JP4931408B2 - Ophthalmic surgery contact lenses - Google Patents

Description

  The present invention relates to a contact lens for ophthalmic surgery used in ophthalmic surgery such as retinal vitreous surgery.

  In retinal vitreous surgery, as shown in FIG. 8, a desired ophthalmic surgical contact lens 100 is held on the eyeball of a patient who is laid on his back, and the fundus image of the eyeball is observed through a surgical microscope. We are taking action. The procedure for holding the ophthalmic surgical contact lens 100 on the eyeball is performed as follows.

  First, the sclera 101 around the cornea (not shown) of the eyeball is exposed. Next, the metal fixing ring 102 is sewn to the sclera 101 with the surgical thread 103 around the cornea. Next, around the fixing ring 102 in the sclera 101, a light guide 104 for intraocular illumination, a vitreous cutter 105 for excising the vitreous body, an infusion tube 106 for injecting intraocular perfusate, and the like A wound port 107 is provided for inserting the surgical instrument in the eyeball. Thereafter, the ophthalmic surgical contact lens 100 is mounted and held on the fixing ring 102.

  However, the sewing of the fixing ring 102 to the sclera 101 as described above is an operation that sews the half layer of the sclera 101 so that it requires skill, even for a skilled operator. This is a work that requires attention and effort.

  In order to eliminate such difficult work, contact lenses for ophthalmic surgery that do not use the fixing ring 102 have been recently developed. For example, in the contact lens 110 for ophthalmic surgery shown in FIGS. 9 to 11, a fixing flange 112 is provided around the lens unit 111, and the lens unit 111 is held on the cornea 114 of the eyeball 113 by the flange 112. (Patent Documents 1, 2, and 3).

  Reference numeral 115 in FIGS. 10 and 11 denotes an opening 115 formed in the flange 112, and a wound opening for inserting a surgical instrument in a position corresponding to the opening 115 in the sclera 116 of the eyeball 113. Can be formed.

Japanese Patent No. 3623739 Japanese Patent Laid-Open No. 2003-24366 European Patent No. 1161705

  However, in the conventional ophthalmic surgical contact lens 110 shown in FIGS. 9 to 11, the eyeball 113 is not sufficiently held on the cornea 114, and when the eyeball 113 is tilted, etc. In some cases, the surgery may have shifted and the operation must be interrupted.

  Further, when a surgical instrument is inserted into the wound formed in the sclera 116 corresponding to the opening 115 of the flange 112, particularly when the lens unit 111 and the flange 112 are integrated, the ophthalmic surgery is performed. Even when the contact lens 110 is rotated, the surgical instrument and the flange 112 may interfere with each other and rotation of the contact lens 110 may be restricted. In this case, the ophthalmic surgical contact lens 110 cannot be rotated to sufficiently observe the inside of the eyeball 113.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a contact lens for ophthalmic surgery that can stably hold an optical part on the cornea without sewing a support part to the sclera. It is in.

  The invention according to claim 1 includes an optical unit for observing the inside of the eyeball and a support unit for supporting the optical unit on the cornea, and the back surface of the optical unit corresponds to the shape of the cornea. A first branch portion that is formed in a curved surface corresponding to the shape of the sclera around the cornea, the support portion extends outward in the diameter direction of the optical portion, and the first branch portion. And one or a plurality of second branch portions extending continuously from the branch portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, the support portion includes a second branch portion extending from a tip of the first branch portion in a direction intersecting with a longitudinal direction of the first branch portion. It is characterized by having been comprised.

  According to a third aspect of the present invention, in the first aspect of the present invention, the support portion includes a direction in which the second branch portion intersects the longitudinal direction of the first branch portion from the tip of the first branch portion and the longitudinal direction. It is characterized in that a plurality of pieces are extended in the same direction as the direction.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the support portion includes a gap portion extending in a circumferential direction of the optical portion by the first branch portion and the second branch portion. Is formed.

  The invention according to claim 5 is the invention according to claim 4, wherein the gap portion of the support portion is a surgical instrument inserted into a wound formed in the sclera corresponding to the gap portion, or a sclera. The size is set so as to be substantially in contact with the trocar driven into the vehicle.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the support portion is characterized in that a tip end of a second branch portion separated from the first branch portion is a free end. To do.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the support portion includes a support ring for detachably fitting the optical portion, and the first branch portion is provided on the support ring. This is characterized in that the base ends of these are joined.

  The invention according to claim 8 is the invention according to any one of claims 1 to 6, wherein the support portion is configured integrally with the optical portion, and a base end of the first branch portion of the support portion is the optical portion. It is characterized by being formed by joining.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein the support portion is any one of rubbers such as metal and silicone, or synthetic resins such as soft acrylic and hard acrylic resin. It is characterized by being composed of one material.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein the surface of the optical part has a plane, a convex surface, a concave surface, a plane having a prism, a convex surface having a prism, or a prism. It is configured by any one shape of a concave surface.

  According to the invention described in claim 1, 2, 9 or 10, the back surface of the optical part is formed into a curved surface corresponding to the shape of the cornea, and the back surface of the support part is formed into a curved surface corresponding to the shape of the sclera around the cornea. The support portion is formed and has a first branch portion extending outward in the diameter direction of the optical portion and one or a plurality of second branch portions extending continuously from the first branch portion. The part can contact the sclera in a wide range. As a result, the optical part can be stably held and supported on the cornea by the support part.

  According to the third aspect of the present invention, the support section includes a plurality of support sections in the direction in which the second branch section intersects the longitudinal direction of the first branch section from the tip of the first branch section and in the same direction as the longitudinal direction. Since it extends, the range in contact with the sclera is further expanded, so that the optical part can be more stably held and supported on the cornea.

  According to the fourth aspect of the present invention, since the gap portion extending in the circumferential direction of the optical portion is formed by the first branch portion and the second branch portion in the support portion, the gap portion is formed in the sclera. A wound opening for inserting a surgical instrument used for ophthalmic surgery can be provided at a position corresponding to the above, or a trocar for connecting a surgical instrument can be driven.

  In addition, since the gap portion of the support portion is formed to extend in the circumferential direction of the optical portion, the optical portion and the support portion are integrated, or the optical portion and the support portion are separate bodies, When the optical part is configured to be difficult to move by the action of frictional force or the like on the support part, and a surgical instrument is inserted into the wound formed on the sclera corresponding to the gap part, or a trocar is driven Even in this state, the optical part and the support part can be rotated. Therefore, the operability is improved particularly in the case of an optical part whose surface is a prism surface, and the inside of the eyeball can be observed well through this optical part.

  According to the fifth aspect of the present invention, the gap portion of the support portion is substantially in contact with the surgical instrument inserted into the wound formed in the sclera corresponding to the gap portion or the trocar driven into the sclera. Since the dimensions are set, the surgical instrument and the trocar also function as a fixing jig that fixes the support portion by pressing the support portion. Therefore, the support portion can more stably support the optical portion by a surgical instrument or trocar as a fixing jig.

  According to the invention described in claim 6, since the tip of the second branch part away from the first branch part is a free end, the dimensional tolerance when contacting the sclera increases. As a result, the optical unit can be stably supported even for eyeballs having different dimensions.

  Further, since the tip of the second branch portion in the support portion is a free end (especially an open free end), blood, a viscoelastic substance, a reflux fluid, and the like at the time of surgery can be quickly discharged. For this reason, a surgery can be advanced smoothly and the burden of a patient and an operator can be reduced.

  Further, since the distal end of the second branch portion in the support portion is a free end, even when a surgical instrument is disposed in a gap formed by the first branch portion and the second branch portion, the surgery is performed. The attachment and removal of the contact lens can be easily performed.

  According to the seventh aspect of the present invention, the support portion includes the support ring that detachably fits the optical portion, and the support portion and the optical portion are separated from each other, so that only the optical portion is supported. Can be rotated or exchanged relative to the part.

  According to the eighth aspect of the present invention, since the support portion is integrally formed with the optical portion, it is possible to prevent the loss of the optical portion and the support portion, etc., thus facilitating the handling of the surgical contact lens. it can.

The best mode for carrying out the present invention will be described below with reference to the drawings.
[A] First embodiment (FIGS. 1 and 2)
FIG. 1 is a front view showing a first embodiment of a contact lens for ophthalmic surgery according to the present invention. FIG. 2 is a side sectional view showing a state in which the ophthalmic surgical contact lens of FIG. 1 is attached to the eyeball. The ophthalmic surgical contact lens 10 shown in FIGS. 1 and 2 is used for ophthalmic surgery such as retinal vitreous surgery, and includes an optical unit 11 and a support unit 12.

  The optical unit 11 is for observing the inside of the eyeball 1 and is made of any one material of rubbers such as glass and silicone, and synthetic resins such as hard acrylic and soft acrylic. As shown in FIG. 12, the surface 11A of the optical part 11 has a flat surface 11AA, a convex surface 11AB, a concave surface 11AC, a flat surface 11AD having a prism, a convex surface 11AE having a prism, or a concave surface 11AF having a prism. Configured. Further, the back surface 11 </ b> B of the optical unit 11 is formed in a curved surface corresponding (adapted) to the shape of the cornea 2 of the eyeball 1.

  Accordingly, during ophthalmic surgery, the back surface 11B of the optical unit 11 is brought into contact with the cornea 2 of the patient's eyeball 1 so that the front surface 11A of the optical unit 11 faces the surgical microscope. Actually, a viscoelastic material is filled between the back surface 11B of the optical unit 11 and the cornea 2 of the patient, and the error between the two is eliminated.

  The support portion 12 supports and holds the optical portion 11 on the cornea 2 of the eyeball 1 and includes a support ring 13, a first branch portion 14, and a second branch portion 15. In particular, the back surface 16 of the first branch portion 14 and the second branch portion 15 is formed in a curved surface corresponding to (adapting to) the shape of the sclera 3 around the cornea 2 of the eyeball 1. The support 12 is made of any one material such as metal, rubber such as silicone, or synthetic resin such as soft acrylic or hard acrylic.

  The support ring 13 is for detachably fitting the optical unit 11, and is provided when the support unit 12 is configured separately from the optical unit 11, that is, separated. A pair of first branch portions 14 are disposed at positions facing the support ring 13. In other words, each first branch portion 14 is configured such that the base end 14B is joined to the support ring 13 and extends linearly or curvedly (in the present embodiment, linearly) outward in the diameter direction of the optical portion 11. The Then, the first branch portions 14 are continuously connected to the distal ends 14A of the first branch portions 14 and second from both sides of the distal end portions 14A in the direction intersecting the longitudinal direction of the first branch portions 14 and in the direction along the circumferential direction of the optical portion 11. The branch part 15 extends. These four second branch portions 15 are formed in a perfect circular shape as a whole. Due to the presence of the second branch portion 15, the area where the support portion 12 contacts the sclera 3 of the eyeball 1 becomes wide.

  The overall shape of the four second branch portions 15 described above may be an elliptical shape, an oval shape, a rhombus shape, or a polygonal shape. Moreover, the 1st branch part 14 may be extended from the support ring 13 in the range of 1-10. In addition, one or three or more second branch portions 15 may extend from the tip 14A of the first branch portion 14. Further, the support unit 12 may be configured integrally with the optical unit 11. In this case, the support ring 13 does not exist, and the base end 14 </ b> B of the first branch portion 14 is directly joined to the optical unit 11.

  Now, the tip 15A of each second branch 15 extending from both sides of the tip 14A of the pair of first branches 14 is as follows. That is, the distal ends 15A of the second branch portions 15 are not in contact with each other or overlapped with each other, or are not joined with contact with each other or overlapped with each other, or more preferably are configured to be separated from each other. At the end. As a result, the support portion 12 configured to include the first branch portion 14 and the second branch portion 15 has an increased dimensional tolerance when contacting the sclera 3 of the eyeball 1. Increases flexibility in contact.

  The support portion 12 is formed with a gap portion 17 that is surrounded by the first branch portion 14, the second branch portion 15, and the support ring 13 and extends along the circumferential direction of the optical portion 11. The gap portion 17 is continuously formed in the adjacent second branch portion 15 over a substantially semicircular region along the circumferential direction of the support ring 13 and the optical portion 11. In the sclera 3 of the eyeball 1, a wound 18 for inserting a surgical instrument at a position corresponding to the gap 17 can be formed. The surgical instrument is a light guide for intraocular illumination, a vitreous cutter for excising the vitreous body, an infusion tube for injecting intraocular perfusate into the eyeball 1, and the like.

  The gap 17 may be set to a size (width) that is substantially in contact with the surgical instrument inserted into the wound opening 18, that is, a size that is in contact with the surgical instrument or slightly smaller (width). In this case, the surgical instrument also functions as a fixing instrument for fixing the support part 12 to the sclera 3 by contacting the support part 12 around the gap part 17 and pressing the support part 12. In addition, instead of a surgical instrument, a trocar for connecting a surgical instrument may be driven on the sclera 3 through the gap 17, and the trocar may press the support portion 12 to function as a fixing instrument. .

With the configuration as described above, the following effects (1) to (9) are achieved according to the above embodiment.
(1) In the contact lens 10 for ophthalmic surgery, the back surface 11B of the optical unit 11 is formed in a curved surface corresponding to (adapts to) the shape of the cornea 2 of the eyeball 1, and the back surface 16 of the support unit 12 is the sclera around the cornea of the eyeball 1. 3, the support portion 12 extends from the both sides of the first branch portion 14 extending outward in the diameter direction of the optical portion 11 and the tip end 14 </ b> A of the first branch portion 14. And a second branch portion 15. As a result, the support portion 12 can contact the sclera 3 in a wide range, and the optical portion 11 can be stably held and supported on the cornea 2.

  (2) The support portion 12 in the ophthalmic surgical contact lens 10 is formed with a gap portion 17 that is surrounded by the support ring 13, the first branch portion 14, and the second branch portion 15 and extends in the circumferential direction of the optical portion 11. Therefore, a wound opening 18 for inserting a surgical instrument used for ophthalmic surgery is provided at a position corresponding to the gap 17 in the sclera 3 of the eyeball 1 or a trocar for connecting the surgical instrument is driven in. Can do.

  (3) Since the gap 17 of the support part 12 in the contact lens 10 for ophthalmic surgery is formed extending in the circumferential direction of the optical part 11, the optical part 11 and the support part 12 are integrated, or the optical part. 11 and the support part 12 are separate bodies, but the optical part 11 is configured to be difficult to move with respect to the support part 12 due to the action of frictional force and the sclera corresponding to the gap part 17. The optical unit 11 and the support unit 12 can be rotated as necessary even when a surgical instrument is inserted into the wound opening 18 formed in the state 3 or a trocar is driven. For this reason, in particular, when the surface 11A is the optical part 11 which is a prism surface, the operability of the contact lens 10 is improved, and the inside of the eyeball can be favorably observed through the optical part 11 of the contact lens 10.

  (4) The gap portion 17 of the support portion 12 in the contact lens 10 for ophthalmic surgery is driven into a surgical instrument inserted into the wound 18 formed in the sclera 3 corresponding to the gap portion 17 or the sclera 3. It may touch the trocar or be set to a slightly smaller dimension. In this case, the surgical instrument or trocar contacts the gap portion 17 and functions as a fixing jig that presses the support portion 12 around the gap portion 17 and fixes the support portion 12. Therefore, the support part 12 can support the optical part 11 more stably by a surgical instrument as a fixing jig. In particular, when the trocar is driven, the stability of the optical unit 11 is further increased, and at the same time, the wound 18 is not required to be provided in the sclera 3, so that post-operative healing is quick.

  (5) Since the support portion 12 in the ophthalmic surgical contact lens 10 is configured with the distal end 15A of the second branch portion 15 away from the distal end 14A of the first branch portion 14 at the free end, the sclera 3 of the eyeball 1 Increases the dimensional tolerance when touching and improves flexibility. As a result, the support unit 12 can stably hold and support the optical unit 11 even with respect to the eyeballs 1 having different dimensions.

  (6) Since the tip 15A of the second branch portion 15 in the support portion 12 is a free end, particularly a free end that is spaced apart from each other, blood, viscoelastic substances, perfusate, and the like during surgery can be quickly discharged. It becomes. For this reason, a surgery can be advanced smoothly and the burden of a patient and an operator can be reduced.

  (7) Since the distal end 15A of the second branch portion 15 in the support portion 12 is a free end, the operation is performed in the gap portion 17 formed by being surrounded by the first branch portion 14, the second branch portion 15 and the support ring 13. Even when an instrument or trocar is arranged, the attachment / detachment of the ophthalmic surgical contact lens 10 can be easily performed.

  (8) Since the support part 12 in the ophthalmic surgical contact lens 10 includes a support ring 13 that detachably fits the optical part 11, the support part 12 and the optical part 11 are separated from each other. Only the part 11 can be rotated relative to the support part 12 or replaced with another optical part 11.

  (9) When the support part 12 in the contact lens 10 for ophthalmic surgery is configured integrally with the optical part 11, the optical part 11 and the support part 12 can be prevented from being lost. It can be simplified.

[B] Second to sixth embodiments (FIGS. 3 to 7)
Next, second to sixth embodiments will be described with reference to the drawings. In each of these embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the ophthalmic surgical contact lens 20 according to the second embodiment shown in FIG. 3, a pair of first branch portions 14 extend from positions opposed to the support ring 13, and from the distal ends 14 </ b> A of these first branch portions 14. Each of the second branch portions 15 is configured to intersect with the longitudinal direction of the first branch portion 14 and extend in a direction along the circumferential direction of the optical portion 11. Therefore, this contact lens 20 also has the same effects as the effects (1) to (9) of the first embodiment. In addition, the ophthalmic surgical contact lens 20 has the following effects.

In the ophthalmic surgical contact lens 30 of the third embodiment shown in FIG. 4, one first branch portion 14 extends from one place of the support ring 13, and from both sides of the distal end 14 </ b> A of the first branch portion 14, The second branch portions 15 extend in the direction intersecting the longitudinal direction of the first branch portion 14 and in the direction along the circumferential direction of the optical portion 11. Therefore, this contact lens 30 also has the same effects as the effects (1) to (9) of the first embodiment.
In addition, the ophthalmic surgical contact lens 30 has the following effects. That is, since the first branch portion 14 is one and the gap portion 17 is formed to have a substantially circumferential length, a surgical instrument or a trocar is disposed on the sclera 3 corresponding to the gap portion 17. The degree of freedom when rotating the contact lens 30 as necessary increases.

  In the ophthalmic surgical contact lens 40 according to the fourth embodiment shown in FIG. 5A, a total of four second branch portions 15 extending from both sides of each tip 14A of the pair of first branch portions 14 are formed as a whole. As shown in FIG. Therefore, this contact lens 40 also has the same effects as the effects (1) to (9) of the first embodiment. In addition, the ophthalmic surgical contact lens 40 has the following effects. That is, the second branch portion 15 of the contact lens 40 is formed in an oval shape as a whole, and the range of contact with the sclera 3 of the eyeball 1 is enlarged, so that the optical portion 11 is more stably placed on the cornea 2. Can be held.

In the ophthalmic surgical contact lens 41 according to the modified example of the fourth embodiment shown in FIG. 5B, the total of the second branch portions 42 in the support portion 43 has an oval shape as a whole. In addition to being formed into a shape, the shape of the inner edge 45 is formed into a perfect circle as a whole. Accordingly, in the contact lens 41, the area of the second branch portion 42 that contacts the sclera 3 is larger than that of the contact lens 40, so that the optical unit 11 can be held on the cornea 2 more stably. it can.
Further, in the contact lens 41, the inner edge 45 of the second branch portion 42 is formed in a perfect circle shape as a whole, and the width of the gap portion 17 (the distance between the support ring 13 and the inner edge 45 of the second branch portion 42) is increased. The gap 17 is constant in the circumferential direction. For this reason, even when the contact lens 41 is rotated on the sclera 3 with a surgical instrument or trocar disposed in the gap portion 17, these surgical instruments are always in contact with the gap portion 17, Since the support part 43 around the part 17 is pressed, it can sufficiently function as a fixing device. As a result, the optical part 11 can be stably supported on the cornea 2 via the support part 43.

In the ophthalmic surgical contact lens 50 according to the fifth embodiment shown in FIG. 6, the pair of first branch portions 14 extend from the opposing position of the support ring 13. A second support portion 15 is provided starting from both sides of the tip end 14A of each first branch portion 14. That is, the second support portion 15 is provided in such a manner that it extends from both sides of the tip 14A in the direction intersecting with the longitudinal direction of the first branch portion 14 and along the circumferential direction of the optical portion 11. It is done. Further, another second branch portion 51 is formed so as to extend from each of the tips 14 </ b> A in the same direction as the longitudinal direction of the first branch portion 14. Therefore, this contact lens 50 also has the same effects as the effects (1) to (9) of the first embodiment.
In addition, the ophthalmic surgical contact lens 50 has the following effects. That is, in this contact lens 50, since the two second branch portions 15 and the one first branch portion 51 extend from the respective distal ends 14A of the pair of first branch portions 14, the support lens 50 is supported. The contact area of the part 12 in contact with the sclera 3 of the eyeball 1 is further expanded. As a result, the optical part 11 can be more stably held on the cornea 2.

  In the ophthalmic surgical contact lens 60 of the sixth embodiment shown in FIG. 7, the wide first branch portion 14 extends in the diametrical direction of the optical portion 11 from four positions of the support ring 13 facing each other. Then, from both sides of the tip end 14A of each of the first branch portions 14, the second branch portions 15 that intersect with the longitudinal direction of the first branch portion 14 and extend in the direction along the circumferential direction of the optical portion 11 extend. Composed. Therefore, this contact lens 60 also has the same effects as the effects (1) to (9) of the first embodiment. In addition, the ophthalmic surgical contact lens 60 has the following effects. That is, since the area of the first branch part 14 of the support part 12 is large, the optical part 11 can be further stabilized on the cornea 2 of the eyeball 1 by the first branch part 14.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.

1 is a front view showing a first embodiment of a contact lens for ophthalmic surgery according to the present invention. FIG. 2 is a side sectional view showing a state where the ophthalmic surgical contact lens of FIG. 1 is attached to an eyeball. It is a front view which shows 2nd Embodiment of the contact lens for ophthalmic surgery which concerns on this invention. It is a front view which shows 3rd Embodiment of the contact lens for ophthalmic surgery which concerns on this invention. It is a front view which shows 4th Embodiment of the contact lens for ophthalmic surgery which concerns on this invention. It is a front view which shows 5th Embodiment of the contact lens for ophthalmic surgery which concerns on this invention. It is a front view which shows 6th Embodiment of the contact lens for ophthalmologic surgery which concerns on this invention. It is a perspective view which shows the use condition of the conventional contact lens for 1st ophthalmic surgery. FIG. 10 is a side sectional view showing a conventional second ophthalmic surgical contact lens, in which (A) is a front view and (B) is a state in which the ophthalmic surgical contact lens of FIG. It is a front view which shows the conventional contact lens for 3rd ophthalmic surgery. It is a front view which shows the conventional contact lens for 4th ophthalmic surgery. It is a side view which shows the optical part of the contact lens for ophthalmic surgery shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Eyeball 2 Cornea 3 Sclera 10 Contact lens for ophthalmic surgery 11 Optical part 11A Surface 11B Back surface 12 Support part 13 Support ring 14 1st branch part 14A Front end 14B Base end 15 2nd branch part 16 Back surface 17 Crevice part 18 Wound 20 Ophthalmology Contact lens for surgery 30 Contact lens for eye surgery 40 Contact lens for eye surgery 41 Contact lens for eye surgery 50 Contact lens for eye surgery 51 Second branch 60 Contact lens for eye surgery

Claims (8)

An optical unit for observing the inside of the eyeball, and a support unit that holds and supports the optical unit on the cornea;
The back surface of the optical part is formed in a curved surface corresponding to the shape of the cornea, the back surface of the support part is formed in a curved surface corresponding to the shape of the sclera around the cornea,
The support portion includes a first branch portion extending outward in the diameter direction of the optical portion, and one or a plurality of second branch portions extending continuously from the first branch portion ,
The contact lens for ophthalmic surgery , wherein the support portion has a free end at a distal end of a second branch portion separated from the first branch portion . The ophthalmic surgery according to claim 1, wherein the support portion includes a support ring that detachably fits the optical portion, and the base end of the first branch portion is joined to the support ring. Contact lenses. 3. The ophthalmic surgery according to claim 1, wherein the support portion is configured such that the second branch portion extends from a distal end of the first branch portion in a direction intersecting with a longitudinal direction of the first branch portion. Contact lenses. The support portion is configured such that a plurality of second branch portions extend from the tip of the first branch portion in a direction intersecting with the longitudinal direction of the first branch portion and in the same direction as the longitudinal direction. The contact lens for ophthalmic surgery according to claim 1 or 2 . The aforementioned supporting portion, by a first branch and a second branch, for eye surgery according to any one of claims 1 to 4, characterized in that a gap extending in the circumferential direction of the optical portion is formed contact lens. The gap portion of the support portion is set to a size that is substantially in contact with a surgical instrument inserted into a wound formed on the sclera corresponding to the gap portion or a trocar driven into the sclera. Item 6. An ophthalmic surgical contact lens according to Item 5 . The said support part is comprised by any one material of rubbers, such as a metal and silicone, or synthetic resins, such as soft acryl and hard acryl, The said any one of Claim 1 thru | or 6 characterized by the above-mentioned. Contact lenses for ophthalmic surgery. The surface of the optical part, flat, convex, concave, plane with a prism, of claims 1 to 7, characterized in that it is constituted by any one of the shapes of the concave with a convex or prism has a prism The contact lens for ophthalmic surgery according to any one of the above.

Images