Journal of Otolaryngology and Ophthalmology of Shandong University ›› 2018, Vol. 32 ›› Issue (6): 60-63.doi: 10.6040/j.issn.1673-3770.0.2018.313

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Invention and application of subjective visual vertical and horizontal examination software

ZHANG Yuzhong1, WEI Xinyu1, LI Yingqi2, CHEN Zichen1, XU Yong1,3, CHENG Ying1, GAO Ying1, CHEN Feiyun1, HU Juan1, XU Min1, ZHANG Qing1   

  1. The Second Clinical Medical College of Xian Jiaotong University, Xian 710004, Shaanxi, China;
    3. Department of Otolaryngology, Xian 141 Hospital, Xian 710089, Shaanxi, China
  • Published:2018-11-29

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Abstract: Objective To develop software to examine the subjective visual vertical(SVV)and subjective visual horizontal(SVH). These parameters are mainly used to determine the symmetry and dominant side of bilateral otolith function, evaluate the static compensation state of otolith function, and guide vestibular rehabilitation. Methods The SVV/SVH software was developed and combined with a visual reference barrel device, and used in a dark examination room to collect data from 80 healthy volunteers to determine the normal reference range. This study was a cross-sectional study. Results In the 80 healthy volunteers, the average deviation of the SVV examination ranged from -3.00° to 3.00°. The mean(± standard deviation)was -0.29(±1.42)°. The mean deviation of SVH ranged from -4.00° to 3.50°. The mean value(± standard deviation)was -0.38(±1.84)°. Conclusion The 95% normal reference ranges of the SVV and SVH measured using the software were -3.13 to 2.55° and -4.06 to 3.30°, respectively. The software and equipment can be used to evaluate the functional status of the otolith. Combined with other vestibular examinations, such as vestibular-evoked myogenic potentials, caloric test, and video head impulse test, the software can be used to comprehensively evaluate the patients vestibular function and vestibular compensation status and guide vestibular rehabilitation.

Key words: Subjective visual vertical, Subjective visual horizon, Vestibular otolith, Software design and application

CLC Number: 

  • R764
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