Visual conversion reaction is characterized by fluctuating visual acuity and tubular fields in the absence of any organic lesion. It is thought that the environmental and psychological factors contribute to the onset of symptom. Twenty-two cases of visual conversion reactions were evaluated clinically and the results were as follows. 1. Visual conversion reaction is more frequent in females and children and low vision is almost always affected bilaterally. 2. Sixteen cases(72.7%) showed tubular and constricted fields inspite of normal CT and electrophysiologic responses. 3. Of the cases, 86.4%(19/22) had improved their reduced visual acuity to over 0.8 after treatment with suggestion, placebo, plano lenses and some kind of psychotheraphy.
Child ; Conversion Disorder* ; Female ; Humans ; Psychology ; Vision, Low ; Visual Acuity

OBJECTIVE: To study the application value of contrast vision in identifying the malingering decreased vision in the practice of clinical forensic medicine. METHODS: Thirty-one young and middle aged volunteers were selected and divided randomly into group 1 (16 persons with 32 eyes) and group 2 (15 persons with 30 eyes). The optotype contrast was 100%, 25%, 10% and 5%, respectively. The contrast vision of group 1 was tested. The contrast vision of group 2 was tested as follows: (1) the volunteers cooperated without inspector's interference; (2) the volunteers cooperated under inspector's interference; (3) the volunteers disguised decreased vision without inspector's interference; (4) the volunteers disguised decreased vision under inspector's interference. The data was then analyzed by statistics. RESULTS: There was a close correlation between contrast vision and contrast. As the contrast decreased, the vision acuity also decreased. The contrast vision curve of former two methods showed a good reproducibility while the contrast vision curve of latter two methods had a bad reproducibility. CONCLUSION The repetition of contrast curve with or without inspector's interference can be used to discriminate malingering vision. The acquired contrast curves can be provided to the court as direct evidence and can help enhance the verification conclusion.
Adult ; Contrast Sensitivity/physiology* ; Diagnosis, Differential ; Female ; Humans ; Male ; Malingering/psychology* ; Reproducibility of Results ; Sensitivity and Specificity ; Severity of Illness Index ; Vision Tests/statistics & numerical data* ; Vision, Binocular ; Vision, Low/psychology* ; Visual Acuity ; Young Adult