Lyme Disease Optic Neuritis: Can Lyme Cause Sudden Vision Loss?

Lyme disease optic neuritis may cause blurry vision and central scotoma.
Inflammation of the optic nerve can affect one or both eyes in Lyme disease.
Early recognition and treatment may improve visual recovery.

Lyme disease optic neuritis is a rare but potentially serious neurologic complication that may lead to blurry vision, eye pain, scotoma, or progressive visual loss.

Although optic neuritis is more commonly associated with multiple sclerosis (MS), Lyme neuroborreliosis may also affect the optic nerve and surrounding neurologic structures.

Because symptoms can mimic autoimmune or neurologic disease, Lyme disease optic neuritis may initially be overlooked.

Case report: bilateral optic neuritis in Lyme disease

The case involved a 48-year-old woman with multiple sclerosis who initially presented with fever and sore throat.

Three weeks later, she developed:

• Photophobia
• Eye pressure sensation
• Blurry vision
• Pain with eye movements
• Central scotoma

A scotoma is a blurry or blind spot within the visual field while surrounding vision remains relatively preserved.

MRI imaging and fundus examination confirmed bilateral optic neuritis.

Two months earlier, the woman had removed a tick from her leg but did not report an erythema migrans rash.

Testing for Lyme disease was positive by Western blot.

The patient was hospitalized and treated with intravenous methylprednisolone for three days because of significant swelling, along with ceftriaxone therapy for Lyme disease.

According to the authors, the patient’s visual symptoms improved rapidly following treatment.

For broader neurologic complications, see neurologic Lyme disease.

How Lyme disease may affect the optic nerve

Optic neuritis involves inflammation of the optic nerve, which transmits visual information from the eye to the brain.

Symptoms may include:

• Blurry vision
• Vision loss
• Central scotoma
• Pain with eye movement
• Photophobia
• Reduced color vision
• Eye pressure sensation

In classic optic neuritis, symptoms are often unilateral and painful. However, Lyme disease optic neuritis may present differently.

In the reviewed Lyme disease cases, patients frequently developed bilateral optic nerve swelling along with painless or progressive visual loss.

What researchers found in Lyme optic neuritis cases

Lu and colleagues reviewed 11 reported cases of optic neuritis associated with Lyme disease.

The most common symptoms included:

• Blurry vision
• Headache
• Scotoma
• Painful eye movement

Additional neurologic and systemic symptoms included:

• Paresthesias
• Ataxia
• Arthralgia
• Fatigue
• Weakness
• Myalgia

Only two patients recalled an erythema migrans rash, while most did not remember a tick bite.

Moderate vision loss occurred in many of the reported cases.

The authors noted that patients generally improved following antibiotic therapy with or without corticosteroid treatment.

Can Lyme disease cause blindness?

Severe or untreated Lyme neuroborreliosis affecting the optic nerve may potentially lead to substantial visual impairment.

However, many patients improve when Lyme disease optic neuritis is recognized and treated promptly.

Because visual symptoms may overlap with multiple sclerosis, autoimmune disease, migraine disorders, or idiopathic optic neuritis, Lyme disease may not always be considered initially.

For broader ocular symptoms, see Lyme disease associated with eye problems.

Why Lyme optic neuritis may be missed

Lyme disease optic neuritis may be overlooked because:

• Many patients do not recall a tick bite
• Rashes may be absent
• Visual symptoms overlap with MS and autoimmune disease
• Neurologic symptoms may fluctuate
• Testing limitations may complicate diagnosis

Clinicians practicing in endemic regions may consider Lyme disease in patients with unexplained bilateral optic neuritis or progressive visual symptoms.

For related diagnostic challenges, see Lyme disease misdiagnosis.

Frequently Asked Questions

Can Lyme disease cause optic neuritis?

Yes. Lyme neuroborreliosis may rarely cause inflammation of the optic nerve leading to optic neuritis.

Can Lyme disease cause blurry vision?

Yes. Patients with Lyme disease may develop blurry vision, photophobia, floaters, eye pain, or visual disturbances.

Can Lyme disease optic neuritis affect both eyes?

Yes. Several reported cases involved bilateral optic neuritis with swelling affecting both optic nerves.

Can Lyme disease cause blindness?

Severe optic nerve involvement may lead to significant visual impairment if untreated, although many patients improve with therapy.

Do all Lyme optic neuritis patients recall a tick bite or rash?

No. Many reported patients did not recall a tick bite or erythema migrans rash before developing visual symptoms.

Clinical Takeaway

Lyme disease optic neuritis is an uncommon but important neurologic complication that may present with blurry vision, central scotoma, eye pain, or progressive visual loss.

Because Lyme-related optic neuritis may mimic multiple sclerosis or autoimmune disease, careful clinical evaluation is important in endemic regions and patients with possible tick exposure.

Early recognition and treatment of Lyme disease optic neuritis may improve visual recovery and reduce long-term neurologic complications.

Related Articles

These related articles explore ocular Lyme disease, neurologic complications, visual symptoms, and diagnostic challenges associated with tick-borne illness.

Visual changes due to Lyme disease
Eye problems in tick-borne diseases other than Lyme
Lyme disease symptoms guide
Lyme disease brain fog
Delayed Lyme disease diagnosis

References

1. Lu Y, Zand R. Characteristics of Lyme optic neuritis: a case report of Lyme associated bilateral optic neuritis and systematic review of the literature. BMC Neurol. 2022;22:113.

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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