Double vision
Informed by recognized medical guidance
Overview
Double vision (also called diplopia) means seeing two images of a single object. It can affect one eye (monocular) or both eyes (binocular). The two images may be side by side, one on top of the other, or overlapping. It can happen suddenly or develop over time.
Key facts
- Double vision is often temporary and can be caused by tiredness or eye strain.
- Sometimes it signals a more serious condition that needs medical attention.
- Treatment depends on the underlying cause and may include glasses, exercises, or surgery.
Yes, many people experience double vision at some point in their lives, especially as they get older. It is more common in people with certain eye or neurological conditions.
Anyone can develop double vision, but it is more common in older adults, people with diabetes, high blood pressure, or a history of head injury.
Symptoms
- Sudden double vision along with facial drooping, arm weakness, or slurred speech (signs of a stroke)
- Double vision after a head injury or fall
- Double vision with sudden severe headache, eye pain, or loss of vision
- ⚠Double vision that comes on suddenly without other symptoms
- ⚠Double vision that lasts for more than a few hours or keeps recurring
Common symptoms
- Seeing two overlapping or side-by-side images of one object
- Blurred or distorted vision
- Squinting or tilting the head to see clearly
- Eye strain or discomfort
- Headaches or dizziness
Symptoms in children
- Rubbing eyes frequently
- Tilting the head to one side
- Complaining of headaches or eye pain
- Difficulty reading or concentrating
- Closing one eye to see better
Symptoms in older adults
- Sudden onset of double vision may indicate a stroke or transient ischaemic attack (TIA).
- Gradual onset may be due to cataracts, age-related eye muscle weakness, or nerve problems.
- Double vision after a fall or head injury is more common in older adults.
Causes
Main causes
- Eye muscle problems (e.g., strabismus, where the eyes are not aligned)
- Nerve damage or disorders (e.g., from diabetes, multiple sclerosis, or stroke)
- Cataracts (clouding of the lens)
- Dry eye syndrome
- Problems with the cornea or retina
- Migraines (especially with aura)
- Head injury or trauma
- Certain medications (e.g., those that affect eye muscles)
Risk factors
- Age (over 65 years)
- Diabetes or high blood pressure
- Smoking
- Previous head injury or eye surgery
- Family history of eye muscle problems or strabismus
When to see a doctor
See a doctor urgently if:
- Call emergency services if double vision occurs with symptoms of a stroke (facial droop, arm weakness, slurred speech).
- See a doctor immediately if double vision started after a head injury or is accompanied by severe eye pain or sudden loss of vision.
Book a routine appointment if:
- Make an appointment if double vision lasts more than a few days or keeps coming back.
- See your GP if you have diabetes or high blood pressure and notice double vision.
Diagnosis
Your doctor will ask about your symptoms, medical history, and perform a simple eye exam. They may ask you to cover one eye to see if the double vision disappears (which helps determine if it's in one eye or both).
Tests that may be done
- Visual acuity test (reading an eye chart)
- Cover test (looking at an object while one eye is covered)
- Eye movement test (following a moving object)
- Blood tests (to check for conditions like diabetes or thyroid problems)
- CT scan or MRI of the brain (if a neurological cause is suspected)
What to expect at your appointment
You may be referred to an eye specialist (ophthalmologist) or a neurologist for further evaluation. The doctor will explain the results and discuss treatment options with you.
Treatment
Treatment for double vision focuses on fixing the underlying cause. For many people, the condition improves on its own or with simple measures. Options include eye exercises, special glasses, and medications for underlying health conditions.
Self-care at home
- Rest your eyes – take breaks from screens and close your eyes for a few minutes.
- If double vision is due to dry eyes, use over-the-counter artificial tears (ask your pharmacist for advice).
- Avoid alcohol, which can temporarily worsen double vision.
- For temporary relief, you can gently patch one eye (alternating eyes) to reduce the double image.
Medical treatments
Depending on the cause, your doctor may prescribe treatments such as: glasses with prisms to align the images, botulinum toxin injections to weaken overactive eye muscles, or medications to control conditions like diabetes, high blood pressure, or migraines. If an underlying infection or inflammation is found, specific treatments will be given.
When is surgery considered?
Surgery may be considered if double vision persists despite other treatments, especially if it is caused by eye muscle problems, cataracts, or a condition like strabismus. Your eye specialist will discuss the risks and benefits.
Living with this condition
Living with double vision can be challenging, but simple adjustments help. Use a patch over one eye to reduce double images when needed (alternate eyes to avoid strain). Wear prism glasses if prescribed. Be extra careful when driving or walking, as double vision can affect depth perception and balance.
Lifestyle tips
- Get enough sleep to avoid eye strain.
- Take regular breaks when using screens or reading.
- Maintain good lighting to reduce eye fatigue.
- Avoid activities that require sharp focus when double vision is severe.
Diet and exercise
A healthy diet rich in fruits, vegetables, and omega-3 fatty acids can support eye health. Regular exercise helps control conditions like diabetes and high blood pressure, which can cause double vision. Always check with your doctor before starting a new exercise routine.
Mental health and emotional wellbeing
Double vision can be frustrating and may cause anxiety, difficulty reading, or problems with daily tasks. It can affect your confidence and mood. It's important to talk to your doctor or a counsellor if you feel overwhelmed.
Prevention
Not all cases can be prevented, but you can reduce your risk by managing health conditions (like diabetes and high blood pressure), wearing protective eyewear during sports or risky activities, and having regular eye exams.
Complications
If left untreated
- Worsening of the underlying condition (e.g., untreated diabetes causing permanent nerve damage)
- Persistent double vision that interferes with daily activities, such as driving or reading
- Increased risk of falls and injuries, especially in older adults
- In children, untreated double vision can lead to amblyopia (lazy eye) or permanent vision loss
Long-term outlook
Most cases of double vision improve or resolve with appropriate treatment. Even serious causes, such as stroke or multiple sclerosis, can be managed with prompt medical care. Early diagnosis and treatment give the best chance for a good outcome.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Guidance may differ by country or region. Confirm local recommendations with a qualified healthcare provider.