["I can't complete my payment form anymore" : Visual disorders in posterior cortical atrophy].

Visual problems occur frequently in elderly patients and are often caused by ophthalmological problems. In this clinical lesson we show that visual problems can also be caused by posterior cortical atrophy (PCA). PCA is a clinico-radiological syndrome that is often caused by Alzheimer's disease and other neurodegenerative diseases as Lewy body dementia and corticobasal degeneration. It is characterized by progressive decline in visual information processing. In addition, there is relative retention of memory and language in early stages. Brain imaging shows atrophy of the posterior brain areas.