When your mother starts describing people, animals, or objects that nobody else can see, the experience is understandably alarming. Visual hallucinations in older adults have a wide range of causes, from treatable infections and medication side effects to vision loss and neurodegenerative conditions like Lewy body dementia or Alzheimer’s disease. The first and most important step is a thorough medical evaluation, because the cause shapes everything that follows, including whether the hallucinations can be reduced or even eliminated entirely.
Hallucinations, Illusions, and Misperceptions Are Not the Same Thing
Before jumping to conclusions, it helps to understand what your mother is actually experiencing. A hallucination is a sensory experience that occurs without any external stimulus. She sees a person standing in the doorway, but there is nothing there at all. An illusion, by contrast, starts with something real but gets distorted. A coat draped over a chair becomes a crouching figure; a shadow on the wall turns into a face. Most clinical frameworks treat these as distinct phenomena: hallucinations involve a perception without an external trigger, while illusions are misinterpretations of something that is actually present.1International Psychogeriatrics. Hallucinations This distinction matters because illusions often respond well to simple environmental changes like better lighting, while true hallucinations usually require a deeper medical workup.
In older adults with cognitive decline, teasing apart hallucinations from illusions or even from confused memories and misunderstandings can be difficult. If your mother has dementia, she might describe something she dreamed as though it happened while awake, or she might misidentify a family member as an intruder. Clinicians experienced with older adults know how to sort through these overlapping presentations, so try to document what she reports as specifically as you can before the appointment.
Charles Bonnet Syndrome and Vision Loss
One of the most common and least recognized causes of visual hallucinations in older people is Charles Bonnet syndrome, which occurs when significant vision loss leads the brain to generate images on its own. People with macular degeneration, glaucoma, cataracts, or other conditions that damage the visual pathway can begin seeing vivid, detailed images of people, animals, patterns, or landscapes that are not there.2PubMed Central. Hallucinations Experienced by Visually Impaired: Charles Bonnet Syndrome The hallmark feature is that the person typically knows these visions are not real. Your mother might say something like “I know there’s no cat on the bed, but I can see it clearly.” That preserved insight, along with the absence of hallucinations in other senses like hearing or touch, is a strong clue pointing toward Charles Bonnet syndrome rather than a psychiatric or neurological condition.3Journal of Visual Impairment & Blindness. The Psychotherapeutic Use of Benign Hallucinations with Persons with Charles Bonnet Syndrome
If impaired vision is the root cause, treating the vision problem can sometimes stop the hallucinations. In a study of older adults with cataracts, cataract surgery led to complete resolution of complex visual hallucinations in some patients.4PubMed. Effect of cataract surgery on cognition, mood, and visual hallucinations in older adults Even when the vision loss itself cannot be reversed, simply knowing the diagnosis brings enormous relief. Many people with Charles Bonnet syndrome are terrified they are “going crazy,” and learning that it is a recognized, well-understood response to vision loss can ease that fear substantially.
Neurodegenerative Diseases
Visual hallucinations are one of the defining features of Lewy body disease, an umbrella term covering both dementia with Lewy bodies and Parkinson’s disease dementia. In Lewy body disease, hallucinations range from minor visual phenomena, like briefly seeing movement in the corner of the eye or sensing someone nearby, to complex, fully formed hallucinations of people or animals. Research has shown that these two types involve different brain processes: minor hallucinations are linked to disrupted connections between early visual brain areas and regions that process what we see, while complex hallucinations involve a wider network, including attention-related circuits.5PubMed Central. Visual hallucinations in Lewy body disease: pathophysiological insights from phenomenology Complex hallucinations in Lewy body disease also tend to be associated with measurable cognitive decline, while minor ones are not.
Alzheimer’s disease can also produce visual hallucinations, especially in later stages. Research comparing Alzheimer’s patients with and without hallucinations has found that those who hallucinate show measurably greater impairment in the brain’s visual processing pathway, and this impairment worsens as the disease progresses.6PubMed. Visual Evoked Potentials as a Biomarker for Visual Hallucination Pathway Integrity in Late-Stage Alzheimer’s Disease So if your mother already has a diagnosis of Alzheimer’s and begins seeing things, it may reflect disease progression rather than a new, separate problem.
In Parkinson’s disease, hallucinations have long been blamed on dopamine-boosting medications, but the relationship turns out to be more complicated. While dopaminergic drugs have been associated with psychosis in Parkinson’s, a clear-cut causal link has not been established. Other brain chemical systems, particularly those involving serotonin, noradrenaline, and acetylcholine, play important roles too.7PubMed. Visual Hallucinations and the Role of Medications in Parkinson’s Disease: Triggers, Pathophysiology, and Management This means that simply reducing Parkinson’s medications is not always the answer and could worsen motor symptoms without stopping the hallucinations.
Delirium, Infections, and Medication Side Effects
Not every case of visual hallucinations in an older parent points to a long-term brain condition. Delirium is an acute state of confusion that comes on suddenly, often within hours or days, and hallucinations are a common feature. The list of things that can trigger delirium in an older person is long: urinary tract infections, pneumonia, dehydration, constipation, pain, surgery, hospitalization, and medication changes are among the most frequent culprits. Urinary tract infections are particularly sneaky in older adults because they often present atypically, without the burning or urgency that younger people experience. Instead, the first sign may be confusion, drowsiness, agitation, or seeing things that are not there.8PubMed Central. Urinary Tract Infection Induced Delirium in Elderly Patients: A Systematic Review
Medications are another major trigger. Older adults often take multiple prescriptions, and many common drugs can cause or contribute to hallucinations. Anticholinergic medications (found in some allergy drugs, bladder medications, and sleep aids), opioid painkillers, benzodiazepines, and certain heart medications are frequent offenders. Sometimes the problem is not a single drug but the combination of several. A thorough medication review by a doctor or pharmacist is one of the most productive early steps when an older person begins hallucinating.
The reason delirium matters so much is that it is often reversible. Treat the infection, correct the dehydration, or remove the offending medication, and the hallucinations may stop entirely. But delirium can also be dangerous if left untreated, so a sudden onset of hallucinations in someone who was recently well should be treated as a medical urgency.
Late-Life Psychiatric Conditions
While less common, psychiatric illness can emerge for the first time in older adults. Schizophrenia that appears after age 60 is classified as very late-onset schizophrenia, and it can look quite different from the illness in younger people. The diagnostic challenge is that the initial presentation, including hallucinations and paranoia, can closely mimic the early signs of neurodegenerative disease. Clinicians typically use brain imaging and laboratory testing to rule out neurodegeneration before making a psychiatric diagnosis.9PubMed Central. Utilization of Neuroimaging Techniques in the Differential Diagnosis of Very Late-Onset Schizophrenia and Neurodegenerative Disorders Severe depression with psychotic features can also produce hallucinations in older adults, as can extreme anxiety. These conditions are treatable, which is another reason a complete evaluation matters.
Hallucinations at the Edges of Sleep
Some hallucinations turn out to have a benign and surprisingly ordinary explanation. Hypnagogic hallucinations happen while falling asleep, and hypnopompic hallucinations happen while waking up. These are vivid, dreamlike experiences that can include seeing figures in the room, hearing voices, or feeling a presence.10Schizophrenia Bulletin. Hallucinations in Older Adults: A Practical Review They are relatively common across all age groups and do not indicate disease. If your mother describes seeing someone in her bedroom only at night while she is drowsy or just waking, this may be what is happening. It is worth mentioning to a doctor, but on its own it is not a sign of dementia or psychosis.
What Is Happening in the Brain
Regardless of the specific disease, visual hallucinations across many conditions share a common thread: something has gone wrong in the brain’s visual processing networks. A review that looked across different diagnoses found that patients susceptible to visual hallucinations consistently showed atrophy or reduced activity in the occipital and parietal regions of the brain, the areas responsible for processing and interpreting visual information.11PubMed Central. On visual hallucinations and cortical networks: a trans-diagnostic review In Lewy body disease specifically, neuroimaging studies have found grey matter loss in areas involved in visual processing and disrupted connections in the brain’s default mode network and attention-related regions.12PubMed Central. Structural and Functional Neuroimaging of Visual Hallucinations in Lewy Body Disease: A Systematic Literature Review
Think of it this way: the brain is constantly constructing what you see, filling in gaps and making predictions based on past experience. When the visual pathway is damaged, whether by eye disease, neurodegeneration, or something else, the brain’s gap-filling machinery can go into overdrive, producing images that feel completely real. This is why your mother is not making it up or trying to get attention. Her brain is genuinely generating these experiences, even if there is nothing external triggering them.
What to Do First
The most important immediate step is to get your mother evaluated by a doctor, ideally one experienced with older adults. Bring as much information as you can: when the hallucinations started, how often they happen, what she sees, whether she recognizes the hallucinations as unreal, what medications she takes, and whether anything else has changed recently such as a fall, new symptoms, or a change in sleep. This information helps the clinician narrow the long list of possible causes.
Before starting any treatment, the clinical priority is figuring out whether the hallucinations are actually causing distress. Not all hallucinations need aggressive treatment. Some people with Charles Bonnet syndrome find their visions mildly annoying but not frightening. Others are terrified. The appropriate response depends on how the hallucinations affect the person’s daily life and emotional well-being. A practical clinical framework suggests that if the person mainly wants to understand why this is happening, education alone may be enough. If they want to cope better, structured psychological support can help. Medication becomes appropriate when hallucinations are distressing and other approaches have not been sufficient.13PubMed Central. Hallucinations in Older Adults: A Practical Review – Section: Management and Treatment Approaches
Environmental and Non-Drug Strategies
Simple changes to the home environment can make a meaningful difference, especially when hallucinations are triggered or worsened by visual clutter, dim lighting, or ambiguous shapes. A case study approach using photo assessment of the living environment found that identifying and removing specific environmental triggers, combined with strategies for coping with hallucinations and support for mood, improved visual hallucinations and helped caregivers understand what was happening.14PubMed Central. Case report: Environmental adjustment for visual hallucinations in dementia with Lewy bodies based on photo assessment of the living environment
Practical environmental changes you can try include:
- Improve lighting: Reduce shadows and dark corners, especially in hallways, bedrooms, and bathrooms. Night lights with warm tones can help during evening and nighttime hours, when hallucinations tend to worsen.
- Reduce visual clutter: Busy patterns on wallpaper, curtains, or upholstery can be misinterpreted by an impaired visual system. Plain, high-contrast surfaces are easier for the brain to process correctly.
- Remove or reposition reflective surfaces: Mirrors and glass-fronted cabinets can produce reflections that trigger misperceptions or hallucinations, especially for someone with dementia.
- Check eyesight regularly: An updated glasses prescription or treatment for a worsening eye condition can reduce the brain’s tendency to fill in gaps with false images.
When your mother is actively experiencing a hallucination, resist the urge to argue or insist that nothing is there. For someone whose brain is generating a vivid, realistic image, being told it is not real can feel dismissive and confusing. A more helpful approach is to acknowledge her experience calmly: “I can see that’s upsetting. I don’t see it myself, but let’s move to another room.” Gentle redirection often works better than confrontation.
Medication Considerations and Risks
When hallucinations are frequent and distressing, and environmental or psychological approaches are not enough, medication may be considered. But prescribing for hallucinations in older adults, especially those with dementia, is genuinely complicated. Antipsychotic medications are the most commonly used pharmacological option, yet they carry significant risks in this population, including increased fall risk, sedation, metabolic changes, and in some cases accelerated cognitive decline.
A large retrospective study of older adults with dementia found that the presence of hallucinations was associated with a higher raw risk of death, but after accounting for the severity of dementia and other health conditions, that association weakened considerably and was no longer statistically significant. Antipsychotic use itself was not independently associated with increased mortality risk in that analysis.15PubMed Central. Hallucinations, antipsychotic use, and mortality in older adults with dementia: retrospective cohort study of two Medicare-linked national health surveys This suggests that while hallucinations may mark more advanced disease, cautious use of antipsychotics is not necessarily the death sentence some families fear. Still, the risks are real, and any medication decision should be made carefully with a clinician who knows your mother’s full medical picture.
For Lewy body dementia and Parkinson’s disease dementia, typical antipsychotics like haloperidol are generally avoided because they can dramatically worsen motor symptoms. Atypical options are preferred in these cases, and the treating neurologist or psychiatrist will have a much narrower menu of choices to work with.
Taking Care of Yourself as the Caregiver
Watching your mother see things that are not there is emotionally exhausting, especially if the hallucinations frighten her or lead to agitation and conflict. Caregivers of people with dementia frequently experience depressive symptoms, and the relationship between caregiving burden and mental health is well documented. Research on informal caregivers of people with dementia has found that factors like the caregiver’s knowledge of the disease, perceived social support, coping strategies, and sense of self-efficacy all influence how heavily the burden weighs.16Nature. A modified transactional model of stress and coping on depressive symptoms among informal caregivers of persons with dementia In plain terms, learning about what your mother is going through, building a support network, and developing practical coping skills all protect your own mental health.
If your mother’s hallucinations are part of a progressive condition like Lewy body dementia or Alzheimer’s, you are likely navigating a long road. Connecting with a local caregiver support group, asking the doctor about respite care options, and being honest with family members about the help you need are all worthwhile steps. Many caregivers feel guilty about needing breaks, but sustained caregiving without rest leads to burnout, which ultimately hurts both you and the person you are caring for.
When Hallucinations Change Suddenly
Even if your mother has a known condition that causes hallucinations, a sudden change in their frequency, intensity, or character should prompt a new medical evaluation. A person with Lewy body dementia who has had occasional mild visions for months but suddenly begins hallucinating constantly and becoming agitated may have developed an infection, may be reacting to a new medication, or may be experiencing delirium layered on top of their existing condition. Delirium in someone who already has dementia is common and easy to miss because the symptoms overlap. The key signal is a rapid change from baseline. If what your mother is experiencing this week looks markedly different from what she was experiencing last month, call her doctor rather than assuming it is just the disease getting worse.
Keeping a simple log can be surprisingly useful. Note the date, time of day, what she reported seeing, how long it lasted, and how she reacted. Patterns often emerge: hallucinations may cluster in the evening, worsen when she is tired or dehydrated, or correlate with a new prescription. This kind of record gives clinicians far more to work with than a vague report that “she’s been seeing things.” It also gives you a way to track whether interventions, whether medication changes or environmental adjustments, are actually making a difference over time.