Visual hallucinations occupy a strange place in the public imagination. Films and television tend to portray schizophrenia almost entirely through visual experience, when in reality voices are far more common. Visual hallucinations do happen in schizophrenia — studies summarised by the National Library of Medicine place the prevalence at roughly 16–27% — but they often signal that something else is going on as well.
Visual hallucinations can occur in schizophrenia but are also caused by neurological conditions, eye disease, medication effects, and substance use, so a careful workup matters.
What people actually see
Visual hallucinations vary enormously. Some people see simple shapes — geometric patterns, flashes, lattice-like grids. Others see fully formed people, animals, or scenes. The figures may be static or moving, in colour or monochrome, threatening or neutral. They can occupy part of the visual field or replace it completely. Some experiences are brief flickers; others persist for minutes.
Common categories include:
- Elementary — lights, colours, geometric shapes
- Complex — recognisable people, animals, objects, or scenes
- Lilliputian — small figures, classically associated with delirium and Charles Bonnet syndrome
- Autoscopic — seeing one's own body from outside (rare)
Visual hallucinations in schizophrenia
When visual hallucinations occur in schizophrenia, they tend to coexist with auditory ones rather than appearing alone. They are more frequent in early-onset schizophrenia, in acute episodes, and in cases with severe symptoms. They sometimes contain religious or persecutory imagery that mirrors the person's delusions.
Importantly, schizophrenia is not the most common cause of visual hallucinations across all populations. In older adults, neurological causes typically outrank psychiatric ones.
Other major causes
Lewy body dementia and Parkinson's disease
Visual hallucinations — typically of people or animals, often non-threatening — are a core feature of dementia with Lewy bodies. The National Institute of Mental Health and the National Institute on Aging both note that recurrent, well-formed visual hallucinations are part of the diagnostic criteria.
Charles Bonnet syndrome
People with significant vision loss can develop vivid visual hallucinations of patterns or people, even though they have no psychiatric illness and recognise the experiences as not real. This is named for the 18th-century Swiss naturalist who described it in his grandfather. Awareness has grown in recent years; the WHO highlights vision impairment as a major and growing health issue.
Delirium
Acute confusion from infection, dehydration, medication interactions, or substance withdrawal frequently produces visual hallucinations, often along with disorientation. This is a medical emergency.
Substance-related
Many drugs — including hallucinogens, stimulants at high dose, alcohol withdrawal, and certain prescription medications — can cause visual hallucinations. See our piece on drug-induced psychosis.
Neurological lesions and migraine
Stroke, tumours, epilepsy (especially of the occipital or temporal lobes), and migraine aura can all generate visual phenomena.
Visual hallucinations appear suddenly, are accompanied by confusion, fever, headache, weakness, vision changes, or a recent change in medications. Sudden onset usually points to a medical or neurological cause that needs urgent evaluation.
How they are evaluated
A clinician seeing visual hallucinations will usually ask about onset, content, frequency, accompanying symptoms (voices, delusions, confusion), substances, medications, vision, and family history. Tests may include blood work, imaging, and an EEG. The differential diagnosis is wider than for voices, which is why a "schizophrenia explains everything" assumption is rarely safe at first.
Treatment
Treatment depends entirely on cause. In schizophrenia, the same antipsychotics that reduce voices generally help with visual hallucinations. In Lewy body dementia, antipsychotics must be used cautiously because patients are highly sensitive to side effects. In Charles Bonnet syndrome, reassurance and improving vision are first-line; antipsychotics are usually unnecessary.
Practical coping
- Improve lighting — many visual hallucinations are worse in dim settings
- Keep regular sleep — sleep deprivation worsens nearly every form of hallucination
- Track triggers in a journal or app
- Have a trusted person you can check reality with
- Use grounding techniques — name what's around you, touch something cold
What it's like to live with
People who experience visual hallucinations often describe an early period of fear, especially before they have a name for what is happening. Once a clinician helps put the experiences into context — and once medication or other treatment reduces their intensity — many people learn to recognise hallucinations quickly and move on with their day. Frida and similar tools can help track frequency and tie episodes to sleep, stress, or medication changes.
The bottom line
Visual hallucinations are rarer in schizophrenia than the public imagines, but very common across other conditions. If you or someone you love starts seeing things that aren't there, the right response isn't panic — it's a conversation with a clinician who can sort out what's actually happening.
This article is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified mental health professional. If you or someone you know is in crisis, call or text 988 in the US, or your local emergency number.