Journal of Clinical Otolaryngology Head and Neck Surgery
The Busan, Ulsan, Gyeoungnam Branch of Korean Society of Otolaryngology-Head and Neck Surgery
원저

정상인에 있어서 Visual Suppression Test

김백순1, 구수권1, 방의경1, 고의경1, 전경명1
Back-Soon Kim1, Ku-Soo Guen1, Eui-Kyung Bang1, Eui-Kyung Goh1, Kyong-Myong Chon1
1부산대학교 의과대학 이비인후과학교실
1Department of Otolaryngology, College of Medicine, Pusan National University

© Copyright 1991 The Busan, Ulsan, Gyeoungnam Branch of Korean Society of Otolaryngology-Head and Neck Surgery. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published Online: May 31, 2020

ABSTRACT

It was well known that nystagmus from vestibular origin is easily suppressed by fixing the eye to one point and is termed as visual suppression. In examination of provoked nystagmus, for example rotatory or caloric test, to avoid this visual suppression, we can use Frenzei’s glasses, prism or can examine the patient in dark field.

But recently, many researchers have found that the degree of visual suppression during the caloric test is good parameter for differentiating between peripheral and central lesion.

Authors has investigated the degree of visual suppression in 30 normal subjects(male 18. female 12) while caloric test as guideline in determining between peripheral and central lesions.

To obtain the degree of visual suppression (%), authors has adopted the same method which was proposed by Takemori and Cohen in 1974.

The results obtained were as follows.

  1. There were no difference between either sex statistically.

  2. In visual suppression during cold irrigation(30°C), left VS-I was 65.76± 10.30%,left VS-II was 51.35±9.699% left VS-III was 58.56±9.42% and right VS-I, VS-II,VS-III were 66.36± 12.11%, 52.10± 10.83%, 59.18±10.52% respectively.

  3. In visual suppression during hot irrigation(44°C), left VS-I was 66.53± 10.07%, VS-II was 52.90±8.82%,VS-III was 59.71±8.7% and right VS-I,VS-II, VS-III were 66.50±7.59%, 51.44土 10.90%, 58·97±8·55% respectively.

  4. There were no differences in respect to age.