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Telefon Dehag

0551 / 32519

Telefon Dehag

0551 / 376106

Nystagmus Spectacle Type 522

ble_522aby Dr. Blessing  


Nystagmus Spectacle with:

  • hinged lenses
  • fixed connection wire
  • fixed headband



Nystagmus Spectacle with hinged lenses by Dr. Blessingble_522c

Modern vestibular diagnostics require a high degree of precision when looking for spontaneous or provoked nystagmus. In many cases, the only way of making a correct diagnosis was to perform a technically complex electronystagmography (ENG). The new nystagmus glasses by De. Blessing represent a user-friendly alternative. With these new goggles, nystagmus intensity and amplitude achieve 80% – 99% of ENG values. Dr. Blessing’s new Nystagmus Goggles are illuminated indirectly so as to not trigger light reflexes that could have the undesired, nystagmus-inhibiting effect of visual fixation in the patient. As shielding of the light bulbs means that light does not fall directly onto the patient’s eyes, no PURKINJE vein image occurs, the movement of which could trigger arbitrary “illuminated goggles nystagmus”. As such, we avoid false positive nystagmus results. The actual examination using these goggles takes place in a dark or a heavily dimmed room. The illumination of the inside of the goggles causes the patient to lose visual contact with his/her surroundings (preventing nystagmus-inhibiting visual fixation). At the same time, it is especially easy to observe the patient’s brightly illuminated eyes using magnifying lenses. This means it is often possible to detect immediately, just by looking at the patient, pathological nystagmus processes that would be impossible or difficult to detect, even when looking sideways.

Nystagmus Spectacle Type 522ble_522b

With the lenses turned up and the room illumination switched on, eye observation with maintained fixation is possible: e.g. the Hallpike-technique of termal examination. After switching off room illumination and hinging down the lenses, an immediate change-over into the actual luminous spectacle examination with elimination of fixation may be started.      




Power Supply Type 506netzteil_beide

Power supply of the nystagmus spectacle.  





DEHAG-Battery Container Type 504batteriegriff_neu_beide

In order to allow a usage independent of the power supply, alternatively the Nystagmus Spectacle can be supplied with power through the DEHAG-Battery container. It can be operated with three 1.5 Volt batteries, size C LR14/AM-2 (baby cells). (Batteries are not subject of the offer).




Replacement cover Type 57.20.02ble_abdeckung

The cover ensures the shielding of the light bulb and guarantee an indirect illumination of the Nystagmus Spectacle.        





Replacement lamp Type 507fre_elampe

The Nystagmus Spectacle Type 522 can be operated with a 4 Volt; 0.23 Ampere; 1 Watt replacement lamp. (Thread diameter: 3.5 x 0.35mm). download: prospectus Nystagmus Spectacles by Dr. Blessing (PDF file 1,4 MB)