Can Lyme Disease Cause Double Vision? Cranial Nerve Palsy Explained

Lyme disease can rarely cause double vision
Inflammation may affect the cranial nerves controlling eye movement
Prompt diagnosis and antibiotic treatment can lead to recovery

Can Lyme disease cause double vision? Yes. Lyme disease can rarely cause double vision (diplopia) when Lyme neuroborreliosis affects one of the cranial nerves responsible for controlling eye movement. Lyme disease may also rarely cause inflammation involving the muscles and tissues around the eye.

Although facial nerve palsy is the most common cranial neuropathy associated with Lyme disease, inflammation involving the third, fourth, or sixth cranial nerves may disrupt eye alignment and lead to double vision.

Lyme disease has also been associated with a variety of vision problems, including blurred vision, double vision, eye pain, light sensitivity, optic nerve inflammation, and, rarely, vision loss.

Published cases illustrate that double vision can occur through more than one mechanism. Some patients develop a cranial nerve palsy, while a 2023 report described painful double vision associated with inflammation of the extraocular muscles and surrounding orbital tissues.^1,3

Prompt recognition of neurologic or ocular Lyme disease is important because patients in these reports improved following appropriate antibiotic treatment.

A published case report describes a 69-year-old man who developed headache and double vision after hiking in a rural area of New York. His symptoms were ultimately attributed to Lyme disease involving the third cranial nerve.

A Patient Develops Headache and Double Vision

In their report, Dixit and colleagues describe a 69-year-old man who presented to an emergency department in New York City complaining of headache and double vision.¹

One month earlier, the man had been hiking in a rural area of New York. He did not recall a tick bite or notice an erythema migrans rash.

Two weeks later, he developed a headache that began in the right occipital region and gradually moved toward his right orbit.

Five days later, he noticed double vision whenever both eyes were open. Covering his right eye eliminated the double vision, a finding consistent with binocular diplopia caused by eye misalignment.

Why Can Lyme Disease Cause Double Vision?

Normal binocular vision depends on precise coordination of both eyes. Cranial nerves III (oculomotor), IV (trochlear), and VI (abducens) control the muscles responsible for eye movement.

Inflammation affecting one of these nerves can prevent the eyes from moving together normally, causing the brain to receive two different images. The result is binocular diplopia, or double vision.

The third cranial nerve controls several eye muscles, raises the upper eyelid, and helps regulate pupil size. In the Dixit patient, physical examination revealed an isolated third cranial nerve palsy. The remainder of his neurologic examination was normal.¹

Facial nerve involvement is considerably more common in Lyme neuroborreliosis than ocular motor nerve palsy. Nevertheless, involvement of the nerves controlling eye movement has been documented in published cases.

At the time of publication, Dixit and colleagues described their case as the first reported isolated third cranial nerve palsy associated with Lyme neuroborreliosis.¹

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Can Lyme Disease Cause Painful Double Vision?

Yes. A 2023 case report illustrates another unusual mechanism by which Lyme disease may be associated with painful double vision: orbital myositis.

Biso and colleagues reported the case of a 69-year-old man living in upstate New York who developed painful double vision, eyelid swelling, conjunctival chemosis, and numbness on the left side of his face.³

Importantly, he did not recall a tick bite and had no rash or fever.

Examination revealed facial nerve palsy, protrusion of the eye (proptosis), and impaired eye movement (ophthalmoplegia). MRI of the brain and orbits showed asymmetric enlargement and enhancement of the extraocular muscles along with inflammation of the surrounding orbital fat. The findings were compatible with orbital myositis.³

What Is Orbital Myositis?

Orbital myositis is inflammation involving one or more of the muscles that move the eye. Because these muscles normally coordinate eye movement, inflammation and swelling can produce eye pain, restricted eye movement, and double vision.

The condition can have several possible causes, so Lyme disease should not be assumed to be responsible for every case of orbital myositis.

In the Biso case, however, Lyme antibody testing was positive and confirmed by immunoblot. Cerebrospinal fluid showed lymphocytic pleocytosis and elevated protein. Evaluation for malignancy, thyroid disease, sarcoidosis, IgG4-related disease, autoimmune disorders, and other infections did not identify another explanation.³

The patient was treated with intravenous ceftriaxone and experienced significant clinical improvement, with near resolution of his symptoms after one month. Repeat MRI two months later also demonstrated improvement.³

This case expands the differential diagnosis of Lyme-associated double vision. Diplopia may reflect a cranial nerve palsy, but painful double vision accompanied by eye swelling or restricted eye movement may involve inflammation within the orbit itself.

How Was Lyme Disease Diagnosed in the Cranial Nerve Case?

In the Dixit case, serologic testing was positive by enzyme-linked immunosorbent assay (ELISA). Western blot testing demonstrated five of the ten reported IgG bands.¹

The patient also underwent lumbar puncture. Cerebrospinal fluid tested positive by ELISA, although the cerebrospinal fluid-to-serum antibody ratio was negative.

Diagnosing neurologic Lyme disease requires consideration of the patient’s exposure history, clinical presentation, physical examination, and laboratory findings. Cerebrospinal fluid analysis may provide supportive evidence but should be interpreted within the overall clinical context.

How Was the Double Vision Treated?

The patient described by Dixit and colleagues was treated with a four-week course of intravenous ceftriaxone. His headache and double vision resolved following treatment.¹

The orbital myositis patient described by Biso and colleagues also received intravenous ceftriaxone and experienced substantial improvement.³

These cases illustrate that improvement can occur even when Lyme disease presents with an uncommon neurologic or orbital manifestation.

Can Lyme Disease Cause Double Vision When the MRI Is Normal?

Yes. A normal or nonspecific MRI does not necessarily exclude Lyme neuroborreliosis or cranial nerve involvement.

A 2026 case report described a 54-year-old woman with persistent headaches followed by double vision and sixth cranial nerve palsy. Her brain MRI showed only small white-matter findings considered age-appropriate and did not identify a structural explanation for her symptoms.²

Cerebrospinal fluid analysis revealed marked lymphocytic inflammation and intrathecal production of antibodies to Borrelia, supporting a diagnosis of Lyme neuroborreliosis. The patient improved after beginning intravenous ceftriaxone.²

The case illustrates that imaging and cerebrospinal fluid provide different information. MRI may help identify or exclude certain structural disorders, while spinal fluid analysis may reveal inflammation that is not apparent on routine imaging.

Can Lyme Disease Affect Vision in Other Ways?

Yes. Lyme disease has been associated with a variety of ocular manifestations and vision problems. Reported manifestations include:

• Blurred vision
• Double vision
• Eye pain
• Light sensitivity
• Cranial nerve palsies
• Optic nerve involvement
• Uveitis
• Retinal inflammation
• Orbital myositis
• Rare cases of severe vision loss

Many ocular complications of Lyme disease are uncommon, and most visual symptoms have causes other than Lyme disease. Nevertheless, Lyme disease may warrant consideration when new neurologic or ocular symptoms occur in a compatible clinical and exposure setting.

In their review, Sathiamoorthi and Smith summarized ocular manifestations of tick-borne diseases. They emphasized the importance of recognizing systemic and ophthalmic manifestations when evaluating patients for tick-borne disease.⁴

Patients who experience sudden vision loss, persistent double vision, severe eye pain, drooping of the eyelid, unequal pupils, weakness, or other acute neurologic symptoms should seek prompt medical evaluation.

Frequently Asked Questions

Can Lyme disease cause double vision?

Yes. Although uncommon, Lyme disease can cause double vision (diplopia). Published cases describe cranial nerve palsies affecting eye movement as well as orbital inflammation involving the extraocular muscles.

Can Lyme disease cause painful double vision?

Yes. A 2023 case report described painful double vision associated with Lyme disease and orbital myositis. The patient also had eyelid swelling, facial numbness, proptosis, facial palsy, and restricted eye movement.

Can Lyme disease cause eye swelling?

Rarely. The orbital myositis case described eyelid swelling, conjunctival chemosis, proptosis, and inflammation of the extraocular muscles and surrounding orbital tissues. Eye swelling has many other potential causes and requires appropriate medical evaluation.

Can Lyme disease cause double vision with a normal MRI?

Yes. Published cases describe Lyme neuroborreliosis presenting with double vision even when brain MRI does not identify a structural explanation. However, new double vision requires prompt evaluation for other neurologic, vascular, and ophthalmologic causes.

Can Lyme disease affect your eyes?

Yes. Lyme disease has been associated with blurred vision, double vision, eye pain, light sensitivity, cranial nerve palsies, optic nerve involvement, uveitis, retinal inflammation, orbital inflammation, and other ocular manifestations.

Can Lyme disease cause blurry vision?

Blurry vision has been reported in patients with Lyme disease. Because blurry vision has many possible causes, persistent or sudden visual changes require medical evaluation.

Can Lyme disease cause blindness?

Permanent blindness associated with Lyme disease is rare. However, serious ocular complications can threaten vision, making prompt evaluation of significant visual symptoms important.

Clinical Takeaway

Lyme disease can rarely cause double vision through several different mechanisms.

Published cases describe third and sixth cranial nerve palsies associated with Lyme neuroborreliosis. The 2023 Biso case adds another mechanism: orbital myositis with inflammation and enlargement of the extraocular muscles and surrounding orbital tissues.^1-3

The orbital myositis patient is particularly instructive because he had painful double vision and eye swelling but did not recall a tick bite and had no rash or fever.³

A normal or nonspecific brain MRI also does not necessarily exclude cranial nerve involvement associated with Lyme neuroborreliosis. Conversely, painful double vision accompanied by eye swelling or restricted movement may produce striking abnormalities on orbital MRI.

Persistent double vision, painful eye movement, eye swelling, vision loss, or other acute neurologic or ophthalmologic symptoms require prompt medical evaluation. Lyme disease is one consideration among many possible causes, particularly when the clinical and exposure history is compatible.

Related Articles

• Can Lyme Disease Cause Vision Problems? Binocular Vision Dysfunction Explained
• Can Lyme Disease Cause Vision Loss?
• Can Lyme Disease Affect Your Eyes? Vision Problems and Eye Symptoms
• How Does Lyme Disease Affect the Brain? New fMRI Study Reveals White Matter Changes

References

1. Dixit A, Garcia Y, Tesoriero L, Berman C, Rizzo V. Diplopia: A Rare Manifestation of Neuroborreliosis. Case Rep Neurol Med. 2018;2018:9720843. doi:10.1155/2018/9720843.
2. Sobczak M, Morajko A, Urantowka N, Moszko K, Labuz-Roszak B. The Hidden Face of Lyme Disease: Neuroinfection With Cranial Nerve Involvement. Cureus. 2026;18(2):e103747. doi:10.7759/cureus.103747.
3. Biso GM, Mangla R, Eldokla AM. Orbital Myositis as an Initial Presentation of Lyme Disease. Neurology. 2023;101(20):914-915. doi:10.1212/WNL.0000000000207742.
4. Sathiamoorthi S, Smith WM. The Eye and Tick-Borne Disease in the United States. Curr Opin Ophthalmol. 2016;27(6):530-537. doi:10.1097/ICU.0000000000000308.

This article is for informational purposes only and does not constitute medical advice, diagnosis, or treatment.

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Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.

Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention