What is the difference between monocular and binocular double vision?

Double vision (double vision) is a condition in which you perceive two pictures of the same thing. Double vision is a frequent term for this disease.

An underlying ailment usually causes this eyesight issue. Identifying and treating the reason can help you regain your vision and prevent the onset of subsequent symptoms.

Monocular double vision and binocular double vision are the two kinds of double vision. A simple test can determine the type of double vision you have.

Cover one eye while double vision occurs. Binocular double vision occurs when the double vision vanishes when one eye is covered.

When the afflicted or “bad” eye is covered, the double vision goes gone, and when the unaffected or “good” eye is covered, the double vision returns.

Binocular Double Vision

Binocular Double Vision

The most frequent kind of double vision is binocular double vision. When your eyes do not line with each other as they should, this happens.

Binocular dual vision sufferers will discover that covering one eye eliminates the double picture.

Asquint is generally the source of binocular double vision, but it might be a sign of a much more severe medical problem if it arises abruptly.

Double vision can be caused by thyroid or artery diseases and diabetes, multiple sclerosis, stroke, and a variety of other severe illnesses.

If you experience double vision, you should schedule an appointment with an eye doctor as soon as possible.

Monocular Double Vision

Monocular Double Vision

Monocular double vision is a type of double vision that affects just one eye. It is far less frequent than binocular double vision.

Only covering the afflicted eye will make the double picture disappear if you have monocular double vision.

A refractive defect like astigmatism or a rare cataract is the most common cause of monocular double vision. It can also be caused by iris, lens, fluid inside the eye abnormalities, and dry eye.


It’s typically simple to distinguish between monocular and binocular double vision. It may be more challenging to determine the reason.

Your symptoms and vision experiences will help determine if you have a double idea.

When you go to the doctor, they’ll note your symptoms and do a few tests to rule out any other visual issues.

They will almost certainly do a quick test to determine the kind of double vision. Once you’ve been diagnosed with double vision, the search for a reason begins.

Causes of monocular double vision

Corneal Shape Changes

The transparent lining over the front of your eye (cornea) tends to weaken and form a cone-shaped protrusion, causing this visual issue.

Double vision, impaired vision, and light sensitivity are all possible side effects of this protrusion. Vision alterations can also be caused by scars or edoema of the cornea.


Your eye’s lens is typically straightforward, but a cataract causes it to become hazy and foggy over time.

This can cause vision issues, such as double vision. Other problems with the lens’s location or shape might also create double vision.


A swollen, fleshy growth on the transparent tissues that protect your eyelids and eyeballs is the primary symptom of this visual disorder (conjunctiva).

This is not a malignant tumour. It’s a rare cause of double vision, and it only happens when the growth completely covers the cornea.

Causes of Binocular Double Vision

Nerve Injury

Peripheral neuropathy is also called nerve injury.   Your eyes’ sensitive nerves are in charge of transmitting information from your eyes to your brain. Any irritation or injury can cause double vision to the nerves.

Cranial Nerve Palsy

The cranial nerves run parallel to your brain’s surface. These nerves can sometimes become paralyzed.

You may experience vision issues, including double vision, as a result of this. The most prevalent causes are diabetes and high blood pressure.


In children, this is a common cause of double vision. The muscles in the eyes have a hard time cooperating. It can cause irreversible vision loss and produce several vision disorders.

In any youngster over the age of four months, this condition necessitates the attention of an eye specialist.

Primary Differences

Binocular double vision is a condition that occurs only while both eyes are open and can be remedied by closing one of them.

Monocular double vision occurs when one eye is covered while the other is not and may typically be repaired with a pinhole. Unilateral or bilateral monocular double vision is possible.

Physiologic double vision is a common occurrence that occurs when the visual axis is not aligned with the objects of interest.


The first step is to figure out whether you have monocular or binocular double vision. Your doctor will instruct you to cover one eye first, then the other.

If you have monocular double vision, your doctor will examine you for diseases that might be causing the impairment, such as cataracts.

After that, you’ll need to see an ophthalmologist (an ophthalmologist). If the issue is binocular and no face damage has occurred, your doctor will want to know if you have diabetes, Graves’ disease, or neurological problems.

Treatment of monocular double vision

Patch Therapy

Patch therapy is a treatment that involves covering one eye and encouraging the use of the weaker eye.

It works best when it comes to assisting young children in strengthening a weak eye. The stronger, the weaker eye becomes, the earlier treatment begins. This is a frequent treatment for squints and lazy eyes.

The brain is forced to utilize the weak eye by covering or occluding the strong eye with an eye patch. Penalization therapy is the name given to this type of treatment.

It penalizes the better-seeing eye, forcing the brain to rely on and use the weaker eye. The ultimate objective is to increase visual clarity and stimulate the simultaneous use of both eyes.

Treatment of Binocular Double Vision

Prescription Glasses

Binocular Double Vision can be corrected using prescription glasses. If the problem has progressed to a lazy eye, the patient will be fitted with an eye patch that compels them to look solely through their weaker eye, strengthening and aligning it.

Botulinum Toxin Injection

In some cases, a botulinum toxin injection is used. The toxin relaxes the muscles around the eye, allowing them to realign in the proper orientation over time.

Unfortunately, adverse symptoms such as increasing double vision, drooping eyelids, or muscular weakness in the injection region might occur.

Orthoptic Exercises

They are exercises used to retrain binocular vision in symptoms such as eyestrain, headaches, eye discomfort, burning, tears, dizziness, and nausea brought on by excessive close-up use, such as reading, computer use, and so on.

A trained technician who specializes in the muscular and sensory components of vision performs them.

Travel sickness, difficulty comprehending texts, spaced reading, and copying mistakes are signs of these problems in school-aged youngsters.

Orthoptic exercises have also been found to enhance surgical results in strabismus patients, and they can be used as a supplement to surgery in individuals with intermittent exotropia.  

The exercise will only take 20 to 30 minutes each day, and you should practice it daily for three months.

After three months, you’ll need to return for an evaluation of your muscles. The orthoptist will also explain whether more exercise is required or if the current activity should be continued.

Why do you need to visit a doctor?

A doctor’s examination is typically required to determine the cause of double vision. The presence of double vision indicates that something is wrong with your eye, brain, or neurological system.

To figure out what’s causing the problem, you’ll need to do a thorough investigation. Any sudden changes in your eyesight, however, require immediate medical treatment.

To avoid irreversible vision loss or life-threatening consequences, some diseases require primary medical care.

Symptom of Double Vision

Double vision has distinct symptoms that can be mistaken for other eye diseases, but it is expected to see two pictures of the same thing.

Another problem is probable if your eyesight is blurry or if you experience interference, such as lights or floaters.

It might be challenging to diagnose double vision in youngsters since they cannot express what they see.

However, if they squint, hide their eyes, or tilt their head oddly, they may have problems. If left untreated, visual impairment in a kid might progress to amblyopia (lazy eye) as the brain attempts to compensate for the defect.


Overall, all the differences between monocular double vision and binocular double vision are acknowledged above. All the differences like causes, treatment, symptoms are acknowledged in this article.

An issue with one of your eyes causes monocular double vision. Binocular double vision might be caused by a problem with your brain or the nerves that control your eyes.

Your doctor can begin investigating the reason for your double vision once they’ve determined which type you have.

Many people who have double vision recover entirely. Depending on the cause, some patients will recover with minimal treatment.

Others may require more attention, but they will recover completely once your doctor has identified the issue.

The double vision and any other symptoms you’re experiencing should go away after addressing the underlying reason.

Additional treatment may be required in a few cases, but most double vision treatments are successful.

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