JPS63127737A - Fixation lamp apparatus in operation microscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for fixing the patient's viewpoint by showing the patient an index when performing eye surgery, and at the same time displaying the center point of the pupil to the doctor. , relates to a fixation lamp device used in a surgical microscope.

[Conventional technology]

When making a mark in the center of the eyeball during surgery for myopia or astigmatism, it is difficult to see the center of the pupil, so a light spot is created on the cornea at the center of the pupil, and the doctor uses this as a guide to make a mark with a needle. I have to. This is done by aligning the center hole (hl) of the radial low left (K) (see FIG. 6) so that the mark (C) made by the needle on the corneal surface (see FIG. 5) is in the center, and then ) is pressed against the eyeball and a scalpel is inserted into the concave area (see Figure 5).This surgery is performed for the purpose of loosening the cornea and removing distortion.

In such cases, instead of applying a thin beam of light to the center of the eyeball to create a light spot, the conventional method is to have the patient gaze at a light spot in front of the eye and use a needle to mark a virtual image of the light spot reflected on the corneal surface. I was trying to include it. That is, by having the patient stare at the filament of the light bulb in the illumination system of the surgical microscope, or by having the patient stare at a light emitting diode near the objective lens of the surgical microscope to fix the viewpoint, a virtual image of the light spot reflected on the cornea can be created. I was trying to use .

However, the method of forcing the patient to stare into the filament of a light bulb has the drawback that the patient is dazzled, and the method of using a light emitting diode has the drawback that it is difficult for the patient to see.

The present invention has been made in view of the above points, and has the effect of a fixation point that allows a clear virtual image of a light point to be formed on the corneal surface without dazzling the patient or making it difficult to see. The purpose of the present invention is to provide a fixation lamp device for a surgical microscope.

[Means for solving problems]

In the present invention, a surgical microscope is provided with a pair of objective lenses and an illumination lens whose optical axis is approximately parallel to the optical axis of the objective lenses in a position close to the objective lenses, and the optical path of the illumination lenses can be opened or blocked. , and an illumination beam diaphragm means is disposed in the surgical microscope so that a part of the optical path can be used as a light spot of a fixation lamp when the optical path is blocked.

[Effect]

In the apparatus of the present invention, when the illumination beam diaphragm means is separated from the optical path of the illumination lens of the illumination system of the surgical microscope to open the optical path, the illumination system can be used as a normal surgical light, and the illumination beam is placed in the optical path. When the diaphragm enters and blocks the optical path, the optical path is blocked leaving a pinhole portion of the illumination beam diaphragm, and the light spot at the pinhole forms a fixation light for fixing the patient's viewpoint. .

〔Example〕

Embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 4 show a first embodiment of the fixation lamp device of the present invention, and FIG. 1 is a cross-sectional view of the main components of the fixation lamp device in use in a surgical microscope. FIG.

The surgical microscope (8) is attached to an elevating holder 01 of a stand (not shown), and is freely movable up and down relative to the patient's face. , (Ll), the patient's eyeballs can be observed. A pair of observation objective lenses (Ll) at the bottom of the microscope are located close to each other and equidistant from the optical axis (Ll), which is approximately parallel to the optical axis (0tr) of each objective lens (Ll).
An illumination lens (L2) is arranged, and illumination light is introduced from an external light source (not shown) through the light guide α1, passes through the lens (h) and the optical path conversion mirror αυ, and is then transmitted from the illumination lens (sh) to the illumination light flux (R ) is designed to irradiate the patient's eyeball. The lens barrel (4) of one of the pair of objective lenses (Ll) is equipped with a shutter blade with a pinhole (2) in order to narrow down the illumination light flux (R) when forming a fixation lamp. Aperture plate that also serves as (3)
is rotatably provided around the lens barrel (4), and an actuation ring (rotatably provided at the bottom of the main body of the microscope (A)).
), by turning the operating lever aS installed on the outside of the aperture plate (3) through the bottle (161 installed on the opposite side of the pinhole (2) of the aperture plate (3)). The optical path of the illumination lens (1, 1) is opened or closed by rotating the illumination lens (1, 1) at the illumination window Q [0 part. In other words, the optical path of the illumination lens (Lx) is opened [Fig. (a)
, Fig. 3], by turning the operating lever α9 clockwise (see Fig. 2 (al)) from above, the illumination window α is shielded and the pinhole drilled in the aperture plate (3) is turned. C almost coincides with the optical axis (12) of the illumination lens (2), most of the illumination light flux (R) is blocked, and part of the illumination light flux passes through the pinhole (2) to form a fixation lamp. The light spot can be observed from the patient side [Fig. 1, Fig. 2 (b), Fig. 4]
See figure]. If the patient is made to gaze at the pinhole (2) in this state, the pupil (2) on the corneal surface of the patient's eyeball
A virtual image of the light spot of the pinhole (2) is formed approximately at the center of the pinhole (2), and the doctor can use this as a landmark to mark with a needle in preparation for the next surgery. In addition, by performing the opposite operation to the above, that is, turning the actuating lever Qt9 counterclockwise when viewed from above (see Fig. 2 (see BL)), the optical path of the illumination lens (S2) is opened [Fig. a), Fig. 3], the patient's eyeball is illuminated by the illumination light beam (R) emitted from the illumination window Ql, and the surgery can be performed.

7 and 8 show a second embodiment of the fixation lamp device of the present invention, in which the position of the light spot of the fixation lamp at the bottom of the surgical microscope (A) is measured using a pair of observation objective lenses. (Ll), (Ll), and when the objective lenses (Ll), (Ll) are used to observe the patient's eyeball, the virtual image of the light spot of the fixation lamp is accurately focused on the pupil. It is designed so that it can be formed in the center.

That is, a pair of observation objective lenses (Ll) at the bottom of the surgical microscope (A), and an aperture plate (3) equipped with a pinhole (2) for forming a fixation lamp are arranged at the lower center of the pair of observation objective lenses (Ll). A fixed rectangular prism (9) for guiding illumination light is disposed on the upper surface of the prism. On the other hand, the shutter blade Q3) is centered around the lens barrel (4) of one of the observation objective lenses (Ll).

are arranged in the same manner as the diaphragm plate (3) which also serves as the shutter blade in the first embodiment, and the operating ring (2) rotatably provided at the bottom of the microscope (A) is connected to the operating lever (
Figure 8 (11) rotates the shutter blade α by
) When the right angle prism (8) is rotated and positioned so as to block the optical path of the illumination lens (Ll) as shown in FIG. The moving rectangular prism (8) is attached to the shutter blade (2) so that the center of the light receiving surface (5) is located. When the light path of the illumination lens (L,) is blocked by the shutter blade Q31, the light-receiving surface (5) of the moving right-angle prism (8) faces the lower surface of the illumination lens (L,), and the light-receiving surface (5) is moved by the shutter blade α. (5) around the shielding part (7
) are formed, and the reflective surface of the moving right-angle prism (8) causes the light guide α to have an empty lens (Ll),
Illumination light guided through the optical path exchange mirror αυ and the illumination lens (Lx) reaches the fixed right-angle prism (9). Therefore, when the illumination optical path is blocked by the shutter blade α, the pair of objective lenses (Ll), (Ll)
A part of the illumination light is emitted through the pinhole (2) at the center of the fixed diaphragm plate (3) by the reflecting surface of the fixed right-angle prism (9) at the lower center between the two, forming a light spot as a fixation lamp. Ru. When the patient is made to gaze at the pinhole (2) in this state, a virtual image of the light spot of the pinhole (2) is formed at the exact center of the pupil (21) on the corneal surface of the patient's eyeball. In the above, by rotating the actuating lever α to a predetermined position in the opposite direction to that when forming the fixation lamp, that is, clockwise in FIG. Then, the optical path of the illumination lens (Ll) is opened, and the patient's eyeball is irradiated with the illumination light beam, so that the eyeball observation 2 surgery can be performed.

In the second embodiment, a fixation lamp is formed at the center between the pair of objective lenses (Ll) by using a pair of prisms consisting of a moving right-angle prism (8) and a fixed right-angle prism (9). However, it is also possible to form a fixation lamp in the center between the objective lenses by guiding the frontal light flux from the illumination lens using a flexible light guide, for example, without using a prism. be. Further, without departing from the gist of the present invention, it is also possible to make various changes, such as replacing the illumination light flux diaphragm with the above-described embodiment and using a crimson diaphragm.

Furthermore, it goes without saying that the operation for switching the illumination beam diaphragm means is not limited to the actuation lever of the above embodiment, and any other means can be used.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when a surgical microscope is used to mark the center of the pupil of the cornea of the patient's eye during surgery for myopia, astigmatism, etc., the patient feels glare. In addition, in order to make it easier for the patient to see, a fixation point can be formed using a part of the illumination light beam by a simple switching operation, and there is no need for a separate light emitting body for the fixation light, making it easier for the patient to see. It is possible to provide a fixation lamp device for a surgical microscope that is easy to see and operate, has a simple structure, and is advantageous in terms of cost.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a vertical cross-sectional side view of the main parts of the first embodiment of the fixation lamp device of the present invention in a state of use, and FIG. Fig. 2(b) is a plan view showing the main part of the switching part of the illumination beam diaphragm means in the state during illumination; FIG. 3 is a perspective view showing the first embodiment of the surgical microscope equipped with a fixation light device, and is a diagram when the illumination system is used as a surgical light; FIG. is a perspective view showing a state in which a fixation lamp is formed by switching the illumination beam diaphragm means of the fixation lamp device in Fig. 3; Figure 6 is a perspective view showing the radial row left, Figure 7 is
FIG. 8 is a longitudinal cross-sectional side view of the main parts of the second embodiment of the fixation lamp device of the present invention in the usage state (al is a plan view showing the main parts of the switching section of the illumination beam diaphragm means in FIG. 7; FIG. 8(b) is a plan view showing the main part when the fixation light is formed by switching the state of FIG. 8(al). (1)・- - Illumination beam diaphragm means, (2) - pinhole, (31 - aperture plate, (4) - objective lens barrel, (5) - light receiving surface of light guiding means, (7) -・-Shielding unit, (8)-Moving right-angle prism, (9)...-Fixed right-angle prism, (1+)-m-Observation objective lens, (
L2)--Illumination lens, (R)--Illumination luminous flux. Patent applicant Konan Camera Institute Co., Ltd. (and 2 others) Figure 2 (Q)!

Claims (1)

[Claims] 1. In a surgical microscope equipped with a pair of observation objective lenses and an illumination lens that is close to the objective lenses and has an optical axis substantially parallel to the optical axis of the objective lenses, the optical path of the illumination lenses is A feature of the present invention is that an illumination beam diaphragm having a pinhole is provided so that the optical path can be opened and closed so that a part of the optical path can be used by blocking it, so that a fixation lamp can be formed at any time. Fixation lamp device in surgical microscope. 2. The illumination beam diaphragm means is characterized in that a diaphragm plate having a pinhole is rotatably attached to the lens barrel of one objective lens. Fixation lamp device in surgical microscope. 3. The illumination beam aperture means is characterized in that a light guide means is provided so that the light receiving surface can be retracted from the optical path of the illumination lens to an aperture plate having a pinhole attached to the center between the pair of objective lenses. A fixation lamp device in a surgical microscope according to claim 1. 4. The light guiding means includes a movable right-angle prism that is rotatable about the lens barrel of one objective lens and has a shielding portion on the outer periphery of the light-receiving surface, and a fixed right-angle prism on the back of the aperture plate. A fixation lamp device in a surgical microscope according to claim 3, characterized in that it comprises: