Psychogenic visual disturbance and The stereotests

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  • 心因性視力障害と立体視検査

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  We performed visual acuity (VA) test, visual field test,and pattern reversal visually evoked response (PVER) on the patients suspected of psychogenic visual disturbance. In addtion to these tests, the stereotests were also performed.<BR>  In this study, 30 subjects (2males, 28females) suspected of psychogenic visual disturbance were included. Their ages ranged from 7 to 14 years with a mean of 9.0 years. In the VA test, we first measured the uncorrected VA before the corrected VA was measured by the neutralization method. The visual field was assessed with the quantitative Goldmann kinetic perimeter. PVER was recorded under both transient and steady-state conditions. Stereoacuity was evaluated by the Titmus stereotests and Frisby stereotest. If the test result with the uncorrected VA was poor, the test would be performed with the neutralization method. <BR>  About 70% of the subjects could obtain VA of 1.0 or better with the neutralization method. The results of Goldmann kinetic perimetry indicated that about 60% of the subjects had a normal visual field and 40% had an abnormal visual filed with field constriction or in a spiral pattern.Except one subject with slightly unstable responses, the other 29 subjects had normal transient and steady-state PVERs. As for the stereotest results,about 90% of the subjects showed stereopsis better than 100 seconds.<BR>  Our results suggested that when the objective test such as PVER was not available for the diagnosis of psychogenic visual disturbance,stereotests together with VA and visual filed tests could be an effective diagnostic approach.

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