Abstract
Background Non-organic vision loss can manifest in various ways, most commonly in the form of
reduced vision and visual field defects. Colour vision disorders in the context of
a conversion disorder have only rarely been reported.
Materials and Methods This review presents the case of a 9-year-old boy with a colour vision disorder as
the isolated symptom of a conversion disorder. The challenging in this case was an
additional somatic comorbidity – a congenital red-green deficiency. Consequently it
was difficult to make a diagnosis and to convince the parents.
Conclusion It is important to rule out organic causes and establish the diagnosis of a conversion
disorder. In these cases, multidisciplinary treatment is crucial for a successful
outcome. The diagnosis may be especially challenging when the patients have both somatic
and psychogenic complaints.
Key words
colour vision disorder - functional visual disorder - conversion syndrome
