Introduction

Papillitis is a form of optic neuritis, characterised by inflammation of the optic nerve, the nerve that carries visual signals from the eyes to the brain. Specifically, papilledema involves swelling of the optic disk, the portion of the optic nerve located within the eye. The combined function of the optic disk and the optic nerve is to relay visual information to the brain, playing a vital role in vision.1 Given the critical role of the optic nerve, papillitis may result in significant vision loss,  requiring prompt therapeutic intervention. Corticosteroids represent the primary treatment modality and produce favourable outcomes in restoring vision. This article examines the indications, adverse effects, and clinical outcomes of corticosteroid therapy for papillitis. 

Aetiology of papillitis

Papillitis rarely occurs alone. It usually occurs with conditions that cause swelling or lesions in the brain.² Some of the most common causes and related conditions  are:

• Demyelinating diseases: These represent the most prevalent cause of papillitis, characterised by inflammatory damage to the myelin sheath — the protective covering of the optic nerve. The most common disease associated with papillitis is Multiple Sclerosis (MS), in which papillitis is often the first clinical manifestation^2,3 
• Infections: These include bacterial infections like Lyme disease and syphilis, or viral infections like herpes and chickenpox (varicella)²
• Autoimmune disorders: These are conditions in which the body’s immune system attacks its own healthy tissues. For example, Systemic Lupus Erythematosus, Giant Cell Arteritis, and Sarcoidosis²
• Drugs and toxins (rare): Some substances, like methanol, can cause optic nerve swelling²

Papillitis usually occurs in one eye, except in older people, where it can occur in both eyes. People may experience one or more of the following persistent symptoms:

• Eye pain, especially during eye movement²
• Changes in colour vision, such as colours appearing faded or less vibrant²
• Sudden vision loss, which may be either partial or complete²

Treatment of papillitis

Corticosteroids (or steroids) are the primary treatment in people diagnosed with Papillitis. Steroids reduce swelling in the brain, which stops the ongoing damage to the optic nerve. This leads to an improvement in vision and other symptoms. The treatment planning includes:

• Initial assessment to determine the cause and severity of papillitis
• Treatment with corticosteroids 
• Monitoring and Follow-up to assess recovery
• Long-term management plan to avoid further episodes⁴ 

Indications for corticosteroid therapy

Corticosteroids are started early in all patients with an acute presentation of papilledema. Acute presentation refers to individuals who experience a sudden onset of vision loss. The goal of the treatment is to recover visual loss and prevent further episodes. A high dose of the corticosteroid methylprednisolone is given to reduce swelling and restore vision. This usually consists of a 3-day course of methylprednisolone through the veins, followed by the oral tablets of prednisolone.^4,5 

Side effects of corticosteroids

High doses of corticosteroids may lead to several short-term adverse effects, including elevated blood sugar levels, increased blood pressure, mood changes, insomnia, and stomach upset. During treatment, blood glucose and blood pressure are routinely monitored to detect and manage these effects.⁴ 

Long-term corticosteroid use is associated with additional long-term complications such as osteoporosis (weak bones), increased risk of fractures, increased risk of infections, obesity, and cataract. As corticosteroids suppress the immune system, patients are more vulnerable to infections;  therefore, special precautions should be taken to minimise exposure. Additionally, calcium and vitamin D supplements should be considered to prevent osteoporosis and bone-related complications.⁴ 

Outcomes and prognosis

The prognosis and severity of papillitis depend upon the associated disease. Many people recover from the visual loss without treatment within 2-3 weeks.² With appropriate corticosteroid therapy, eye pain typically subsides within a few days to weeks, and nearly 90% of people usually recover vision within 6 months. Papilledema leads to permanent loss of vision in only 3% of patients. However, people who suffer from MS may have worse outcomes related to vision. Many patients who develop papillitis are at an increased risk of later developing MS.⁴ 

Recent studies have shown that treatment with corticosteroids shortens the duration of disease but does not prevent recurrence.⁴ 

FAQs

Is papillitis the same as optic neuritis?

Papillitis is a subtype of optic neuritis. Optic neuritis is the broader term referring to inflammation of the optic nerve, whilst papillitis specifically involves swelling of the optic disc, which is visible during an eye examination. 

How is papillitis diagnosed?

Doctors usually perform an eye exam to look for optic disc swelling. The underlying cause and associated conditions can be identified through additional investigations, including an MRI scan, blood tests, or a lumbar puncture to check for infections, autoimmune disease, or MS.

How common is papillitis?

Papillitis is relatively uncommon. It mostly affects young people and occurs more frequently in women. The condition is often associated with systemic disorders such as  MS, autoimmune disorders, or infections, and rarely occurs alone.

Can papillitis cause permanent blindness?

Yes, but permanent vision loss is rare (about 3% of cases). The risk increases if treatment is delayed or if there is any other associated disease like MS. 

When should I see a doctor?

You should seek medical attention immediately if you notice any of the symptoms of papillitis. Early diagnosis and prompt treatment prevent long-term damage to the optic nerve and vision loss. Treatment is usually given in the hospital as IV steroids, followed by oral tablets.

Can papillitis come back after treatment?

Yes. Corticosteroids help symptoms resolve faster, but it does not prevent recurrence. People with underlying conditions like MS are more likely to experience multiple episodes.

What lifestyle changes can help after papillitis?

• Regular follow-up with an ophthalmologist or neurologist
• Protect bone health if you’re on long-term steroids (calcium, vitamin D, weight-bearing exercise)
• Manage overall health: control blood pressure and blood sugar, and avoid smoking or excessive alcohol consumption

Should I be worried about multiple sclerosis if I have papillitis?

Not necessarily. While papillitis can sometimes be an early manifestation of MS, this is not always the case. Your doctor may recommend an MRI scan to check for brain lesions, which can help determine the likelihood of developing MS and guide further management. 

Conclusion

Papillitis is a serious yet treatable condition that can result in permanent vision loss if not treated early. It is most commonly associated with disorders that cause inflammation or swelling in the brain, particularly Multiple Sclerosis (MS). High-dose corticosteroid therapy remains the standard treatment, and initiating treatment as early as possible is crucial to prevent permanent or ongoing vision loss. Early medical attention, proper diagnosis to find out the cause and treatment with corticosteroids are important to prevent complications and improve the loss of vision.