Cognitive behavioural therapy (CBT) has been proven to be effective in helping people with distressing psychotic symptoms such as auditory hallucinations or upsetting delusional beliefs. While the majority of hallucinations reported in psychotic disorders are auditory, visual hallucinations (VH) have been reported in 16%-72% of people with psychotic disorders like schizophrenia and schizoaffective disorder. VH appear to be associated with particularly high levels of distress, and impairment. The global severity of illness was significantly higher in people with schizophrenia and VH, as compared to those people without VH. Whilst antipsychotic medication is the first line of treatment for psychotic symptoms like VH, there is evidence that many service users choose to refuse or discontinue their pharmacological treatment. For example, the largest trial to compare atypical antipsychotics found that 74% of patients with a diagnosis of schizophrenia discontinued their medication over 18 months. Hence, there is a need to develop a range of effective treatments. Despite its value in treating auditory hallucinations, at present there is no specific CBT treatment for VH.