When someone you love has dementia, it’s easy to assume that every change in behaviour, mood, or communication is due to “the dementia getting worse.” But that’s not always the case.
Very often, the problem is hearing or vision loss on top of dementia. New research is showing that treating hearing and vision problems can improve communication, reduce frustration, and support clearer thinking. In other words, helping the senses work better can make day-to-day life easier and more enjoyable – for both the person living with dementia and their family.
Why Hearing and Vision Matter So Much
1. Hearing Loss Increases Cognitive Effort
When hearing is reduced, the brain has to work much harder just to follow a simple conversation. That extra effort takes away “mental energy” that would otherwise help with memory, attention, and decision-making.
The ACHIEVE study (Aging and Cognitive Health Evaluation in Elders) – a large, randomized clinical trial – found that in older adults at higher risk of cognitive decline, treating hearing loss with hearing aids slowed cognitive decline by almost half over three years.
This doesn’t mean hearing aids cure dementia, but they can make thinking and communication easier, especially in those who are already vulnerable.
2. Vision Problems Can Look Like “Confusion”
When someone can’t see clearly, everyday tasks become harder:
- Faces may be difficult to recognise
- Steps, rugs, or shadows may look like obstacles or holes
- Reading, watching TV, or enjoying hobbies becomes frustrating
This can be misinterpreted as memory loss or “difficult behaviour”, when in reality the person may simply not be seeing things properly. Cataracts, outdated glasses, poor lighting, and glare are all common – and often treatable – issues in older adults.
3. Double Support: Hearing + Vision Together
The SENSE-Cog programme in Europe looked at what happens when people with dementia receive proper support for both hearing and vision. The findings were encouraging: families and researchers reported improvements in:
- Social engagement
- Mood and confidence
- Everyday functioning
- Caregiver stress and burden Alzheimer’s Association
By making it easier to hear and see the world, people could connect more easily with others and feel more secure in their surroundings.
What Families Can Practically Do
You don’t need to overhaul everything at once. Here are simple, concrete steps that can make a real difference:
1. Schedule Regular Checks
- Book hearing tests every 1–2 years, or sooner if you notice changes.
- Arrange eye exams to review prescriptions and check for cataracts or other issues.
2. Support the Devices They Already Have
- Make sure glasses are clean, comfortable, and worn regularly.
- Check hearing aids daily: are they charged, switched on, and working?
- Ask the audiologist or optometrist to show you how to maintain and troubleshoot devices.
3. Improve the Environment
- Increase soft, even lighting in hallways, bathrooms, and bedrooms.
- Reduce background noise (TV, radio) during conversations.
- Use high-contrast colours (for example, a coloured plate on a white table) to help with depth and object recognition.
- Use clear labels or signs on doors (toilet, bedroom) if your loved one finds it hard to navigate.
4. Watch for Sensory “Clues”
Sometimes, small behaviours point to sensory problems:
- Turning the TV up very loud
- Saying “What?” frequently
- Withdrawing from conversations or group activities
- Squinting, leaning closer, or misjudging distances
These may be signs that it’s time for a new hearing or eye assessment.
At Protea Memory Clinic, we view hearing and vision as essential parts of dementia care – not optional extras.
We work with families to:
- Notice when sensory changes may be affecting behaviour
- Guide referrals for hearing and vision assessments
- Suggest simple environmental changes that make life calmer and safer
Sometimes, the biggest improvements don’t come from new medicines, but from helping someone see and hear the world more clearly.
If you’re wondering whether hearing or vision changes might be adding to your loved one’s confusion or distress, we’re here to talk it through and help you decide on next steps.
References
- ACHIEVE Study – Official Study Site
https://www.achievestudy.org/ Achieve Study - Alzheimer’s Association Press Release – Hearing Aids Slow Cognitive Decline in Older Adults (ACHIEVE Trial)
https://aaic.alz.org/releases_2023/hearing-aids-slow-cognitive-decline.asp AAIC 2026 - NIH Research Matters – Hearing Aids Slow Cognitive Decline in People at High Risk
https://www.nih.gov/news-events/nih-research-matters/hearing-aids-slow-cognitive-decline-people-high-risk National Institutes of Health (NIH) - SENSE-Cog Project – Sensory Support in Dementia
https://sense-cog.eu/ Alzheimer’s Association - Hearing Aids May Reduce Cognitive Decline – Harvard Health
https://www.health.harvard.edu/mind-and-mood/hearing-aids-may-reduce-cognitive-decline Harvard Health
