Dementia and sensory loss: Sight loss

How common is sight loss?

The older you are, the more likely you are to live with sight loss. Around one in nine people over the age of 60 are living with sight loss – and by the age of 85 this has increased to around one in three people (Access Economics, 2009).

Among everyone over the age of 65, normal ageing of the eye will, to some extent, reduce their vision. Health conditions that lead to sight loss are largely age-related. Almost everyone aged over 80 will have (or have had) a cataract. As the population ages, an increasing number of people will experience both dementia and sight loss. At least 123,000 people in the UK have both dementia and serious sight loss (RNIB 2012). Most are over the age of 65.

Sight loss among people with dementia may be caused by:

Sight loss and dementia: Advice for care staff

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The impact of sight loss and dementia

When a person has dementia and sight loss, many routine things – such as getting out and about, communicating and day-to-day living – become more difficult than if the person only had one of these conditions.

Dementia combined with sight loss can lead to:

  • profound disorientation and isolation
  • an increased risk of falls
  • difficulties moving between light and dark spaces
  • difficulties learning to use new equipment
  • less independence
  • misperception and misidentification of people, articles and activities
  • anxiety and worry for carers and relatives.

Sight loss and dementia: Jim’s story

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For more on this, see Lawrence et al (2008).

Making the most of someone’s sight, ensuring that communication is effective and taking steps to adapt the environment and support orientation – these are all vital ways to help support the independence, confidence and wellbeing of a person with dementia.

Visual misinterpretations and hallucinations

A common problem for people with dementia is misinterpreting visually what they are seeing. For example, they may see a face in a patterned curtain, or see a shadow on the floor, but interpret it as a hole in the ground. Simple adjustments to lighting or décor may be able to stop this from occurring.

Sight loss can increase the risk of someone with dementia experiencing hallucinations. It is important however to understand that people with sight loss can experience visual hallucinations (that is, they see things are aren’t really there) – commonly called Charles Bonnet syndrome (CBS). This is a common condition among people who have lost their sight. It can be distressing, but the hallucinations are usually not permanent. Many people experience hallucinations for a year to 18 months before they become a lot less frequent. It would therefore be important to know when supporting someone with sight loss and dementia whether they had experienced sight loss-related hallucinations in the past.

When I got a dementia diagnosis people knew I was having problems, so were quite understanding and looked at how they could help. Not so with this sight problem. Other people can’t see anything wrong... [RNIB] offered suggestions and little ways of stopping falling. I started to cry, just with relief that I’d got help for the first time.

Agnes Houston, talking at a seminar on dementia and sight loss (see Dementia and Sight Loss Interest Group, 2009)

People with certain types of dementia, such as dementia with Lewy bodies, Parkinson’s disease dementia and Alzheimer’s disease may also experience hallucinations caused by the dementia, but still have healthy eyes. So having a sight test can help to rule this out.

The Alzheimer’s Society has produced a factsheet on this topic, called Sight, perception and hallucinations in dementia.

Improving verbal communication

When speaking with someone with sight loss and dementia, there are many things that we can do to help the communication – and avoid frustration and confusion.
Consider the following suggestions:

Remember that many people with sight loss will not pick up on non-verbal communication, for example your facial expressions will be lost to them or they might not be able to follow when you are making a joke.

Improving written information

Written information can pose problems for people who cannot read standard print. Quite often, the solution involves reading everything out to the person, but this can be embarrassing and frustrating and, with confidential information, not always appropriate.

You need to know how each individual prefers to read written information and record this on their care plan and patient record. They might prefer large or clear print, audio CD or Braille.

Some basic suggestions include:

For more information, a good resource on this is Seeing it from their side: A guide to recognising and supporting sight loss in your care home.

Seeing it from their side…

Look at the pictures below. Try to imagine interpreting the world while having dementia and one of the following eye conditions:

Make the most of existing sight

Wearing the wrong spectacles is a recipe for confusion, mistakes, slips and trips. Many older people have different pairs of glasses for reading or eating, watching TV or walking around. It is easy not to remember which pair of glasses is for which task. Some suggestions for making it easier include the following:

Regular eye tests

Even if a person’s vision seems OK, an eye test can detect problems they don’t know they have – and save their sight. The RNIB recommends that people over 70 should have a full eye examination every year. Sight tests are free to those over 60. In Scotland people over 60 are seen annually.

An eye test will assess short and long sight and check eye health. It will identify eye conditions that may cause sight loss without early treatment. Eye examinations are especially important for people with dementia as the symptoms of dementia may mask the symptoms of sight loss, and so may mean that steps to improve sight, independence, wellbeing and cognitive function are missed.

Here is a simple checklist for sight loss. Does the person find it difficult to:

If two or more of these apply, an eye examination should be arranged. Even if someone over 70 has none of these issues, they should still have an eye test once a year.

Eye examinations at home

If the person with dementia cannot get to the opticians due to difficulties leaving the house, they are entitled to an eye examination at home. Not all optometrists will do home visits but the person’s GP or your local clinical commissioning group should be able to tell you which local optometrists provide eye examinations at home. People who are 60 or over qualify for a free NHS eye examination and will not have to pay anything for an eye test at home.

Some people also qualify for support with the cost of glasses. For more information call the RNIB helpline on 0303 123 9999.

Cataracts and dementia

One condition a sight examination may identify is cataracts. Cataracts are a very common eye condition in older people. Most people with cataracts are over the age of 60 and they become more common as people age. Having dementia does not preclude someone from eye surgery and in fact there may be benefits for someone with dementia having a cataract identified and treated early.

The Dementia and Sight Loss Interest Group (see below for more information on this group) has developed a factsheet that explains:

Low vision services

Low vision services can help people make the most of their remaining sight. Specialist optometrists are able to assess someone’s vision and provide them with a magnifier. They can also give advice on lighting and reading techniques. Most low vision services are based in hospitals and someone will have to be referred to them through their ophthalmologist or GP. If a person is unable to get to the hospital, a low vision assessment should be made available at home.

When a person is registered as sight impaired or severely sight impaired, they should be offered an assessment by their local social services. Even if the person is not registered but has poor sight, it should still be possible for them to have an assessment by their local social services.

Vision rehabilitation services can also make a real difference to someone with poor sight. These services are mostly offered through local social services, and some may be provided by a voluntary organisation. A vision rehabilitation officer gives advice on using a symbol or mobility cane and staying safe by adapting a person's environment, and help to stay confident when getting out and about.

Most people with sight problems use both their low vision service and their rehabilitation service. In some parts of the country these services may be integrated. The RNIB or your local society for people with poor sight should be able to let you know the arrangements for your area.

Adapt the environment

Make the environment work to make the most of everyone’s sight. Consider these tips below:

To summarise this even more simply, remember these three principles:

Or think about it this way: is it easier to find dark chocolate in a brown box or a white box? Is it easier to find white towels or blue towels in an all-white bathroom?

To find out more, go to this factsheet from RNIB Scotland and the Scottish Government: Environmental tips to help a person with dementia and sight loss and the RNIB and Thomas Pocklington Trust resource (2013) Lighting solutions guide: improve the lighting in your home. The section on Dementia-friendly environments also has lots of relevant content.

Equipment and technology

There are many specialist gadgets available to support everyday living, for example: large and clear faced clocks and watches, talking clocks and watches, easy-to-use remote controls for TVs, big-buttoned phones, landline phones with pictures for speed dials and talking labels to stick onto anything and everything.

Everyday gadgets – such as one-touch can openers or bendy chopping boards – can also be just the thing to make life easier. Good lighting is good for everyone. Lights above working surfaces and bathroom mirrors make everyday tasks easier and safer. Reading lamps can make the difference between reading the paper and losing touch with the world.

Specialist services for people with sight loss can also be beneficial for people with dementia:

To find out more about each of these services, start with the RNIB website, and the information on living with sight loss.

To find out more about specialist products, start with the RNIB’s shop.

Accessible activities

People with sight loss and dementia can often feel isolated because they can be excluded from everyday activities. It is important that activities are made accessible.

This may involve just thinking about the needs of a person with sight loss and dementia and doing some practical things to help, such as remembering to explain what you are going to do, or remembering that the person can’t read the noticeboard to know what is going on and coming up with an alternative way of communicating these notices. Or it may mean buying in things such as talking newspapers and other items described above.

Finding out how someone’s previous interests can still be supported and made accessible is also important and the RNIB, Action for Blind People and local sight loss charities can offer support with this. Sight loss with dementia increases anxiety about risks – but it is important to work out how to make much-loved activities accessible rather than ruling them out.

Gardening, for example, is an enjoyable hobby for many people with sight loss and dementia and sight loss need not stop someone from undertaking this. There are a number of custom-made gardening tools, techniques and methods that can make gardening easier. Thrive, the gardening organisation for people with disabilities, can offer support and advice for people who wish to garden.

The way in which support is offered to people with sight loss is so important too. Support activities that have clear scent, sound, touch or movement, for example baking, gardening or hand massage. In unfamiliar places, find or create audio descriptions. And wherever you are, describe what is going on and who is involved.

In the example below, Hilary Dyce explains how she has tried different things to support her mother (who has Alzheimer’s disease and an eye condition) to continue to do activities she enjoys.

‘I’d like to…tell you about some of the things we have been doing to compensate for Mum’s difficulties – things that do not require her to "see":

Support with orientation

‘Guiding’ refers to how support is offered to a person with sight loss to help them move around, indoors or outdoors. Here are some tips:

To find out more and watch useful videos on guiding people with sight loss, go to the RNIB’s website.

About the Dementia and Sight Loss Interest Group

The Vision 2020 UK Dementia and Sight Loss Interest Group was set up in 2008 in response to the growing realisation that, although large numbers of people with dementia also have problems with vision and visual perception, awareness of the particular difficulties faced by those affected by both conditions is very low. The group consists of the Alzheimer’s Society, the RNIB, the Thomas Pocklington Trust, the Macular Society, Guide Dogs and the Royal College of Ophthalmology.

The group’s aims are to:

To date, the group has developed a range of resources including:

The group supports a significant amount of research as well.


All SCIE resources are free to download, however to access the following downloads you will need a free MySCIE account:

Available downloads:

  • Activity: Sight loss and dementia
  • What the research says: Sensory loss