what are infrared video goggles
WHAT ARE INFRARED VIDEO GOGGLES?
Infrared video goggles, sometimes referred to as “video frenzel goggles”, have been used in research and clinical practices since the 1970’s to make examination of a dizzy vestibular patient more effective by allowing a clinician to see eye movements that are often suppressed in room light. The patient wearing the goggles only sees darkness. This is also clinically known as visual fixation removed since the patient cannot see any object upon which they could fix their gaze. At the same time, the infrared cameras inside the goggles (one in front of each eye) allow the clinician to view the patient’s eyes via a computer or laptop screen.
Visualizing Eye Movements
The primary use of infrared video goggles is to see a close-up image of the patient’s eye. While using infrared video goggles, you may see brisker and/or a greater variety in types of eye movements than you are used to seeing if your prior vestibular exams have been done in room light.
Refer to your vestibular education resources from prior education/courses and use mentorship, including online resources such as social media groups of experienced vestibular therapists if in-person mentorship is less available to you, to continually get feedback and refine your skill at interpreting various eye movements.
Vestibular Technologies Comparison
|Insight Infrared Video Goggles||Other Infrared Goggles||Frenzel Goggles|
|Equipment and Training Requirements||
|Portability||Small, light, and portable - can move between treatment rooms, hospital rooms or ER, doctor’s office exam rooms, or in and out of patients’ homes as needed||Most not easily portable - stationary single room setup for an outpatient clinic; not designed for use in hospital rooms, ER, or patient’s homes||Small and portable with battery use; room must be dark for use, limiting utility in certain settings e.g. ER unless in private room|
|Camera Features||Dual cameras come standard and allows for viewing of one or both eyes per viewer preference||Single and dual camera systems are available; dual cameras are newer and more expensive||Thickened lenses utilized instead of camera for viewing, so visual fixation not fully removed|
The articles listed below demonstrate how infrared video goggles and related technologies have been used in the diagnosis and treatment of vestibular disorders.
- Baba S, Fukumoto A, Aoyagi M, Koizumi Y, Ikezono T, Yagi T. (2004). A Comparative Study on the Observation of Spontaneous Nystagmus with Frenzel Glasses and an Infrared CCD Camera. Journal of Nippon Medical School. 71 (1): 25-29. Full text: https://www.jstage.jst.go.jp/article/jnms/71/1/71_1_25/_pdf/-char/en
- Gananca M, Caovilla H, Gananca F. (2010). Electronystagmography versus videonystagmography. Brazilian Journal of Otorhinolaryngology (Impr.). 76 (3): 399-403. Full text: http://www.scielo.br/pdf/bjorl/v76n3/en_v76n3a21.pdf or http://www.scielo.br/scielo.php?pid=s1808-86942010000300021&script=sci_arttext&tlng=en
- Hain T. “Frenzel goggles.” Dizziness and Balance. Chicago Hearing and Balance, 3 August 2016. Web. Accessed 12 April 2018.
- Huh YE, Kim JS. (2013). Bedside evaluation of dizzy patients. Journal of Clinical Neurology. 9 (4): 203-213. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3840130/
- Kattah JC, Talkad AV, Wang DZ, Hsieh YH, Newman-Toker DE. (2009). HINTS to diagnose stroke in the acute vestibular syndrome: three-step bedside oculomotor examination more sensitive than early MRI diffusion-weighted imaging. Stroke. 40(11): 3504-3510.
- Klaus J, Strupp M, Siegbert K, Schuler O, Glasauer S, Brandt T. (2002). Suppression of eye movements improves balance. Brain. 125 (9): 2005-2011.
- Newman-Toker DE, Curthoys IS, Halmagyi GM. Diagnosing stroke in acute vertigo: the HINTS family of eye movement tests and the future of the “Eye ECG.” Seminars in Neurology. 35 (5): 506-521.
- “Nystagmus.” American Optometric Association. American Optometric Association, 2018. Web. Accessed 12 April 2018.
- Ruckenstein MJ, Shepard N. (2000). Balance function testing: a rational approach. Practical Issues in the Management of the Dizzy and Balance Disorder Patient. 33 (3): 507-517.
- Shepherd N. (2009). Signs and symptoms of central vestibular disorders. American Speech-Language-Hearing Association. https://www.asha.org/Articles/Signs-and-Symptoms-of-Central-Vestibular-Disorders/ Accessed 12 April 2018.
- Stern RM, Hu S, Anderson RB, Leibowitz HW, Koch KL. (1990). The effects of fixation and restricted visual field on vection-induced motion sickness. Aviation Space and Environmental Medicine. 61 (8): 712-715.
- Webb NA, Griffin MJ. (2002). Optokinetic stimuli: motion sickness, visual acuity, and eye movements. Aviation Space and Environmental Medicine. 73 (4): 351-358.