Posterior Cortical Atrophy (PCA) is the degeneration of the cells at the back or posterior of the brain.
The changes in the brain resemble those in someone with Alzheimer’s disease but the effects are very different. People with PCA will often first experience problems with their sight. This is because their brain is having trouble interpreting the information sent to it by the eyes. People may also struggle with spelling, writing or maths.
Watch - Do you see what I see? - a short film about PCA below.