DE3111665A1 - Polarization haploscope - Google Patents

Abstract

The polarization haploscope is a universal device which permits binocular functions to be demonstrated and quantified, and special training of binocular vision to be carried out. It will primarily be used for patients with squint. Determination of the central visual acuity is possible as are aniseikonia determinations, i.e. differences in image size can be recorded for each eye. Use of the so-called Haiding's brush in free space expands the diagnostic possibilities. In addition, amblyopia can be accurately recorded and classified. Furthermore, accurate recording and follow-up of paralytic strabismus is possible. It is to be emphasized, in particular, that the natural conditions of vision, i.e. the conditions in free space, can be perfectly simulated and that work can be carried out virtually without any dissociation.

Description

Description / 3e. rbMLiq application for a patent title: ~ Polarization haploscope for diagnosis and training of binocular vision, as well as the improved diagnosis of paresis and amblyopia. "Fields of application: The invention relates to a device with which it is possible in a unique way to perform binocular functions to prove, quantify, as well as special training in binocular vision to be carried out, especially with strabismus patients.

In addition, amblyopia can be precisely recorded and classified as they occur among other things in strabismus patients.

Furthermore, precise experience and control of the paralysis squint is essential possible for the first time.

Purpose: Up until now, training in binocular visual acuity was a high one Personnel expenses required. Furthermore, it has not been used with any known device an exact definition of a form of amblyopia is possible, but what is required for the one to be carried out therapy is absolutely necessary. Furthermore, with previous devices, the frequently occurring Paresis of the musculus oblicus superior cannot be clearly identified, since the actual Function of the mueculus oblicus, namely the rotation under fusion conditions, does not could be measured. Rather, with previous test methods, the high Dissociation between phoria and paresis cannot be safely distinguished. The diagnosis was ultimately only put out of the clinical picture. It works for the first time with ours Device to produce reproducibility and standardizability, since the temporal Processes are standardized and repeated as often as required under absolutely identical conditions can be. Any therapeutic successes have thus become measurable.

State of the art: There are quite a few devices that do as well try to meet the above mentioned task. That is important The fact that none of the devices on the market in such universal Way can meet the requirements mentioned. The special function for which the devices on the market are designed, can also not with such accuracy, standardizability and reproducibility as with the device we developed. The following are the ones in question upcoming devices and compared with our device.

1. Aulhorn phase difference hagloscope: haploscopic vision is achieved with this device that alternately the visual impression of each Eye is suppressed, so that in the end each eye has a different image sees, from which a fusion image is put together.

1.1. The disadvantage of this device to our device is that the children are forced into an unnatural apparatus situation.

1.2. When using this device is a relatively high personnel expenditure required, as only one child at a time is properly trained can.

1.3. There is no reproducibility, since the angular velocity, depending on the examiner, is arbitrary and different.

1.4. There is a high degree of dissociation that hinders the flow, since no real stereo images are used.

1.5. An exact diagnosis of an existing amblyopia is with this Device impossible.

1.6. Real paresis diagnostics is not possible with this device actually only phories are measured.

2. Synoptophore or synotometer: With this device, too, children become forced into an unnatural apparatus situation, so that the objective finding can be significantly falsified. This device also does not offer the examination options which are given with our device.

The disadvantages of the Aulhorn device described in points 1 - 6 they are the same. For amblyopia diagnostics, there is occasionally a so-called Haidinger tufts present, but this allows the qualification of the binocular and monocular forms of amblyopia, since the Haidinger tuft is not binocular can be used under fusion conditions.

3. Hess curtain: This examination option is primarily Created for the purpose of diagnosing an existing strabismus, as well to control their course.

This test also only examines one phoria under full dissociating methods and only allows indirect conclusions to be drawn about a possible Paresis. The cyclorotation, for example, is not recorded with this test.

4. Bagolini glasses, Titmus test, ~ TNO ~ test These methods are for exclusive use evidence of binocular perception. In the presence of diplopia is found a false positive result.

Titmus test and TNO test are for evidence and purposes only Qualification of binocular vision, but fail in most patients, because of the high degree of dissociation, especially with reduced binocular vision cause alternating suppression.

An exact determination of the fusion width has not yet been possible as a result of constantly changing execution conditions. The mostly existing typical Device situation leads to incorrectly pointing angles.

The previous paresis diagnosis is extremely difficult because usually cyclorotation.

faults could not be recognized.

A bilateral and unilateral microstrabism without adjustment movement was previously not detectable.

So far, exercises have only been carried out for one on each of the devices mentioned single patient.

Only with our device is it possible to give group lessons.

Criticism of the state of the art: All patients with reduced binocular vision and strabismus problems have a highly developed ability, even at low levels Differences in the images received by both eyes mutually denote the zen t ra eri to suppress visual impression of an eye. This @ ability is @ necessary to avoid diplopia.

Because of this high ability to suppress, we obtain with the The test methods described above are false negatives in more than 50 percent of the problem cases Results, which in turn have a negative impact on therapeutic measures.

For the diagnosis of an existing form of amblyopia, the are currently on Devices on the market are totally incapable.

This differential diagnosis is critically important to the need and determine the duration of a therapy.

Due to the lack of possibilities for differential diagnosis of the Forms of amblyopia today are completely unnecessarily facial for many children occluded, d. H. the good eye is taped shut for a long time without any there is a prospect of an increase in visual acuity in the poorer eye. This can we avoid with an exact diagnosis.

It is particularly crucial for expert questions Meaning How To Be Seen Under Real Natural Binocular Condition And Which One Visual performance is either monocular or binocular.

Task: The invention is based on the following tasks: 1. Binocular functions to be proven precisely and in a manner that can be standardized.

2. Carry out an accurate classification of the forms of amblyopia.

3. Carry out a precise diagnosis of paresis with and without fusion conditions.

4. Determination of the fusion area in patients with strabismus, the dosage a squint operation.

Solution of the task: The solution of the above-mentioned task is alone possible with our device.

1. Compensation of all occurring eye deviations in convergence, difference, Height and cyclorotation.

2. Reproducibility of the fusion movements through motorized synchronism.

3. Using selected stereo images with high fusion intensity we prevent the alternating suppression that otherwise occurs and thereby simulate it the ratios of free space in the distance and prevent thereby false negative results.

4. The detection of unilateral and bilateral microstrabismus is new with and without adjustment movement, as well as fixation, accommodation and scotoma amblyopia by means of the following technical solution: 4.1. Raster visual inspection and multi-optotype inspection 4.2. Binocular vision 4.3. Two-eyed Haidinger tufts 5. Paresis diagnosis and Squint angle diagnosis with selectable fusion intensity Achievable advantages: The With the invention achieved advantages are that instead of a variety of different devices for the different areas of application, just one Device can be used. This device is also of accuracy and reproducibility far superior to previous devices.

Since group lessons can be carried out, there is the possibility of personnel savings.

Device description: The device essentially consists of 3 components and 4 additional parts.

1. A remote control 2. From a motorized part 3. From 7 two projectors with built-in polarization filter 4. Haidinger Büschel additional device 5. Special projection surface 6. Special slide set 7. Special forehead projection light The motor part of the device is able to move both projectors in the three room levels. The separation the images for the right and left eye are made using built-in polarization filters. All functions can be called up on the control panel. They are: convergence, divergence, Cyclorotation, flip-flop switching, image transport, cross-fading, Haidinger tufts.

In front of one of the two projectors there is a motorized rotating one Polarization filter for generating the Haidinger tuft, is located on the other projector a varifocal lens for changing the image size.

A standard aluminum sheet (Al gm 3) is used for projection. The marks for paresis diagnosis can be attached to this # projection surface will.

A special slide set is used to solve the above tasks used. The following configuration is new: 1. Real stereo images 2. Binocular visual images 3. Test images for diagnosing fixation and accommodation amblyopias 4. Test images for paresis diagnosis 5. Training pictures with different fusion intensities With With the help of a special headlamp it is ensured that the paresis examination brings fully reproducible results.

The device includes a set of polarized glasses that are 45 degrees and 135 degrees are polarized, and partly for shield diagnostics with a lighting device are provided.

Claims (4)

Claim: 1. Examination device for recording all forms of Amblyopia, for the quantification and training of binocular vision and for paresis diagnosis, because of its motor synchronization and its special motor Control alone enables the necessary standardization and reproducibility. 2. First sub-claim Special slide set Characteristic parts are: 2.1. Real stereo images 2.2. Revised stereo images for binocular vision testing 2. 3. Raster visual images and multi-optotype images 2.4. Paresis diagnosis with selectable Degree of dissociation 2.5. Training pictures with selectable different fusion intensities 3. Second sub-claim: Large projection area with a metallic surface, to simulate the natural conditions of free space. 4. Third subclaim: polarization glasses with side lighting and or headlamp. 1. As normal glasses 2. As a connector for glasses worn by the ciqcrlLtI