JPH01500009A - Split light device for eye treatment using laser - Google Patents

Abstract

The slit lamp for the laser treatment of the eye comprises a projector (4) wherein an image of the eye to be treated (2) is incorporated by reflection in a beam path (1), a laser (7) arranged so that its beam may be directed to the portion of the eye to be treated and a control unit (10) which, amongst other things, controls the energy of the laser beam. The device is characterized by: in the image incorporated by reflection of the projector (4) the region or regions to be treated are marked, and the control unit (10) directs the laser (7) to the marked region.

Description

[Detailed description of the invention] Background of the invention of a split light device for rat treatment using a laser The invention relates to the treatment of eyes using a laser according to the introductory part of claim 1. This invention relates to a divided light device.

state of technology The divided light device according to the introduction of claim 1 is provided by way of example in the Federal Republic of Germany. It is well known from Japanese Patent Publication No. 3425975. The split light device is used to treat eye blood. A projection device is provided for projecting the tube contrast onto the examination light path.

In the case of the divided light device known from German Patent Publication No. 3425975, surgery The person not only matches the projected visual display with the image actually seen, but also matches the subject's clothing. Even with the slightest movement, the laser must be constantly "adjusted."

The above two operations, the examination light beam in order to match the angiography with the visible display of the fundus, as an illustration Adjusting the split light and directing the laser to the coagulation location are This will put a lot of pressure on people. Therefore, this kind of pressure is due to surgical negligence. This can lead to unfavorable treatment results.

Therefore, another type of device has been proposed, which synchronizes the laser beam with the movement of the eye. An indirect ophthalmoscope equipped with a control device is used (Arbo, Abstracts). Arv.

AbStraCtS) Volume A, Summary No. 4). This prior art device has A video processing device is provided to analyze the images conveyed by the image pointing device. front neck A clear site, for example a branch blood vessel, can be selected.The control device also allows you to select the treatment position and The laser is applied in such a way that the distance ratio to the marked area remains constant throughout the treatment. Adjustment results in the known device in the way the light beam is adjusted. Ophthalmologist sales The image processing device that can be realized at present at an affordable price takes all instruction parts into account. Analysis of the entire back side of the eye in real time, which is necessary to achieve adjustment even when the eye is inserted, is The reason for this approach is that it cannot be used as an example.

However, the above-mentioned well-known device does not allow ``morphologically'' similar regions to be analyzed by typical processing devices. It does not take into account what may occur within the human eye, for example, branching blood vessels.

Therefore, in the case of quick eye movements, the control device will act as the initially selected site. to indicate “morphologically similar” vessel bifurcations, and to maintain this region at a constant distance ratio. It is possible that the body part may be mistaken as a part of the body that is held. In such a case, the control device The laser must be positioned in a different area from the treatment area. said well known Further elaboration is needed to demonstrate that unacceptable damage to the eye can occur when using this device. There isn't.

The object of the invention is to: On the one hand, it facilitates the surgery, and on the other hand, it eliminates mistakes due to incorrect alignment of the laser and other The objective is to improve the split light system by eliminating all causes.

The realization of this object according to the invention is explained in the appended claims.

With this invention, one of the mistakes in laser therapy and especially in the case of laser coagulation There are many reasons for this, but when the surgeon notices that certain tissues Because the tissue of the possible treatment location is similar, the site may be misidentified and treated during treatment. It's time irritating. According to the invention, for this purpose a visible It stipulates that the display be projected using a projection device. these markings In this example, the use of I can do it.

As another aid to the operator, the control device directs the laser beam to the mark. The method is to make preliminary position adjustments in such a way as to focus the light on the position where it is attached.

The combination of these characteristics allows the treating ophthalmologist to decide when to actually begin treatment. At a convenient time in advance, mark the treatment position on a visible display of the eye to be treated and, illustratively, , it is possible to plan the surgery by locating and marking the coagulation location. Become. The patient remains in the operating chair throughout the treatment, during which time, as experience has shown, When rapid action is required, the control device provided by this invention - pre-positioning the light beam for the ophthalmologist, whereby said pre-positioning is good; However, it is possible to make the necessary modifications and then fire the laser beam. Convince the Ti doctor that something is true.

On the other hand, using the combination of inventive characteristics, the operator, i.e. the treating ophthalmologist, can: As an illustration, we used a visual display further superimposed on a monitor showing the entire back side of the eye. You can check the alignment of the laser beam at any time.

The surgeon can check whether the superimposed visual display matches the actual image of the eye over the large area. ``Laser hit'' occurs when two similar parts are mistakenly matched to each other. I can't wake up. Even though the invented device requires very little calculation , as an illustration, it is necessary to check behind the very strong tissues of the eye, although not all However, you only need to align the laser beam with the marking.

The idea is that the ophthalmologist should be able to freely select the laser beam during treatment. On the other hand, further adjustment is also possible manually according to claim 16).

Therefore, the use of the inventive segmented light can lead to time-consuming treatments and inaccurate but often Often performed only manually, but freed from professional responsibilities during actual treatment This can relieve the stress of ophthalmologists who are providing treatment without any complications.

The divided light of this invention can be used conveniently for treatment of the fundus as well as treatment of the front part of the eye such as the cornea. In addition, it can be used in the visible and ultraviolet ranges as well as in the infrared range. Suitable for use in conjunction with full-wavelength treatment lasers.

It is also possible to use a separate target laser.

Further, embodiments of the invention are detailed in the appended claims 1 to 14. .

An image sensor for detecting the eye to be treated, as detailed in claim 2. The control device is equipped with the following. The video sensor, for example a television camera, As an illustration, it can be used as an alternative to eye treating on a control monitor.

However, the output signal from the video sensor is also used by the video processing device (Claim 3). and in this way can initiate various control or regulation path processes. I can do it.

By way of illustration, the control device according to claim 4 may be configured such that when the eye moves, the operator can The actual image, for example, a visual display that has been projected to match the fundus and has been pre-positioned. can be adjusted. In this way, the operator can confirm that the observation light path is the imaging visible display at the beginning of the treatment. It is only necessary to fix the observation beam path in such a way that it matches. This person According to the law, all that is required is that the operator, at the beginning of the treatment, compare the projected visual display with the actual image of the eye. The surgery becomes even easier because you only have to be careful to match the image.

For example, the adjustment can be made using the previously cited ARVO-Abst. racts).

Nevertheless, the device of the invention is characterized in that the control device is used as the basis for the entire projected visual display. It has the advantage of immediately recognizing a different position as a reference site: The ophthalmologist then switches off the device, but can make corrections.

Said projected visual display is, by way of example, disclosed in German Patent Publication No. 3425975. can be projected in the manner detailed in the issue and illustratively matched as follows: Nislide can be projected by placing a zoom lens in the observation optical path. Make sure the slide is correct. Replace it with a zoom lens? : When adjusted and fully enlarged, the projected visible display will be visible to the eye. The agreement with the actual picture can be achieved. These processes are illustrated with examples and servo motors. It can be carried out using data.

Since the video visual display can be processed using video processing, the projected visual display can be processed using video processing. It is particularly preferred that the video be visible and therefore, by way of example, marked The location can be easily marked on the appropriate video processing input device. In addition, the video can be The visual display is on a monitor, illustratively scrolling, and on sized compatible hardware. optical elements without the need for mechanical conversion using hardware or software. Easy to adjust.

In order to compensate for eye movement, the control is provided as detailed in claim 5. The control device adjusts said segmented light microscope with an observation optical path, illustratively a projected visual display. is also possible.

As detailed in claims 8 and 9, the invention provides: The control device controls the corneal coagulation position or incision, laser beam output, firing distance, etc. It is equipped with a storage device that can store treatment/q parameters such as.

The above-mentioned treatment parameters are always entered into the memory in M [Documentation scientific and/or It also makes legal evaluation possible.

In this connection, the control device may be equipped with a recording printer as an example of an output device. , the essential and actual treatment/q parameters can be read (Claim 10).

The parameters indicated for treatment as well as the actual parameters are visible on the monitor. It is particularly advantageous (claim 11) if the parameter ・It is still more convenient if - is correlated to the respective marking (claims (section 12).

The control device can also be used to perform various safety functions: As described in claim 13, the device of the present invention is characterized in that the projected visual display is that of the eye. It stipulates that treatment should be discontinued if the agreement quickly becomes insufficient.

Also, the laser beam should be stopped when the white discoloration of the fundus reaches a certain level. Can be done.

Brief description of the drawing The present invention will be further clarified by detailed description of preferred embodiments below with reference to the accompanying drawings. It could be done in white: the only drawing shows a schematic diagram of the device of the invention.

Description of preferred embodiments of the invention The segmented light device of this invention is combined with a prior art observation microscope (11, illustratively for inspection and Eye to be treated (2) Equipped with a split light device that allows full observation. The observation microscope (1) , magnification changer (3), eyepiece system (3) and standard visible display. The projection device (4) for In the preferred embodiment described, the mark The projection device (4) for semi-visible display projection is equipped with a video monitor (5). Ru. Additionally, for the laser (7), the laser beam is directed to a specific location on the eye to be treated. Projection device (6) with beam manipulator (8) that allows position adjustment Prepare. (9) shows a divided light of the divided light device.

A control device αq, which is shown only schematically, has a calculation t! suitable for image processing. &aυ, control Monitor A2, human mouse α4) We can provide as much keyboard as possible, Display/Shunel a5I, image storage device αe, treatment eye (2) Full-detection image sensor server C17) and an external storage device α■, as an example a diskette drive and a printing device. A video monitor (6) is provided as in (2).

The control device 00); Well, not only the power and laser firing time, but also the beam manifold. The point of impact of the laser beam on the eye was also given to the projected image by the purator (8). Adjust in such a way that the marking and laser beam coincide. Furthermore, control device a 1, the operator aligns the projected image, which has been matched with the eye, with the eye to be examined. moreover, The control device is configured to control the split light device or another examination device before the actual treatment. This enables manipulation of recorded images. In this way, as an illustration, the chief ophthalmologist plan the treatment, such as coagulation or cut location, laser power, etc., but do not assist with the actual treatment. You can leave it in your hands.

The invention has been described in detail above using preferred embodiments. Of course, various corrections is possible within the full scope of the invention; by way of example, said control device may also be It is possible to take over the responsibility of adjusting other equipment. For example, the patent publication of the Federal Republic of Germany 3024169 or 3306981. The laser output can be adjusted by

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Claims (16)

[Claims] 1. a projection device (4) for projecting a visible representation of the eye to be treated (2) in the observation optical path (1); ), a laser (7) whose light beam can be directed to the position of the eye to be treated, and a laser comprising, among other things, an electronic control device (10) for adjusting said laser output; (a) In a split light device for eye treatment using the projection device (a), the treatment position is 4) mark the visible display projected by the control device (10); and (b) the control device (10) A device comprising positioning said laser (7) at the marked position. 2. The control device may be equipped with an image sensor (17) for detecting the eye to be treated. A split light device for eye treatment using a laser according to claim 1, characterized in that Place. 3. A claim characterized in that the control device is equipped with an image processing device (11). A segmented light device for eye treatment using the laser according to item 2. 4. The control device can be manually matched by the operator as the eye to be treated moves. 4. A laser according to claim 3, characterized in that said projected visual display is adjusted. A split light device for eye treatment that uses 5. The control device can be manually matched by the operator as the eye to be treated moves. Claim 4, characterized in that the observation optical path is aligned with the projected visible display. A segmented light device for eye treatment that uses a laser mounted on the screen. 6. The projected visual display is a video visual display. A segmented light device for eye treatment using the laser according to any one of items 1 to 5. 7. Marking the treatment location on the video visual display using video processing. Using the laser described in any one of claims 1 to 6 characterized in Split light device for eye treatment. 8. The control device is provided with a storage device into which treatment parameters can be input. Using the laser according to any one of claims 1 to 7, characterized in that A segmented light device for eye treatment. 9. Claims characterized in that actual treatment parameters are entered into said storage device. A segmented light device for eye treatment using the laser according to item 8. 10. Claims characterized in that the control device is provided with an output device (20). A segmented light device for eye treatment using the laser according to item 8 or 9. 11. Projecting the required and/or actual treatment parameters into the observation optical path. The laser according to any one of claims 8, 9, or 10, characterized in that A split light device for eye treatment that uses 12. Said treatment parameters can be identified by marking them in the projected visual display. The laser according to any one of claims 1 to 11, characterized in that: A split light device for eye treatment that uses 13. The control device controls when the projected visual display is insufficiently matched with the eye image. Any one of claims 1 to 12, characterized in that the treatment is interrupted. A split light device for the treatment of the eye using the described laser. 14. The control circuit is characterized by being equipped with a detector that indicates white discoloration of coagulation. An eye treatment using the laser according to any one of claims 1 to 13. Treatment split light device. 15. Claim 1, wherein the control device adjusts laser output. A split light device for eye treatment using the laser according to item 14. 16. The laser beam may further be manually adjusted in position. Therapeutic segmentation of the eye using a laser according to any one of items 1 to 15 Light equipment.