macDavis OKN Drum NEW

The OKN Drum, short for Optokinetic Nystagmus Drum, is an innovative device used in the field of ophthalmology and optometry to assess and diagnose optokinetic nystagmus (OKN) in patients. OKN refers to the rhythmic, involuntary movement of the eyes that occurs in response to visual stimuli.

The OKN Drum utilizes a cylindrical design, resembling a drum, with alternating light and dark stripes arranged around its circumference. These stripes activate the visual system and trigger the characteristic eye movements associated with OKN. The motion of the drum stimulates the optokinetic reflex, providing valuable information about the health and functionality of the visual system.

When a patient is exposed to the OKN Drum, their eyes naturally track the moving stripes in an attempt to stabilize their gaze. This response is due to the inherent connection between precise eye movements and visual information processing in the brain. As the stripes continuously move, the eyes involuntarily make quick, repetitive movements, indicating the presence and quality of OKN.

The OKN Drum serves as an effective diagnostic tool for various eye conditions. Ophthalmologists and optometrists use it to evaluate the functionality of the oculomotor system, as well as to detect any abnormalities or impairments. By observing the speed, smoothness, and accuracy of eye movements during OKN Drum testing, eye care professionals can gain insights into a patient's visual processing capabilities and identify any potential issues.

Furthermore, the OKN Drum aids in monitoring the progress of patients undergoing treatments or therapies for vestibular disorders, visual impairments, or traumatic brain injuries. It allows healthcare providers to objectively assess changes in a patient's OKN response over time and adjust treatment plans accordingly. This valuable feedback helps optimize interventions and maximize the chances of successful rehabilitation.

In conclusion, the OKN Drum is a significant advancement in the field of ophthalmology, providing a standardized and efficient method for diagnosing and monitoring optokinetic nystagmus. With its ability to elicit and evaluate the eye's response to visual motion stimuli, this innovative device has proven instrumental in enhancing patient care and promoting visual health.

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macBrush V

The Haidinger Brush in a new dimension

The macBrush V is a high-quality and technically advanced instrument of functional optometry for the generation of the Haidinger Brush.

Background and application:

The Haidinger Brush is an entoptic phenomenon which is generated in the fovea centralis by the macBrush V, regardless of whether the fovea centralis is used in normal vision or not. The Haidinger Tuft is perceived as a small propeller-like rotating structure.

If the Haidinger Brush is produced in case of amblyopia with eccentric fixation, then the small propeller is not located at the position that the person fixates with his amblyopic eye. Through this biofeedback the person sees for himself that he is eccentrically fixating. Using optometric techniques, the fixation location (directional value for strait forward) can be moved into the fovea centralis with the macBrush.

To create a Haidinger Brush in the fovea, a rotating polarized disc is required. When viewed through a cobalt filter, the phenomenon is most easily perceived. Stokes found that the tuft is best perceived when the degree of polarization is at least 60% and that light is cobalt blue.

The macBrush V is used in functional optometry as a testing and training device.

Josef Thiel developed the macBrush V and it is available here on this homepage.

Precision and variability are the main features of the macBrush V

Due to a precise adjustment of the Polaroid disc and the cobalt filter, the new mac Brush V achieves an even clearer visibility of the brush / propeller. Best performance thanks to high-quality acrylic and plastic, precisely milled to the 1/100mm.

Mini bearings provide for finest adjustment of the running speed of the turntable.

Infinitely variable settings for comfortable head and body posture.

The turntable can rotate clockwise or counterclockwise.

The speed is variably adjustable.

Accessories acrylic plates

5 points

5 letters

Visual acuity chart

2 labyrinths

20/40/60mm aperture disc

1 pointer

Extended accessories

11 more discs according to the designs of Katja Schiborr.

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macFlash IV

New flash unit for flashtransfer

New flash device for flash transfer (neurological transmission of light impressions). For use after macBrush application and to improve foveal fixation.

• quick charging time

• fast flash sequence

• Card with 5 flash motive, central and peripheral flashing to build binocular fusion

• sturdy and durable case

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Afterimage technic using the macFlash IV

Uwe Seese, naturopath and functional optometrist wrote a report that shows the afterimage technique with the MacFlash. Here PDF download:

Rotator Mac

The new rotator trainer was professionally designed and processed. It is used for testing and increasing eye-hand coordination, attention to space and perception, dynamic visual acuity and dynamic fusion training.

The complete unit has a high-quality electronic control unit, variable speed (0 - 70 rpm), high-performance motor drive, luxury multi-position tilting device, tripod mounting stroke and stable tripod.

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13 new discs

MAC-O-SCOPE

A newly developed stereoscope

The MAC-O-SCOPE is a stereoscope newly developed by Josef Thiel for performing vision tests and / or vision therapy. The MAC-O-SCOPE is available in the versions "mini" (table) and "maxi" (standing solution).

For the new construction, it was very important for Josef Thiel to produce a stereoscope that can be used free-standing (without a table or wall support). The patient has a much better input when using the MAC-O-SCOPE while standing and with peripheral assimilation options. This is particularly important in a variate of different vision problems.

Advantage

• higher material quality

• better instrument read-out of the Eso-Exo area and the zero line

• rapid change of adjustability to chiroscopic tracing

The MAC-O-SCOPE is used by behavioral optometrists to let their patients draw a Van Orden star and / or a chiroscopic image.

The binocular rivalry, the stereo tests and many other tests can be carried out with the MAC-O-SCOPE. Tests for binokular vision and visual projections are also recorded.

The Van Orden star is carried out to understand the patient and his visual problem better. Other professional groups (physicians and therapists) also use the Mac-o-scope as an important instrument. The MAC-O-SCOPE will only be delivered to professional groups.

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It would be a pleasure for us to individualize your MAC-O-SCOPE. Write us or just give us a call!

Instructions to assemble the Mac-o-scope.

Single-Mirror-Cheiroscope V2 NEW

The Single-Mirror-Cheiroscope V2 is another instrument in the field of vision therapy. It is very popular to give it to the patient as a home training device to achieve better flexibility of fusion.

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