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Non-physiological visual loss is a visual abnormality not associated with a structural (refractive) change or an organic disease process. It may be due to:
? Malingering. In this condition the patient claims visual disability but does not actually experience the symptoms. The claim is usually made for financial or other gain
? Functional change. A subconscious (not wilful) change, where the patient actually experiences the symptoms. This condition is most often seen as a paediatric functional bilateral amblyopia. Such patients often have multiple symptoms, as well as a reduced academic achievement. It is linked to visual or emotional stress and the prognosis is usually good. The condition is not associated with a hysterical personality.
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