How Dementia Affects Vision and Perception – With David Knight, Advanced Clinical Practitioner & Prescribing Optometrist

Episode Summary

In this insightful conversation, Juliah is joined by David Knight, Advanced Clinical Practitioner and Independent Prescribing Optometrist, UK, to explore how vision and perception are affected by dementia. Using real-life examples and clinical experience, David breaks down how the brain and eyes work together—and how dementia disrupts this connection. From the differences across dementia types to practical home adjustments, this episode helps caregivers and professionals better understand visual challenges in dementia and how to address them.

 

4 Key Topics Discussed:

How dementia affects visual processing – explained through the case of Jennifer and the wristwatch vs. clock scenario.

 

Differences in visual symptoms across dementia types – including Alzheimer’s, Lewy Body, and frontotemporal dementia.

 

The connection between eyesight and cognitive decline – does poor vision contribute to dementia, or vice versa?

 

Vision assessments and accessibility – including tips for clinicians and caregivers on evaluating visual function in individuals with cognitive impairment.

 

4 Key Takeaways:

Vision and the brain are tightly linked—dementia can distort visual interpretation even when the eyes are healthy.

 

Types of dementia affect vision differently—for example, Lewy Body dementia often causes visual hallucinations, while vascular dementia may affect contrast or depth perception.

 

Misinterpreting visual signs can be risky—caregivers might mistake visual dysfunction for stubbornness, which can lead to frustration or accidents.

 

Small home adaptations can make a big difference—like lighting, contrast, and simplifying visual clutter to support safety and independence.

#dementia #vision loss #Lewybodydementia #sensoryperception #dementiacare #optometristinterview #cognitivedecline

 

Resources Mentioned

A New Approach to Dementia: Examining Sensory and perceptual Impairment

 

https://podcasts.apple.com/nz/podcast/designing-for-dementia-how-smart-technology-and/id1710778347?i=1000715402699

 

https://podcasts.apple.com/nz/podcast/honouring-jennifer-josey-1944-2024-a-journey/id1710778347?i=1000686624853

 

Share this episode with a friend, colleague, or family caregiver who may benefit from learning more about sensory changes, visual dysfunction, smart technology, and environmental design in dementia care.

 

If you found this episode helpful, please follow, rate, and review the Dementia Caregivers’ Corner Podcast on your favourite listening platform.