particular, the at least one recess and the at least one through-opening can be arranged such that they are spaced apart from each other in the circumferential direction. The distance can be, for example, 60° (with reference to the center of the respective recess in the circumferential direction and to the center of the respective through-opening in the circumferential direction).

[0026] Furthermore, the first lens together with the wall can have an n-fold rotational symmetry if n through-openings and / or n recesses are provided, where n is an integer ≥ 1 and ≤ 6. Particularly preferred is n = 3.

[0027] The contactless visualization system can further comprise an ophthalmoscopy loupe carrier to which the ophthalmoscopy loupe is mechanically connected. Using the ophthalmoscopy loupe carrier, the ophthalmoscopy loupe can be positioned in the imaging beam path of the surgical microscope and moved out of the imaging beam path. For this purpose, the ophthalmoscopy loupe carrier can also be mechanically connected to the surgical microscope. Furthermore, the ophthalmoscopy loupe carrier can be configured to allow rotation of the ophthalmoscopy loupe around the optical axis of the surgical microscope. This allows a user to move the ophthalmoscopy loupe into a desired rotational position, which is advantageous, for example, when using the ophthalmoscopy loupe.

[0028] Furthermore, the mechanical connection between the ophthalmoscopic loupe and the ophthalmoscopic loupe holder can be a detachable connection, allowing the ophthalmoscopic loupe to be replaced. This is particularly advantageous when the ophthalmoscopic loupe is designed as a disposable item.

[0029] The surgical microscope for eye surgery according to the invention can be designed in particular as a 3D surgical microscope.

[0030] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations indicated, but also in other combinations or on their own, without departing from the scope of the present invention.

[0031] The invention is explained in more detail below using exemplary embodiments with reference to the attached drawings, which also disclose features essential to the invention. These exemplary embodiments are merely illustrative and are not to be interpreted as restrictive. For example, a description of an embodiment with a large number of elements or components should not be interpreted to mean that all of these elements or components are necessary for implementation. Rather, other embodiments may also contain alternative elements and components, fewer elements or components, or additional elements or components. Elements or components of different exemplary embodiments may be combined with one another unless otherwise stated. Modifications and variations described for one of the exemplary embodiments may also be applicable to other exemplary embodiments.To avoid repetition, identical or corresponding elements in different figures are designated by the same reference numerals and are not explained more than once. The figures show: . Fig. 1 is a schematic view of an embodiment of the contactless visualization system 1 in conjunction with a surgical microscope 2; Fig. 2 is a perspective view of the ophthalmoscopy magnifier 3 of Fig. 1 ; Fig. 3 a perspective sectional view of the ophthalmoscopy magnifier 3 of Fig. 2 ; Fig. 4 a view from below of the first lens 27 1 of the ophthalmoscopy magnifier 3 of Fig. 1 ; Fig. 5 a perspective view of the first line 27 1 with the wall 30 of the ophthalmoscopy magnifier 3 of Fig. 1 ; Fig. 6 a perspective view of another embodiment of the ophthalmoscopy magnifier 3 of Fig. 1 , and Fig. 7 a perspective view of another embodiment of the ophthalmoscopy magnifier 3 of Fig. 1 .

[0032] In the Fig. 1 In the embodiment of a contactless visualization system 1 shown, this is shown together with a surgical microscope 2 for ophthalmic surgery. The contactless visualization system 1 comprises an ophthalmoscopy magnifier 3 and an ophthalmoscopy magnifier carrier 4, with which the ophthalmoscopy magnifier 3 can be inserted (or positioned) into an imaging beam path of the surgical microscope 2 and pushed out (or removed) from the imaging beam path, as indicated by the double arrow 5 in Fig. 1 The position of the ophthalmoscopy magnifier 3 outside the imaging beam path is shown in Fig. 1 shown in dashed lines.

[0033] How further Fig. 1As can be seen, the ophthalmoscopy magnifier 3 can be placed close to a patient's eye 6 by means of the ophthalmoscopy magnifier holder 4, so that a real as well as vertically and laterally inverted image of the fundus 7 of the patient's eye 6 is imaged in an intermediate image plane 8. This real as well as vertically and laterally inverted image of the fundus 7 is then viewed with the surgical microscope 2.

[0034] The surgical microscope 2 can have an illumination unit 9 for illuminating the patient's eye 6 (here, for example, the fundus 7) as well as imaging optics 10 for magnified imaging of the illuminated patient's eye 6 and, here, also for magnified imaging of the image in the intermediate image plane 8. The patient's eye 6 with pupil 28 and lens 29 is shown only schematically here.

[0035] The Fig. 1The schematically illustrated imaging optics 10 comprises an objective lens 11 and a first tube optics 12 for imaging the illuminated area of ​​the patient's eye 6 onto an image sensor 13. Furthermore, the imaging optics 10 comprises a first beam splitter 14 arranged between the objective lens 11 and the first tube optics 12, as well as a second tube optics 15 arranged downstream of the first beam splitter 14 and an eyepiece optics 16 arranged downstream of the second tube optics 15, so that an optical view 17 is provided, as indicated by the schematically illustrated eye 18 of a user.

[0036] The illumination unit 9 comprises a light source 19, a collector optics 20 arranged downstream of the light source 19, a second beam splitter 21 arranged between the objective 11 and the first tube optics 12 and the objective 11. The light of the light source 19 is focused by the collector optics 20 and coupled by means of the second beam splitter 21 into the beam path between the second beam splitter 21 and the objective 11 such that the area of ​​the patient's eye 6 to be illuminated is illuminated as evenly as possible, as in Fig. 1 is indicated by a schematic beam path up to the intermediate image plane 8. The light source 19 can be designed, for example, as a halogen lamp, a xenon discharge lamp, an LED or a laser.

[0037] The elements of the surgical microscope 2 described so far are arranged in a housing 22, as shown in Fig. 1is shown schematically. The ophthalmoscopy magnifier carrier 4 is mechanically connected to the housing 22, wherein in addition to the Fig. 1 schematically indicated insertion and removal of the ophthalmoscopy magnifier 3, a revolver mechanism can also be formed on the ophthalmoscopy magnifier support 4, so that a rotation of the ophthalmoscopy magnifier 3 about the z-axis and here about the optical axis OA of the imaging beam path of the surgical microscope 2 is also possible.

[0038] Furthermore, the surgical microscope 2 comprises a control unit 23 which has a processor P and a memory M and is connected, for example, to the light source 19, the image sensor 13 and a z-drive 24 with which the objective 11 can be moved in the z-direction for focusing.

[0039] Furthermore, a screen 25 and an input unit 26 can be connected to the control unit 23, as shown schematically in Fig. 1The input unit 26 is shown here only schematically as a keyboard. Other input units, such as foot switches and the like, are also possible.

[0040] The ophthalmoscopy magnifier 3 here comprises exactly a first plastic lens 27 1 with a first and second boundary surface 35, 36 and a second plastic lens 27 2 with a first and second boundary surface 37, 38, wherein a wall 30 extending in the direction of the second lens 27 2 is formed integrally with the first plastic lens 27 1. The free end 31 of the wall 30 serves as a mount 32, as in particular in connection with Figures 2-5 can be seen. The interfaces 35-38 are preferably curved, with at least one of the interfaces 35-38 being aspherically curved. The remaining interface(s) is / are preferably spherically curved.

[0041] The socket 32 ​​comprises a first, a second, and a third socket section 40, 41, and 42, which are each spaced 120° apart from one another in the circumferential direction. Each socket section 40-42 has a first and second stop region 40 1 , 40 2 ; 41 1 , 41 2 ; and 42 1 and 42 2 , between which an elastic clamping finger 43, 44, 45 with a clamping groove 43 1 , 44 1 , 45 1 is arranged.

[0042] The second lens 27 2 has three mounting areas 49 1 -49 3 (especially in Figures 2 and 3 visible) which are clamped in the clamping grooves 43 1 , 44 1 and 45 1 of the elastic clamping fingers 43-45 and rest against the stop areas 40 1 -40 3 such that the second lens 27 2 is held concentrically to the first lens 27 1. This type of clamping connection between the mount 32 and the second lens 27 2 can also be referred to as a snap connection.

[0043] The second lens 27 2 also has a holder connection 55, via which a detachable connection to the ophthalmoscopy magnifying glass carrier 4 is possible.

[0044] Since the wall 30 simultaneously serves as the mount 32 for the second lens 27 2 , it must have certain minimum mechanical dimensions and thicknesses for stability reasons. This results in the wall 30 being essentially closed, so that fluid can collect between the two lenses 27 1 and 27 2 but cannot drain away again. This would severely impair the optical imaging quality, potentially resulting in only a partially sharp image or even no sharp image at all.

[0045] Therefore, the wall 30 here has, in its lower region (and thus close to the first lens 27 1 ), three through-openings 46, 47 and 48 which are spaced apart from one another in the circumferential direction and are arranged offset from one another by 120° in the circumferential direction. The width of each through-opening 46-48 in the circumferential direction can be, for example, 40°. Due to these through-openings 46-48, it is possible for the unwanted liquid to either drain away on its own and / or for the user (for example the surgeon) to remove the liquid if necessary. For this purpose, for example, an appropriate liquid-absorbing tool (such as a swab) can be held on or in the through-opening 46-48.

[0046] This allows unwanted fluid to be easily removed from the space between the two lenses 27 1 and 27 2, ensuring the desired optical imaging quality in the long term.

[0047] As particularly in Figure 3As can be seen, the through openings 46-48 are preferably designed such that their lower edge 46 1 , 47 1 , 48 1 abuts the upper boundary surface 36 of the first lens 27 1. The upper boundary surface 36 is the boundary surface of the first lens 27 1 that faces the second lens 27 2. Preferably, the lower edge 46 1 , 47 1 , 48 1 of the through opening 46-48 is designed such that no depression is created between the lower edge 46 1 , 47 1 , 48 1 of the through opening 46-48 and the upper boundary surface 36. In the present case, the lower edge 46 1 , 47 1 , 48 1 is designed, for example, such that it extends substantially perpendicular to the optical axis of the first lens 27 1.

[0048] A further problem is that, due to the mount 32, more space is required laterally by the second lens 27 2 compared to previous almost rimless ophthalmoscopy magnifiers with only a single lens. This limits the surgeon's working space. In order to be able to provide the desired holder for the second lens 27 1 by means of the mount 32, certain mechanical minimum sizes and thicknesses of the wall 30 are absolutely necessary for reasons of stability. However, it has been recognized that it is not necessary for the mount 32 to encompass the entire edge of the second lens 27 2. Therefore, the wall 30 is designed here such that two recesses 50 and 51 are provided, in which the edge of the second lens 27 2 is exposed. The two recesses 50 and 51 are spaced apart from one another in the circumferential direction by, for example, 120°.Furthermore, a third recess 52 is provided in order to provide sufficient space for the holder connection 55 in the area of ​​the socket 32.

[0049] However, the recesses 50 and 51 are provided for the user or surgeon. If the position of the holder connection 55 is referred to as twelve o'clock, the first and second recesses 50 and 51 are preferably provided at the 4 o'clock and 8 o'clock positions, since this is where the surgeon's hands will be located.

[0050] As particularly in Figures 2-4As can be seen, the first and second recesses 50 and 51 extend from the free end 31 in the direction of the first lens 27 1 . In the exemplary embodiment described here, the recesses 50 - 51 do not extend as far as the upper side 36 of the first lens 27 1 , but end before that in order to provide a certain height of the wall 30 in the region of the recesses 50 and 51 for stability reasons. The lower edge 50 1 , 50 2 of the recesses 50 and 51 is thus above the lower edge 46 1 , 47 1 , 48 1 of the through openings 46 - 48. The same applies to the lower edge 52 1 of the recess 52. Each of the two recesses 50 and 51 has an extension of, for example, 40° in the circumferential direction at the free end 31 of the wall 30. The distance between the recesses 50 and 51 in the circumferential direction, which here is, for example, 120°, refers to the center of the recess 50, 51 at the free end 31 of the wall 30.The recess 52 is spaced 120° circumferentially from the two recesses 50 and 51.

[0051] As particularly in Figures 2, 3 and 5 As can be seen, the extent (or width) of the recess 50, 51 tapers in the circumferential direction in a direction from the second lens 27 2 to the first lens 27 1 . It can also be said that the width of the recesses 50, 51 decreases in the direction of the lower edge 50 1 , 50 2 or that the recesses 50, 51 taper.

[0052] Like the Figures 2-5 As can be seen, the through-openings 46-48 and the recesses 50-52 are arranged in the circumferential direction such that a recess 50-52 and a through-opening 46-48 are provided alternately. They are arranged offset from one another in the circumferential direction, for example, by 60°. In this way, a desired minimum height and thus a certain minimum stability can be provided at any point on the wall 30.

[0053] In particular, the wall 30 is thus continuous in the circumferential direction. The wall 30 is therefore uninterrupted in the circumferential direction. Thus, there is no position in the circumferential direction at which a portion of the wall does not extend over at least a certain distance in the direction from the first to the second lens 27 1 , 27 2 . In other words, one can imagine a self-contained curve running along the wall in the circumferential direction. Thus, there is always a self-contained path in the circumferential direction.

[0054] The first lens 27 1 (with the wall 30) is designed symmetrically in such a way that a rotation of the first lens 27 1 (with the wall 30) by 120° around the optical axis of the first lens 27 1 (with the wall 30) images onto itself. Thus, a 3-fold rotational symmetry exists.

[0055] The ophthalmoscopy magnifier 3 can in particular be designed such that it is detachably connected to the ophthalmoscopy magnifier carrier 4. In this case, for example, it is preferred that the ophthalmoscopy magnifier 3 is designed as a single-use article and thus can only be used exactly once. After use, the ophthalmoscopy magnifier 3 is disposed of, whereby in particular no problems arise with any otherwise necessary cleaning and disinfection of the ophthalmoscopy magnifier 3. In this case, the ophthalmoscopy magnifier 3 is preferably made of plastic. In particular, it can be a plastic injection molded part.

[0056] In Fig. 6 is shown a further exemplary embodiment of a non-contact visualization system 1, which together with the operating microscope 2 according to Fig. 1can be used. In this embodiment, only the recesses 50, 51 and 52 are provided. However, the wall 30 does not have any through-openings, as in the embodiment of Figures 2-5 are present.

[0057] In the embodiment according to Fig. 6 The advantage is achieved that the user or surgeon is provided with sufficient working space even in the area of ​​the second lens 27 2, since the recesses 50 and 51 are provided. Thus, the embodiment according to Fig. 6 from the embodiment according to Figures 2-5 only in that no through-openings are provided. All other features and configurations of the embodiments of Figures 2-5 are, however, available.

[0058] In Fig. 7 a further embodiment of a contactless visualization system 1 is shown, which together with the surgical microscope 2 according to Fig. 1can be used. In this embodiment, the ophthalmoscopic magnifier 3 only has the through openings 46 - 48. However, the recesses 50 - 52 are not provided. Otherwise, all features of the embodiment according to Figure 2-5 are implemented in the same way. Thus, the embodiment according to Fig. 7 has the advantage that the liquid that can accumulate in the space between the two lenses 27 1 and 27 2 either flows off by itself and / or can be removed by the user if required.

Claims

1. Contactless visualization system (1) for a surgical microscope (2) for eye surgery, the contactless visualization system (1) comprising an ophthalmic loupe (3) which is positionable in front of a patient's eye (6) and supplies a real and vertically and laterally inverted image of the eye fundus (7) of the patient's eye (6) in an intermediate image plane (8) that is observable by the surgical microscope (2), with the ophthalmic loupe (3) comprising a first and a second lens element (271, 272), with, in the state positioned in front of the patient's eye (6), the first lens element (271) being closer to the patient's eye (6) than the second lens element (272), and with a wall (30) extending from the first lens element (271) to the second lens element (272), the free end (31) of said wall being in the form of a mount (32) in which the second lens element (272) is held, and characterized in that the mount (32) comprises at least one cutout (50, 51), in which the edge of the second lens element (272) is exposed in order to give a surgeon operating space.

2. Contactless visualization system (1) according to Claim 1, characterized in that the wall (30) is formed throughout in the circumferential direction.

3. Contactless visualization system (1) according to Claim 1 or 2, characterized in that the ophthalmic loupe (3) comprises a holder connector (55), by means of which the ophthalmic loupe (3) is mechanically connectable to the surgical microscope (2), wherein the holder connector (55) is connected to the mount (32) at a connection site and the center of the at least one cutout (50, 51) is spaced apart from the center of the connection site in the circumferential direction by 90° to 150° in the circumferential direction.

4. Contactless visualization system (1) according to any of the preceding claims, characterized in that the at least one cutout (50, 51) comprises two cutouts (50, 51) which are formed in the mount (32) and the centers of which are spaced apart from one another by 60° to 180° in the circumferential direction.

5. Contactless visualization system (1) according to any of the preceding claims, characterized in that, at the free end (31), the at least one cutout (50, 51) extends through 20° to 70° in the circumferential direction.

6. Contactless visualization system (1) according to any of the preceding claims, characterized in that the at least one cutout (50, 51) extends in the wall (30) from the free end in the direction of the first lens element (271) such that the at least one cutout (50, 51) ends above of the first lens element (271) and hence a predetermined height of the wall (30) still is present below the at least one cutout (50, 51).

7. Contactless visualization system (1) according to any of the preceding claims, characterized in that the wall (30) is formed as a one-piece part together with the first lens element (271).

8. Contactless visualization system (1) according to any of the preceding claims, characterized in that at least one passage opening (47, 48, 49) is formed in the wall (30) in order to be able to remove liquid possibly present in the intermediate space between the first and second lens element (271, 272) .

9. Contactless visualization system (1) according to Claim 8, characterized in that the at least one passage opening (47, 48, 49) is formed closer to the first lens element (271) than the second lens element (272).

10. Contactless visualization system (1) according to Claim 8 or 9, characterized in that a plurality of passage openings (47, 48, 49) are formed in the wall (30) and spaced apart from one another in the circumferential direction.

11. Contactless visualization system (1) according to any of Claims 8 to 10, characterized in that the first lens element (271) comprises a boundary surface (36) which faces the second lens element (272) and has a curved form, with the at least one passage opening (47, 48, 49) comprising a lower edge (471, 481, 491) which borders on the boundary surface (36) of the first lens element (271).

12. Contactless visualization system (1) according to any of Claims 8 to 11, characterized in that the at least one passage opening (47, 48, 49) is arranged offset with respect to the at least one cutout (50, 51) in the circumferential direction.

13. Contactless visualization system (1) according to any of the preceding claims, characterized in that the mount (32) is in the form of an elastic clamping holder (43, 44, 45).

14. Contactless visualization system (1) according to any of the preceding claims, characterized in that an ophthalmic loupe support (4) is provided and the ophthalmic loupe (3) is mechanically connected thereto, said ophthalmic loupe support serving to position the ophthalmic loupe (3) in front of the patient's eye (6), wherein preferably the ophthalmic loupe (3) is detachably connected to the ophthalmic loupe support (4).

15. Surgical microscope (2) for eye surgery, wherein the surgical microscope (2) comprises a contactless visualization system (1) according to any of the preceding claims.