JP2762295B2 - Contact lens device with mirror for diagnosis and surgery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention enables observation of the fundus through a slit microscope, or irradiates a desired portion of the fundus with a light beam for coagulation while performing such observation. The present invention relates to a contact lens device with a mirror for operation and diagnosis which can be used together with a device for performing coagulation surgery.

(Prior Art) A trihedral contact lens is used for fundus examination of the posterior vitreous part of the eyeball and the retina. The trihedral contact lens has a concave lens surface in contact with the corneal surface of the subject's eye on the front, and a flat surface facing the examiner's eye via a microscope on the back, and furthermore, 73 °, 67 °, 59 It has three total reflection mirrors at an angle of ° on the side.

The usage of the trihedral contact lens will be described. After eye anesthesia, a few drops of scopizole are inserted into the concave surface of the trihedral contact lens, and the trihedral contact lens is attached to the eye. While rotating the contact lens fixed to the frame with a finger, various peripheral retinal parts can be observed through a slit microscope using a total reflection surface mirror at an appropriate angle.

(Problems to be Solved by the Invention) Conventionally, rotation of a contact lens with a mirror for diagnosis and surgery has been performed by moving a finger while holding the fixed frame to which the lens is fixed with the finger. However, the rotation of the lens by the held finger has a limit on the rotation angle that can be rotated. For this reason, when it is desired to rotate the lens beyond the limit rotation angle, the contact lens with a mirror for diagnosis and operation is temporarily removed from the eye to be examined, and the contact lens with the mirror is rotated by a required amount, and then the contact lens is again rotated. It had to be worn on the eye to be examined, which was inconvenient for operation.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks. The present invention has been made to solve the above problem. It is an object to provide a lens device.

(Means for Solving the Problems) In order to achieve the above object, in the contact lens device for diagnosis and surgery of the present invention, the contact lens device corresponds to the first surface on the examiner side and the corneal surface of the eye to be examined. Having a second surface having a curved curvature, and a second surface having an optical axis interposed between the first surface and the second surface.
A plurality of total reflection surfaces inclined to the surface side, a lens barrel member that rotatably supports the contact lens around the optical axis, and a rotation unit for rotating the contact lens in the lens barrel member. It was configured to be equipped.

(Example) An example will be described with reference to the drawings.

FIG. 1a is a side view of a contact lens device with a mirror embodying the present invention. The lens device 1 includes a contact lens 3, a fixed lens barrel 4, and a rotating lens barrel 5 that are concentrically arranged along the optical axis 2. Since the lens 3 is fixed to the rotating lens barrel 5 and is a single body, The lens 3 can be rotated by rotating the rotary barrel 5 with another finger while holding the fixed barrel 4 with one finger.

FIG. 1b is a longitudinal sectional view of the contact lens device with a mirror 1 shown in FIG. 1a. The contact lens 3 has a flat first lens surface 6 facing the examiner's eye via a microscope, and an eye E to be examined. A concave second lens surface 7 corresponding to the corneal surface K of
Three total reflection surfaces which are provided between the first lens surface and the second lens surface and are inclined toward the second lens surface with the optical axis 2 interposed therebetween, and which form a required inclination angle with respect to the first lens surface 6 Lens barrels 8, 9 and 10;

Therefore, the light emitted from the fundus rim M of the eye E to be examined passes through the center of the vitreous body G of the eye E, is reflected by the total reflection mirror 8, travels parallel to the optical axis 2, and is flattened by the lens 3. Since the light is perpendicularly incident on the surface 6, the examiner can observe an image of the fundus rim M through a slit microscope (not shown) arranged behind the flat surface 6.

FIG. 1c is a rear view of the contact lens device with mirror 1 shown in FIG. 1a. In the figure, reference numeral 5 denotes the rotating barrel, and a circular area limited by the rotating barrel 5 is the first lens surface 6, and three areas A, B, and 3 on the lens surface 6. C is the three total reflection mirrors 8, 9 and
10 shows images from ten lenses 3.

The total reflection mirrors 8, 9 and 10 have an inclination angle of 73 °, 67 ° and 59 ° with the flat surface 6 of the lens 3, respectively, and are used for the fundus equator, the fundus extreme peripheral and serrated edges, and the fundus. Used for observing the anterior chamber angle. In FIG. 1c, a circular area D centered on the optical axis 2 is an image of the circular aperture of the second lens surface 7 by the lens 3, and the examiner looks into the lens 3 along the optical axis 2. Thereby, the posterior pole of the fundus located at the center of the fundus can be recognized in the area.

FIG. 2 is a view showing another embodiment of the contact lens device with a mirror 1 for implementing the present invention, and a side view is shown in FIG. 2a and a sectional view is shown in FIG. 2b. In FIG. 2a, the lens device 1 has a contact lens 3 that is rotatable around an optical axis 2. The lens 3 has a rotary button 26 attached to the top of a fixed lens barrel 4 and an elastic force of a first return spring 27. Each time it is depressed against the fixed barrel 4, it rotates with respect to the fixed lens barrel 4 by a predetermined angle. The lower opening 29 formed in the lower part of the fixed lens barrel 4 will be described later.

In FIG. 2b, a rotating lens barrel 5 is rotatably mounted on a fixed lens barrel 4 and supports the lens 3 in the same body. An opening 28 and a lower opening 29 are formed at the top and lower right of the fixed lens barrel 4, respectively.

An arm member 20 is also fitted to the fixed barrel 4, and the arm member 20 vertically penetrates the top opening 28, curves rightward in a quadrant arc, and then descends vertically again. It passes through the lower opening 29. The upper portion of the arm member 20 extends vertically to form a vertical extension, and a rotation button 26 is attached to the upper end of the vertical extension. Between the rotary button 26 and the top opening 28, a first return spring 17 is
And is interposed.

Referring to FIG. 3, which is a partially enlarged view of the arm member 20, the shaft 11 is erected on the arm member 20 at the point where the arm member 20 starts to draw a quadrant arc and descend vertically at the end. A feed claw 12 is mounted on the shaft 11. Below the feed claw 12, a second return spring 13 having both ends fixed to the arm member 20 is wound around a shaft 11 of the feed claw, and applies an upward rotational force to the feed claw 12. Rotational movement upwards on the feed pawl 12 is limited by a pin 14 erected on the arm member 20. The limit pin 14 defines a position at which the feed pawl 11 returns by the action of the second return spring 13 after rotating the lens 3 by a predetermined angle by a ratchet mechanism described later. After the completion of the rotation feed of the lens 3, the rotation button 26 also returns to the original position by the upward elastic force of the first return spring 27.

The rotation of the rotating barrel 5 is achieved by a ratchet wheel provided around the barrel 5.
This is performed by a ratchet mechanism consisting of a combination of a feed pawl 15 and a feed pawl 12 engaged with the same. That is, by pushing down the rotation button 26 with a finger in the direction of the arrow against the elasticity of the first return spring 27, the feed claw 12 rotatably mounted on the arm member 20 via the shaft 11 is rotated. The ratchet wheel 15 is rotated by a predetermined angle engaged with one tooth of the ratchet wheel 15. The rotating lens barrel 5 rotates by the predetermined angle in the direction of the arrow, and the lens 3 rotates by the same angle. The lens 3 rotates by an angle corresponding to the number of teeth of the ratchet wheel 15 by one operation of the button 26. If the required rotation angle of the lens 3 is greater than this angle, the button 26 is repeatedly pressed down until the required rotation angle is obtained.

FIG. 4 is a side view showing still another embodiment of the contact lens device with mirror 1 embodying the present invention. This embodiment is an example in which the lens 3 rotates in the opposite directions with respect to the optical axis 2 when two rotation buttons are operated by providing two sets of the lens rotation mechanism shown in the previous embodiment. .

In FIG. 4, the lens device 3 has a contact lens 3 rotatable about the optical axis 2, and the lens 3 has a first rotary button 36 mounted on the top of the fixed lens barrel 14 and a return spring.
Each time the lens is pushed down against the elasticity of 37, the fixed lens barrel is fixed at a predetermined angle.
It is designed to rotate with respect to. At the top of the fixed lens barrel 14, a second rotary button 16 is mounted, and
Each time the second rotation button 16 is depressed against the elasticity of the return spring 17, the second rotation button 16 is rotated by a predetermined angle with respect to the fixed lens barrel 14. However, the direction in which the lens 3 rotates with respect to the optical axis 2 when the first rotation button 36 is operated is opposite to the direction in which the lens 3 rotates when the second rotation button 16 is operated.

Therefore, according to this embodiment, it is possible to rotate the lens 3 in both directions with respect to the optical axis 2 by operating the two buttons separately.

In the lower part of the fixed lens barrel 4, two lower openings 39 and
Reference numerals 19 are provided corresponding to each of the two sets of lens rotation mechanisms.

(Effects of the Invention) Since the present invention is configured as described above,
The contact lens of the contact lens device with a mirror for diagnosis and operation can be rotated by a predetermined amount without removing the contact lens from the affected eye. For this reason, there is an effect that the diagnosis and the operation are facilitated and the time required for the diagnosis and the operation can be reduced.

[Brief description of the drawings]

1a is a side view of a diagnosis, a surgical contact lens device with a mirror according to an embodiment of the present invention, FIG. 1b is a longitudinal sectional view of the device of FIG. 1a, FIG. 1c is a rear view of the device of FIG. 1a, FIG. 2a is a side view of another embodiment of the contact lens device with a mirror, FIG. 2b is a sectional view, FIG. 3 is a partially enlarged view showing components of the embodiment shown in FIG. 2a, and FIG. It is a side view which shows another Example of the contact lens device with a mirror. DESCRIPTION OF SYMBOLS 1 ... Contact lens device 2 ... Optical axis 3 ... Contact lens 4 ... Fixed lens barrel 5 ... Rotating lens barrel 6 ... 1st surface, 7 ... 2nd surface 8 ... Total reflection surface 12 , 15 ... Rotary drive mechanism E ... Eye to be examined, K ... Cornea surface

Claims (1)

(57) [Claims] A first surface on an examiner side and a second surface having a curvature corresponding to a corneal surface of an eye to be examined, and a second surface on an optical axis sandwiched between the first and second surfaces; A mirror-equipped contact lens provided with a plurality of total reflection surfaces inclined to the lens, a lens barrel member rotatably supporting the contact lens about the optical axis, and a mechanism for rotating the contact lens in the lens barrel member. A contact lens device with a mirror for diagnosis and surgery, comprising: