Effects of surgery for intermittent exotropia on binocular visual evoked potential

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Effects of surgery for intermittent exotropia on binocular visual evoked potential

 

Author: Kwok, Shing-chin
Title: Effects of surgery for intermittent exotropia on binocular visual evoked potential
Degree: M.Sc.
Year: 2007
Subject: Hong Kong Polytechnic University -- Dissertations.
Binocular vision disorders -- Surgery.
Eye -- Diseases -- Diagnosis.
Department: Dept. of Health Technology and Informatics
Pages: xiii, 51 leaves : ill. (some col.) ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2174122
URI: http://theses.lib.polyu.edu.hk/handle/200/2345
Abstract: This study was conducted in a clinical setting of a regional hospital. This research aimed to assess the effect of surgery on binocular visual evoked potential (VEP) amplitude with intermittent exotropia and to correlate electrophysiological and clinical data on binocular function following surgical intervention. Five pediatrics patients were recruited for the study. Clinical binocular and electrophysiological binocular visual evoked potential test were measured before and after surgery. Data was analyzed with paired T-test to evaluate the changes of values on clinical binocular test and amplitudes of P100 pre and post operatively. Significance was concluded with p<0.05 criterion. Pearson correlation statistical method is used to correlation the electrophysiological and clinical data on binocular function following surgical intervention. Results showed the VEP electrophysiological test did not demonstrated a statistically significant increase in both monocular and binocular groups. No significant correlation was found between the changes of binocular VEP to the changes of clinical Randot binocular test. A linear relationship between was found between changes of binocular VEP to the changes of both distance base out and base in fusion range which was collided with the successful surgery cases. This pilot study shows a potential correlation between successful surgeries to the increase of binocular VEP and improvement of distance fusion range postoperatively.

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