Infographic of rare dementia Posterior Cortical Atrophy (PCA), caused by plaques and tangles in the brain


Posterior Cortical Atrophy (PCA), also known as Benson’s syndrome, is a progressive degenerative condition which causes damage to brain cells at the back of the brain. This area of the brain processes what we see.

Symptoms can include changes in vision including:

  • Difficulty recognising familiar objects and faces
  • Increased sensitivity to bright lights or shiny surfaces
  • Double vision
  • Particular difficulty seeing in fading or low light conditions
  • Difficulty judging depth and speed
  • Stationary objects may appear to move.