Contrast Visual Evoked Potentials under Pattern Stimulus in Ocular Trauma / 法医学杂志
Journal of Forensic Medicine
; (6): 21-24, 2017.
Article
ي Zh
| WPRIM
| ID: wpr-984901
المكتبة المسؤولة:
WPRO
ABSTRACT
OBJECTIVES@#To study the characteristic of contrast visual evoked potentials (CVEP) in patients with ocular trauma.@*METHODS@#Sixty patients defined as ocular trauma by forensic clinical examination in our center were selected, and split into 0.2-0.3 (Group A), 0.3-0.5 (Group B) and ≥0.5 (Group C) according to the best corrected visual acuity. The variation characteristics of wave amplitude and latency of CVEP under 100%, 25% and 10% contrast were observed and analyzed statistically.@*RESULTS@#(1) Under the same contrast, the wave amplitude of P₁₀₀ decreased with the decrease of stimulus perspective. (2) Under the same stimulus perspective, the wave amplitude of P₁₀₀ decreased with the decrease of contrast (P<0.05). (3) Under the contrast of 100% and 25% with the same stimulus perspective (except 100% 7' perspective stimulus), the difference between group A and group B had no statistical significance (P>0.05). Between group A and group C, group B and group C, the wave amplitude of P₁₀₀ gradually increased with the increase of vision (P<0.05). Under the contrast of 10% with 15' stimulus perspective, the wave amplitude of P₁₀₀ increased with the increase of vision (P<0.05). (4) Under the same contrast with the same stimulation perspective, the latency of P₁₀₀ wave shortened with the increase of vision, while the difference had no statistical significance (P>0.05). Under the same stimulus perspective, the latency of P₁₀₀ wave was prolonged with the decrease of contrast (P>0.05).@*CONCLUSIONS@#CVEP may become one of the possible methods for the evaluation of contrast visual acuity.
Key words
النص الكامل:
1
الفهرس:
WPRIM
الموضوع الرئيسي:
Pattern Recognition, Visual
/
Photic Stimulation
/
Vision, Ocular
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Visual Acuity
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Eye Injuries
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Evoked Potentials, Visual
المحددات:
Humans
اللغة:
Zh
مجلة:
Journal of Forensic Medicine
السنة:
2017
نوع:
Article