Healthy Vision: Double Vision and How to Fix It

Diplopia—commonly known as double vision—causes you to see two images of one object. Typically, this vision problem is the result of an underlying condition.

For Healthy Vision Month, we’re looking at (no pun intended) identifying and treating the cause can help you recover your eyesight and stop other symptoms from occurring.

There are two types of diplopia: monocular diplopia and binocular diplopia. You can figure out the type of diplopia you have with a simple test. While the double vision is occurring, cover one eye. If the double vision disappears while covering either eye you have binocular diplopia. In monocular diplopia, the double vision goes away when the affected or “bad” eye is covered, and returns when the unaffected or “good” eye is covered.

Monocular diplopia is the result of a problem with one of your eyes. A problem within your brain or the nerves to your eyes may be the cause of binocular diplopia. Once your doctor identifies which type of double vision you have, they can start looking for the cause.

Causes of monocular diplopia

Monocular double vision occurs due to a problem with one eye and is less common than binocular double vision. Many people with monocular diplopia report that one of the images will be very clear, while the other will be faded or washed out.

Cause: Severe astigmatism

Irregular shape and curvature of your eye can cause blurred vision and double vision.

Cause: Corneal shape changes (keratoconus)

This vision problem occurs when the clear lining over the front of your eye (cornea) begins to grow thin and develop a cone-shaped bulge. This bulge can cause double vision, blurred vision, and sensitivity to light. Scars or swelling of the cornea can also cause vision changes.

Cause: Cataract

The lens that covers your eye is normally clear, but a cataract causes it to grow cloudy and foggy over time. This can lead to vision problems, including double vision. Other problems with the position or shape of the lens can also cause double vision.

Cause: Dry eye

Your eyes constantly produce lubricating fluids. These fluids make blinking or turning your eyes more comfortable. If there isn’t enough fluid, you may experience stinging, itching, and vision problems.

Cause: Pterygium

The primary symptom of this vision problem is a raised, fleshy growth on the clear tissues that cover your eyelids and eyeballs (conjunctiva). This growth is not cancerous. It is a rare cause of double vision and the problem only occurs when the growth covers the cornea.

When to call your doctor

Double vision always requires a doctor’s evaluation to determine the cause. Double vision is a symptom of something abnormal going on within your eye, brain, or nervous system. The problem needs a complete evaluation in order to uncover the cause.

In many cases, the extra image you see in your field of vision is the result of a treatable condition. But any sudden changes in your vision require immediate medical attention.

Some conditions need urgent medical care in order to prevent permanent vision loss or life-threatening complications.

Complications of diplopia

Each possible cause for double vision has potential complications. The causes of double vision can range from something easily correctable to something more complicated, such as a chronic disease.

Some people with double vision may experience nausea or vertigo because of the altered field of vision. Others may experience eye strain and sensitivity to light or sounds.

Life-threatening conditions such infections or brain tumors can cause double vision, but these cases are rare. In these cases, severe eye pain or headache often occurs along with visual changes. Any headache accompanied by vision changes is considered life-threatening and requires immediate medical care.

Diagnosing diplopia

Diagnosing double vision as monocular or binocular is usually straightforward. Determining the cause may be more difficult. If you have double vision, your symptoms and vision experiences will aid in the diagnosis.

When you visit your doctor, they will take note of your symptoms and perform a few tests to look for additional vision problems. They will also likely conduct a brief test to diagnose the type of diplopia.

Once you have a diplopia diagnosis, the work of finding a cause begins. To do this, your doctor will likely perform three types of testing:

1 Take stock of your current state of health

You and your doctor may spend some time updating your health history. This includes:

A full history of your symptoms: Fully describing your vision problems to your doctor can help them eliminate possible causes and decide on what tests may be helpful. Be sure to let your doctor know of any unusual symptoms you’ve experienced, even if you aren’t sure they’re related to your vision problem.

Your personal health history: Your doctor may consider underlying factors like diabetes, thyroid problems, or neurological disorders that could be causing your vision problems.

Your family health history: If family members had vision problems or disorders that can lead to double vision, let your doctor know. These issues may be a good starting point for your own diagnosis.

2 Physical exam

A full physical exam can help your doctor find and identify possible causes for your double vision. This exam may include:

  • blood tests to look for an infection
  • vision check and dilated eye exam
  • eye movement tests
  • toxicity tests
  • blood sugar readings
  • imaging tests, such as a CT scan or MRI

Treatments and home remedies for diplopia

Before deciding on a treatment, it’s important you and your doctor find the cause of the vision problem. In many cases, vision issues can go away once you correct or treat the underlying issue.

The most common treatments for diplopia include:

Corrective lenses

Eyeglasses or special lenses may correct the vision problem. For example, prisms may be etched into the lenses of your eyeglasses to adjust your vision.

Eye patch or cover

Covering one eye may stop the double vision. While this may not be a long-term solution, an eye cover can help manage double vision until there is a more permanent solution.

Eye exercises

If your vision problem is the result of strained or weakened eye muscles, your doctor can provide you with “exercises” that can help you regain eye muscle strength. As the muscles become stronger, your vision issues should improve.


Depending on the cause, you might require surgery to correct any physical issues. Also, people with issues like cataracts or problems within the eye likely will need surgery at some point. The surgery to correct that problem should also fix any double vision.

In summary…

People with double vision often make a full recovery. Some people will recover with minimal treatment depending on the cause. Others may need more care, but still experience a full recovery once your doctor identifies the problem.

Once the underlying cause is treated, the double vision and any other symptoms you’re experiencing should go away. In a few cases, you’ll need additional treatment, but most efforts to treat diplopia are successful.

Some common causes of double vision can come back. These include cataracts and cranial nerve palsy. In these cases, it’s important you work with your doctor to identify the problem as soon as it starts so you can begin treatment if the vision problems return.

  • Jeffrey Dutton
    Posted at 10:30h, 01 August

    Very informative

  • Jennifer Williams
    Posted at 07:50h, 01 August

    Good article

  • Isoken Osunde
    Posted at 02:13h, 01 August

    Thank you for the knowledge.

  • Bonita Marsh
    Posted at 12:34h, 31 July

    Thank you

  • Robyn Latham
    Posted at 10:04h, 31 July


  • Darlene Wilson
    Posted at 12:15h, 30 July

    Good article. Useful info.

  • Darlene Wilson
    Posted at 12:14h, 30 July

    Good article.

  • Dj
    Posted at 09:29h, 30 July


  • Raitiesia Collins
    Posted at 04:59h, 30 July

    So much information in thso article Thanks

  • Rosemary Rodriguez
    Posted at 13:19h, 29 July

    Thank you!

  • Judy Neumann
    Posted at 12:49h, 29 July


  • Latroyne Bennifield
    Posted at 09:54h, 29 July

    Great info

  • Greg Boyd
    Posted at 07:54h, 29 July

    Thanks for the info. Sorry I am late. Just getting back into the swing.

  • Estella Robertson
    Posted at 07:10h, 29 July

    Thanks for the information.

  • Stella Stanley
    Posted at 00:41h, 29 July

    Oh wow thanks

  • Richard Swing
    Posted at 11:27h, 28 July


  • Tammy RHOADES
    Posted at 08:22h, 28 July


  • Katherine Crawford
    Posted at 18:05h, 27 July

    Thank you for this info , helpful..

  • Ernesto Samaniego
    Posted at 15:38h, 27 July


  • Ernesto Samaniego
    Posted at 15:37h, 27 July

    Thank you 7/222

  • Ella Rollins
    Posted at 15:23h, 27 July


  • William W. Jacobs
    Posted at 14:15h, 27 July

    Very informative, thank w

  • Brenda L Nicholson
    Posted at 13:32h, 27 July


  • Samara Jones
    Posted at 13:08h, 27 July


  • Vesna Corlukic
    Posted at 12:54h, 27 July

    Thank you!

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