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PCA visual symptoms and reading difficulties

Key points

  • PCA affects the back of the brain (parietal and occipital lobes), which processes visual information. The eyes themselves are usually healthy.
  • Reading difficulties are common: words may appear to move, change color, or disappear. This is a brain processing issue, not a vision problem.
  • Switch to audio books, text-to-speech, and large-print materials. Use high-contrast, uncluttered environments.
  • Never assume the person is not trying. Validate their frustration and offer practical support without judgment.
  • Watch for hidden symptoms—many people with PCA hide their struggles out of embarrassment. Proactively offer help.
  • Work with a neurologist and occupational therapist to tailor strategies to the person's specific visual deficits.

General caregiving information, not medical advice. Check medications and major care changes with your clinician.

Step-by-step

  1. 1. Start by acknowledging the frustration. Say something like, 'I can see this is really hard for you. It's not your fault—your brain is having trouble making sense of what your eyes see. Let's find a way that works better.' This validates their experience and reduces shame.

  2. 2. Switch from printed text to audio books or text-to-speech tools. Many people with PCA find that listening to a book is far easier than reading. Use apps like Audible, Libby (free library audiobooks), or the built-in text-to-speech on a phone or tablet. If they want to follow along, choose a format that highlights words as they are spoken.

  3. 3. Adjust the visual environment for reading. Use a single, bright, non-glare lamp directed at the page. Avoid fluorescent overhead lights. Use a large-print book or increase font size on a tablet to at least 18–24 points. Reduce clutter on the page—use a piece of colored paper or a reading guide to block out surrounding text.

  4. 4. Simplify the page layout. If using a book, try covering most of the page with a blank sheet of paper, revealing only one line at a time. This helps the brain focus on one small piece of visual information. You can also use a highlighter tape to mark the line being read.

  5. 5. Use high-contrast materials. Black text on a white background is often easiest. Avoid glossy paper, which creates glare. Some people find that yellow or blue tinted overlays reduce visual stress—experiment to see what works.

  6. 6. Encourage the person to use their other senses. Describe what you see: 'I see a big red bird in that tree.' If they are trying to find something, say 'The salt shaker is to the left of the pepper grinder, about six inches away.' Use touch—let them feel the texture of a page or the shape of an object.

  7. 7. Create a consistent, uncluttered space for reading and other activities. Keep the table clear of extra items. Use a solid-colored tablecloth (no patterns). Place only one or two objects at a time in their field of view. This reduces the brain's processing load.

  8. 8. If the person is still able to write, use bold, black felt-tip pens on unlined white paper. Write one word or short phrase per line. Avoid cursive—print in large capital letters. If writing becomes too difficult, switch to typing on a tablet with a large keyboard or use voice-to-text.

  9. 9. For daily tasks like telling time, use a digital clock with large numbers. For money, use a wallet with separate compartments for different denominations. For recipes, use picture-based instructions or a single-step list. Simplify any visual information into its smallest possible pieces.

  10. 10. Keep a log of what works and what doesn't. Note the time of day, lighting, and the specific task. Share this with the neurologist or occupational therapist—they may have additional strategies tailored to your loved one's specific visual deficits.

What not to do

  • Do NOT assume the person is 'not trying hard enough' or being lazy. The visual processing difficulty is real and neurological—it is not a lack of effort. Pushing them to 'just focus' will only increase frustration and anxiety. Instead, acknowledge the difficulty and offer a different approach.

  • Do NOT use complex or patterned backgrounds for reading or conversation. Busy wallpaper, patterned tablecloths, or cluttered shelves can overwhelm the brain's visual system. Keep backgrounds plain and neutral. If you are speaking, stand in front of a solid-colored wall, not a window or a patterned curtain.

  • Do NOT hand them a book or newspaper and expect them to read it normally. This can be humiliating and distressing. Instead, ask if they would like to listen to an audiobook together, or offer to read aloud to them. Frame it as a shared activity, not a test.

  • Do NOT suddenly move objects or change the environment without warning. Because spatial perception is impaired, a person with PCA may be startled or fall if a chair is moved or a rug is repositioned. Always announce changes: 'I'm going to put your coffee cup on your right side, just in front of your hand.'

  • Do NOT correct their visual misperceptions harshly. If they say 'there is a hole in the closet,' do not say 'no, there isn't.' Instead, say something like, 'I can see how it might look that way. Let me check—no, it's just a shadow from the light.' This validates their experience while gently offering reality.

  • Do NOT rely on the person to tell you when they are struggling. Many people with PCA hide their symptoms out of embarrassment or fear. Watch for signs like squinting, tilting the head, bumping into things, or avoiding reading altogether. Proactively offer support.

Practical tools

  • Audio books and text-to-speech apps

    Use Audible, Libby (free with a library card), or the built-in text-to-speech on an iPhone or Android. For following along, try Kindle's 'Immersion Reading' which highlights words as they are spoken. Say: 'Let's try listening to this book together—I find it so relaxing.'

  • High-contrast reading guide

    Cut a piece of stiff, colored paper (yellow, blue, or black) into a rectangle that covers most of the page, leaving only one line visible. Move it down as the person reads. This reduces visual clutter and helps the brain focus on one line at a time.

  • Large-print and simplified materials

    Request large-print books from the library (18-point font or larger). On a tablet, increase font size to at least 24 points and use a sans-serif font like Arial. For writing, use a bold black felt-tip pen on unlined white paper.

  • Environmental setup checklist

    Use a single, bright, non-glare lamp directed at the task. Remove patterned tablecloths and clutter from surfaces. Use solid-colored plates and cups (avoid white on white). Place a dark placemat under a white plate to create contrast. Keep pathways clear and well-lit.

  • Verbal anchoring phrases

    When giving instructions, use simple, concrete language with one step at a time. For example: 'Please pick up the blue cup that is right in front of your hand.' Avoid 'over there' or 'that thing.' Use touch to guide: 'Let me put your hand on the book.'

  • Daily routine visual aids

    Create a single-page, large-print, high-contrast schedule for the day (e.g., '9:00 Breakfast, 10:00 Walk, 12:00 Lunch'). Use pictures if helpful. Place it on the wall at eye level in a well-lit area. Review it together each morning.

Discuss with your clinician

Ask your neurologist: 'Could a medication adjustment help with visual processing or reduce any visual misperceptions?' (Some medications for Alzheimer's or Lewy body dementia may help, but never change meds without a doctor's guidance.)

Ask your ophthalmologist: 'Can you confirm that my loved one's eyes are healthy, and that the visual problems are due to the brain?' This is important to rule out treatable eye conditions.

Ask your occupational therapist: 'Can you do a home safety assessment to identify fall risks related to visual-spatial problems?' They can recommend grab bars, improved lighting, and removal of tripping hazards.

Ask your neurologist: 'Are there any clinical trials for PCA or visual symptoms in Alzheimer's that my loved one might qualify for?'

Ask your doctor: 'Is it safe for my loved one to use over-the-counter reading glasses or magnifiers?' (In some cases, these can actually make things worse if the brain cannot process the magnified image.)

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