The Effect of Instruction on Outcome Performance in Optokinetic Testing

Thursday, 11:00am to 1:00pm
Seabright
Poster 1
Videonystagmography (VNG) uses a series of non-invasive tests to record and analyze involuntary eye movements (nystagmus) through the use of infrared goggles. VNG assessments assist in differentiating between inner ear pathologies and a more central site of lesion. The purpose of this study was to determine if a gold standard of instruction should be developed and incorporated into the clinical setting for the optokinetic (OPK) portion of the VNG test battery. The OPK portion of the VNG test battery was administered to 30 young adults with normal hearing and no prior history of vestibular problems or previous exposure to the VNG assessment process. Participants were separated into three groups of 10. Each group was given a specific instruction and was labeled according to the instruction provided: Group A (watch group), Group B (count group) and Group C (train group). Participants completed the OPK portion of the VNG assessment via the BalanceBack Intuitive VNG system (full-field stimulation) and Micromedical Technologies Visual Eyes system (partial-field stimulation). Stimuli were presented at 20/sec for a duration of 30 seconds in both the right and left direction. A correlation analysis was conducted separately for each instruction group. Correlations were run for each eye, for each eye movement, and for both systems. Results revealed that instruction does not have an effect on outcome performance of OPK assessment. Results indicate that a gold standard of instruction does not need to be implemented in the clinical setting when administering the OPK portion of VNG assessment.
Track: 
Audiology