BACKGROUND AND OBJECTIVES: Several manufacturers supply different types of Frenzel glasses, but the quality of these varied Frenzel glasses seems to be quite different. The aim of this study was to compare the competence in suppressing visual fixation (VF) among different types of Frenzel glasses. The second aim was to develop a new type of Frenzel glasses which is cheaper and more convenient to carry, but has an equivalent competence. MATERIALS AND METHODS: Four different types of Frenzel glasses were evaluated: 30 diopter Frenzel glasses manufactured by Nagashima (N), 10 diopter Frenzel glasses manufactured by Jungang (J), 13 diopter conventional magnifying glasses (M) and 17 diopter Fresnel lens glasses assembled by the authors. The amplitude of the spontaneous nystagmus (SN) was measured though the electronystagmography system. The SN was measured 35 times from 15 patients who were diagnosed as vestibular neuritis. RESULTS: The mean amplitude of the SN was 8.8+/-3.2degrees/sec when measured with the videonystagmography goggles. When the same SN was measured through the 4 different Frenzel glasses, it was 7.5+/-2.8 (N), 6.3+/-3.0 (F), 6.2+/-3.0 (M), and 5.7+/-2.6 (J)degrees/sec respectively. The amplitude of the SN was significantly bigger when wearing the N glasses compared to the other 3 glasses. The SN was significantly smaller when wearing the J glasses compared to the F glasses. CONCLUSION: The competence of suppressing VF was significantly different among the varied types of glasses. The F glasses seem to have a similar or better competence with the J glasses. F glasses seems to be a fairly good alternative which is very portable and cheap.
Electronystagmography ; Eye Protective Devices ; Eyeglasses ; Glass ; Humans ; Mental Competency ; Vestibular Neuronitis

OBJECTIVES: The purpose of this study is to assess the psychometric properties and to investigate factor structure of the Korean version of Fear Survey Schedule for Children (FSSC-K). METHODS: 397 male and 366 female students in elementary, middle, and high school completed the FSSC-K, a anxiety scale, and a self-esteem scale to assess psychometric properties. 403 male and 175 female outpatients completed FSSC-K for confirmatory factor analysis. RESULTS: First, psychometric properties of the FSSC-K compared favorably with that of the FSSC-R. Second, students in elementary school were significantly higher in total score of the FSSC-K than in high school and females significantly higher than males. Third, a seven-factor solution provided the best conceptual fit for responding on the FSSC-K. Fourth, seven-factor model was most appropriate in result of confirmatory factor analysis in clinic-referred sample. CONCLUSION: It is suggested that the FSSC-K have a good reliability and validity and seven-factor model was most appropriate in Korean children and adolescents.
Adolescent ; Anxiety ; Appointments and Schedules* ; Child* ; Female ; Humans ; Male ; Outpatients ; Psychometrics ; Reproducibility of Results

OBJECTIVE: To determine whether the age of the first exposure to substances influences the characteristics of substance abuse. METHOD: Ninety seven adolescent boys in a substance abuse treatment facility were evaluated by using questionnaires, individual diagnostic interviews, and psychology tests. They were classified into 3 groups, preadolescence group(PA), early adolescence group(EA), and middle adolescence group (MA) according to the age of the first exposure to substances, and the data were statistically analyzed by SPSS 9.0. RESULTS: The average age was 16.4+/-1.2 years. There were 39 in PA, 29 in EA, and 29 in MA. In comparison to EA, PA showed higher frequency in substance use, substance dependence, and positive family history of alcohol abuse. In comparison to MA, PA had higher frequency in troubles in interpersonal relationship, functional impairment, dependence on substances, withdrawal symptoms, amount of alcohol and gas consumed, positive family history of alcohol abuse. presence of comorbid psychiatric disorders, and higher score in K-subscale of MMPI. PA also used more variety of substances more frequently, and had shorter duration before starting the second substance. In comparison to MA, EA showed higher frequency of substance use, functional impairment, trouble in interpersonal relationship, diagnoses of substance dependence, and shorter duration before starting the second substance. However, less EA were from disorganized families. Among the 3 groups, there were no statistically meaningful differences in combined use of alcohol, trial of abstinence, duration of abstinence, child abuse history, family support, intelligence, and frequency and duration of running away from home. CONCLUSION: Earlier exposure to substances may lead to more serious problems of drug abuse. Earlier drug prevention education for adolescents should be provided.
Adolescent* ; Alcoholism ; Child ; Child Abuse ; Diagnosis ; Education ; Humans ; Intelligence ; MMPI ; Psychology ; Surveys and Questionnaires ; Running ; Substance Withdrawal Syndrome ; Substance-Related Disorders*

Animals ; Cats ; Diagnostic Tests, Routine ; Hemorrhage ; Humans ; Injury Severity Score ; Mortality ; Odds Ratio ; Resuscitation ; ROC Curve ; Sensitivity and Specificity