What is Posterior Cortical Atrophy (PCA)?
Posterior cortical atrophy (PCA) is a rare form of dementia that primarily affects how the brain processes visual information. While vision itself may remain healthy, the brain has increasing difficulty interpreting what is seen.Learn about other types of rare dementias
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How it may present
People living with Posterior Cortical Atrophy (PCA) often experience:
- Difficulty reading, writing or working with numbers
- Problems judging distance or depth
- Challenges recognising objects or faces
- Increased sensitivity to light or visual clutter
Unlike more common forms of dementia, memory may be less affected in the early stages.
Why it matters
Posterior Cortical Atrophy (PCA) can be confusing and distressing, particularly when eyesight appears “normal” but daily tasks become harder. Understanding PCA helps families and clinicians respond with empathy and adapt environments meaningfully.
FAQ
People living with Posterior Cortical Atrophy (PCA) often experience:
- Difficulty reading, writing or working with numbers
- Problems judging distance or depth
- Challenges recognising objects or faces
- Increased sensitivity to light or visual clutter
Unlike more common forms of dementia, memory may be less affected in the early stages.
Find help
Rare dementias can feel isolating, but support, understanding and community make a difference.
Our goal is to better support people living with rare dementia, carers and the professionals who support them: