Gradual bulging in one or both eyes, especially with a thyroid history, is called proptosis. It commonly points to thyroid eye disease. Sudden bulging, particularly with pain or vision change, is a medical emergency needing same-day care.
A bulging or protruding eye, medically called proptosis, means something behind the eye is pushing it forward, most often swelling of the tissue and muscles around the eye. It can develop gradually over months, commonly linked to thyroid disease, or suddenly, which is far more urgent.
Eyeball Bulging: What Causes It and When It’s a Medical Emergency
Possible Cause
How It Typically Feels
Related Page
Thyroid eye disease (Graves’ disease)
Gradual, often both eyes, may come with dry or gritty eyes, eyelid retraction
Bulging with pain, fever, redness, or swelling of the eyelid
Bulging with reduced vision, double vision, or difficulty moving the eye
Bulging following an injury to the eye or face
When to See a Doctor, Not Urgently
Gradual bulging over months, particularly with a known or suspected thyroid condition
Bulging noticed by others before you noticed it yourself, with no pain
What to Expect at the Eye Check
The exam measures how far each eye protrudes, checks eye movement and vision, and looks for eyelid retraction, a hallmark of thyroid eye disease. Blood tests for thyroid function and, often, an orbital scan follow to confirm the cause.
It’s the most common cause, especially when both eyes are affected gradually, but infection, injury, and rarely a mass behind the eye are other causes that need to be ruled out, especially with sudden or one-sided bulging.
Can bulging eyes affect vision?
Yes, in more advanced thyroid eye disease or when swelling compresses the optic nerve, vision can be affected. This is one of the reasons gradual bulging still warrants a proper evaluation rather than a cosmetic-only view.
Is sudden eye bulging always an emergency?
Yes, treat sudden bulging, especially with pain, fever, or vision change, as an emergency requiring same-day assessment.
Quick Answer: Autoimmune disease can inflame almost any layer of the eye. Episcleritis is usually mild and self-limiting, scleritis is deeper, more painful, and sight-threatening if untreated, uveitis affects the inside of the eye and needs prompt steroid treatment, and Sjogren’s syndrome causes chronic dry eye through damaged tear glands. Anyone on long-term hydroxychloroquine also needs annual retinal screening regardless of symptoms, because toxicity can develop silently.
Autoimmune Disease and Your Eyes: What Rheumatoid Arthritis, Lupus and Sjogren’s Can Do to Your Vision
If you have rheumatoid arthritis, lupus, Sjogren’s syndrome, or another autoimmune condition, your eyes are not a side issue. They are often where the disease shows up first, or where it quietly does the most damage while everyone is focused on joints and skin and bloodwork.
I see this pattern often: a patient on long-term immune therapy who has never had a baseline eye check, or one who assumes a red, painful eye is just dryness when it is actually scleritis. The eye has its own version of almost every autoimmune complication your rheumatologist tracks elsewhere in the body.
In this article, I will cover the five autoimmune eye conditions I see most often: uveitis, episcleritis, scleritis, Sjogren’s-related dry eye, and the retinal toxicity risk from long-term hydroxychloroquine (HCQS) use. I will also flag two related conditions worth knowing about: peripheral ulcerative keratitis and autoimmune optic neuritis.
Uveitis is inflammation inside the eye, affecting the iris, ciliary body, or choroid. It is one of the most common autoimmune eye complications and can occur with ankylosing spondylitis, juvenile idiopathic arthritis, sarcoidosis, Behcet’s disease, and inflammatory bowel disease, among others.
Symptom
What It Means
What To Do About It
Eye pain with redness, often around the iris
Active inflammation of the front of the eye (anterior uveitis)
See an ophthalmologist within 24 to 48 hours; do not wait this out
Sensitivity to light (photophobia)
Inflamed iris muscle spasming in response to light
Dark glasses help short term; this needs treatment, not just avoidance
Blurred vision with floaters
Inflammatory cells or debris in the vitreous (posterior or intermediate uveitis)
Needs dilated examination to localise where the inflammation is occurring
Recurrent episodes in the same or other eye
Suggests an underlying systemic autoimmune trigger rather than an isolated eye problem
Warrants referral back to rheumatology for systemic work-up if not already diagnosed
No pain but gradually worsening vision
Possible chronic or posterior uveitis, which can be painless despite significant inflammation
Do not assume painless means harmless; this still needs urgent assessment
Uveitis not responding to first-line steroid drops
May need systemic immunosuppression or a biologic agent
Co-management between ophthalmology and rheumatology is usually required
Episcleritis
Episcleritis is inflammation of the thin layer just under the conjunctiva. It is usually mild, often recurrent, and frequently mistaken for conjunctivitis.
Symptom
What It Means
What To Do About It
Sudden patch of redness, mild discomfort
Localised inflammation of episcleral vessels, often without a clear trigger
Usually self-limiting; lubricating drops and cold compresses help
Redness that blanches when you press gently with a cotton bud
A useful bedside sign distinguishing episcleritis from deeper scleritis
If it blanches, it is reassuring; if it does not, seek same-day assessment
Mild tenderness but no severe pain
Episcleritis is typically far less painful than scleritis
Severe pain is a red flag that this may be scleritis instead
Recurrent episodes over months or years
Can be idiopathic or linked to mild autoimmune activity
Worth screening for rheumatoid arthritis or other connective tissue disease if recurrent
Nodular, raised area of redness
Nodular episcleritis, a slightly more persistent subtype
May need a short course of topical steroid under supervision
Scleritis
Scleritis is deeper, more severe inflammation of the sclera itself, the white outer wall of the eye. It is strongly associated with rheumatoid arthritis, granulomatosis with polyangiitis, and lupus, and it can threaten vision if untreated.
Symptom
What It Means
What To Do About It
Deep, boring eye pain, often worse at night
Inflammation of the sclera, a much more severe process than episcleritis
Needs same-day ophthalmology assessment; this is not a wait-and-watch condition
Pain radiating to the jaw, brow, or face
Scleral pain frequently refers along trigeminal nerve pathways
Do not dismiss as a headache or sinus issue if accompanied by eye redness
Redness that does not blanch on pressure
Deeper vessel involvement than episcleritis
Confirms the need for urgent evaluation rather than home care
Thinning or a bluish discolouration of the sclera
Sign of necrotising scleritis, a severe and sight-threatening subtype
Associated uveitis, glaucoma, or corneal involvement can occur with severe scleritis
Needs full eye examination, not just treatment of the visible redness
Dry Eye and Sjogren’s Syndrome
Sjogren’s syndrome is an autoimmune condition that attacks the tear and salivary glands directly, producing a more severe and treatment-resistant dry eye than typical age-related dryness.
Symptom
What It Means
What To Do About It
Persistent gritty, burning dryness despite drops
Sjogren’s-related dry eye often does not respond to standard lubricants alone
Needs assessment for Sjogren’s if dryness is disproportionate or progressive
Dry mouth alongside dry eyes
Classic combination pointing to Sjogren’s syndrome affecting both gland systems
Worth a blood test panel (anti-Ro/La) and rheumatology referral
Recurrent corneal erosions or filaments
Severe tear film instability damaging the corneal surface
May need punctal plugs, serum tears, or scleral lenses, not just drops
Dry eye that worsens despite treating typical MGD
Suggests an aqueous-deficient, not just evaporative, dry eye component
Needs Schirmer’s testing and systemic work-up rather than repeating MGD treatment
Joint pain, fatigue, or skin dryness alongside eye dryness
Systemic features suggesting Sjogren’s rather than isolated ocular dryness
Refer to rheumatology for formal diagnosis and systemic management
Hydroxychloroquine (HCQS) Retinal Toxicity
Hydroxychloroquine is a mainstay treatment for lupus, rheumatoid arthritis, and other autoimmune conditions. It is generally safe, but long-term use carries a small, dose-dependent risk of retinal toxicity that is irreversible once it progresses, which is why screening matters even without symptoms.
Symptom
What It Means
What To Do About It
No symptoms at all, but on HCQS for more than 5 years
Toxicity is often silent in early stages and detected only on screening
Annual screening is required regardless of symptoms after 5 years of use
Difficulty reading or patchy missing areas in central vision
Possible bull’s eye maculopathy from established toxicity
Needs urgent retinal evaluation and discussion with rheumatology about dosing
High daily dose relative to body weight
Risk rises above 5 mg/kg/day of real body weight
Confirm dosing with your rheumatologist; weight-based dosing reduces risk
Pre-existing kidney disease or retinal disease
Both increase toxicity risk independent of dose or duration
Flag these conditions before starting HCQS so screening starts earlier
Annual screening showing early paracentral changes on OCT or visual fields
Early, often asymptomatic, sign of toxicity preceding visible vision loss
Usually prompts a dose reduction or drug change in consultation with rheumatology
Important: Screening for HCQS toxicity should start at baseline before treatment begins, then annually after 5 years of use, sooner if risk factors like high dose, kidney disease, or pre-existing retinal disease are present. This typically includes OCT, visual fields, and sometimes multifocal ERG or fundus autofluorescence.
Two More Worth Knowing About
Peripheral Ulcerative Keratitis (PUK)
PUK is a crescent-shaped thinning and ulceration at the edge of the cornea, strongly linked to rheumatoid arthritis and granulomatosis with polyangiitis. It can progress to corneal perforation if untreated and is considered an ophthalmic emergency.
Autoimmune Optic Neuritis
Optic neuritis, inflammation of the optic nerve causing pain on eye movement and vision loss, can occur in multiple sclerosis, neuromyelitis optica, and MOG antibody disease. It needs urgent neuro-ophthalmic assessment, since the underlying diagnosis changes the treatment significantly.
When To See a Doctor
Eye pain that wakes you at night or is described as deep and boring, not surface irritation
Redness that does not blanch when you press a cotton bud gently against it
Any vision change, however mild, alongside eye redness or pain
Dry eye symptoms that do not improve with standard lubricants after a few weeks
Known autoimmune disease with a new eye symptom of any kind
Long-term hydroxychloroquine use without an annual eye screening on record
Eye symptoms appearing before any formal autoimmune diagnosis has been made
What This Means for You
If you have an autoimmune condition, your eye care should not be separate from your rheumatology care. The two specialties need to talk to each other, especially around long-term medications like hydroxychloroquine and around any new eye symptom that could signal a flare. An annual baseline eye check, even with no symptoms, catches problems like HCQS toxicity and early scleritis before they cause permanent damage.
If you are weighing a second opinion on an autoimmune eye diagnosis, our Second Opinion Page outlines how that process works.
Frequently Asked Questions
Can autoimmune eye disease occur before other symptoms appear?
Yes. Uveitis, scleritis, and even dry eye can be the first sign of an underlying autoimmune condition, sometimes appearing years before joint or skin symptoms develop. This is one reason ophthalmologists often refer patients to rheumatology rather than the other way round.
Is hydroxychloroquine safe for long-term use?
Yes, for most people, but it requires monitoring. The risk of retinal toxicity is low at recommended doses but rises with duration of use, higher doses, and certain risk factors like kidney disease. Annual screening after 5 years of use is the standard of care, not an optional extra.
How do I tell episcleritis apart from scleritis at home?
Episcleritis usually blanches, turns paler, when you press a clean cotton bud gently against the white of the eye, and the pain is mild. Scleritis does not blanch and causes deep, often severe pain. If you are unsure, treat it as scleritis until an ophthalmologist tells you otherwise.
Why does Sjogren’s dry eye not respond to normal eye drops?
Sjogren’s syndrome damages the tear-producing glands directly, reducing the volume of tears your eye can make rather than just affecting tear quality. Standard lubricating drops can help but often are not enough on their own, which is why options like punctal plugs or serum tears are considered.
Does treating the autoimmune disease also treat the eye problem?
Often yes, particularly for uveitis and scleritis, where systemic immunosuppression treats both the eye and the underlying disease together. However, some eye complications, like HCQS toxicity or Sjogren’s dry eye, need their own dedicated monitoring and treatment regardless of how well the systemic disease is controlled.
Key Takeaways
Autoimmune disease can affect nearly every layer of the eye, from the surface to the optic nerve
Episcleritis is usually mild; scleritis is deep, painful, and sight-threatening if untreated
Uveitis needs prompt treatment even when painless, since delayed care risks permanent vision loss
Sjogren’s dry eye often needs more than standard lubricants
Anyone on long-term hydroxychloroquine needs annual retinal screening, with or without symptoms
Eye symptoms can be the first sign of autoimmune disease, before a formal diagnosis exists
Book a Consultation
If you have an autoimmune condition and have not had a baseline eye examination, or if you are on long-term hydroxychloroquine without a recent screening, it is worth getting this checked before symptoms appear. Early detection is what makes the difference between a manageable finding and irreversible vision loss in these conditions.
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Last Reviewed: October 2026
Thyroid Eye Disease
Thyroid eye disease occurs when the same autoimmune process affecting your thyroid gland (most commonly Graves’ disease) also attacks the tissue around your eyes, causing inflammation, swelling of the eye muscles and fat, and in some cases bulging (proptosis), double vision, or pressure on the optic nerve. It can occur even if your thyroid levels are currently normal, and it needs a coordinated eye and endocrine assessment rather than eye drops alone.
Thyroid Eye Disease: Why Your Eyes Are Affected When It’s Your Thyroid
Most people are surprised the first time I tell them their eye problem is coming from their thyroid. They came in because their eyes felt gritty, looked more prominent than before, or because a friend mentioned they seemed to be “staring.” Very few connect that to a gland in the neck.
But thyroid eye disease, also called TED or Graves’ orbitopathy, is one of the more common reasons adults develop new eye swelling, bulging, or double vision after the age of 30. It happens when the immune system, already active against the thyroid gland, starts attacking the muscles and fat behind the eyes as well.
In this article, I’ll walk you through what causes it, the symptoms to watch for, when it becomes urgent, and what treatment actually looks like today, because TED is very different to manage now compared to even ten years ago.
Common Symptoms and What They Mean
Symptom
What It Means
What To Do About It
Eyes look more prominent or “staring”
Swelling of the fat and muscles behind the eye is pushing the eyeball forward (proptosis)
Get an orbital assessment; this is a hallmark early sign and worth documenting with photos to track progression
Upper eyelid sits higher than normal, showing white above the iris
Eyelid retraction from overactive muscle tone, common in active TED
See an ophthalmologist; this can also affect blink and corneal protection
Gritty, dry, burning eyes
Reduced blinking and incomplete lid closure from retraction expose the cornea to air
Start preservative-free lubricating drops and gel at night; get evaluated if it doesn’t improve in a week
Double vision, especially looking up or sideways
Swollen eye muscles are restricting movement of one or both eyes
See a neuro-ophthalmologist promptly; this needs muscle assessment, not just glasses
Puffy, swollen eyelids, worse in the morning
Fluid and inflammation in the orbital tissue
Track whether it’s one-sided or both sides, and how quickly it’s changing; report new swelling within days
Redness or a pink tinge over the white of the eye
Inflamed blood vessels from active orbital inflammation
This is a sign of active (not stable) disease; needs assessment for anti-inflammatory treatment
Pain behind the eyes or with eye movement
Active inflammation of the orbital muscles and fat
Flag this to your doctor immediately, it usually indicates the active inflammatory phase requiring treatment
Blurred or dimming vision, especially colour appearing washed out
Possible optic nerve compression from swollen muscles at the back of the orbit
This is an emergency; needs same-week evaluation to prevent permanent vision loss
When To See a Doctor
Any new one-sided bulging or swelling of a single eye
Pain, redness, or warmth around the eye, especially if it’s worsening
New or worsening double vision
Any blurring, dimming, or colour desaturation of vision, this needs urgent same-week assessment for optic nerve involvement
Visible proptosis (the eye appearing pushed forward) that is new or increasing
Inability to fully close the eyelids, especially during sleep
If you already have a thyroid diagnosis and notice any eye changes, even mild ones
Rapid progression of any of the above over days to a few weeks
Important: TED can occur before, during, or after your thyroid levels are treated, and sometimes even when your thyroid blood tests are entirely normal. Don’t rule out TED just because your endocrinologist says your thyroid numbers look fine.
Home Measures
Preservative-free artificial tears during the day, and lubricating gel or ointment at night if the eyes don’t close fully
Sleep with the head slightly elevated to reduce overnight fluid pooling around the eyes
Cold compresses in the morning can reduce lid puffiness, but should not replace medical evaluation
Stop smoking, this is not a general wellness tip here; smoking is the single strongest modifiable risk factor for both developing TED and for it progressing to severe disease
Wraparound sunglasses outdoors, since TED often increases light sensitivity and wind exposure worsens dryness
Medical & Treatment Options
During the active inflammatory phase
This phase typically lasts 6 months to 2 years. Treatment here focuses on controlling inflammation before it causes permanent changes:
Intravenous or oral corticosteroids for moderate to severe active inflammation
Newer targeted biologic therapy (teprotumumab, where available) for significant proptosis or moderate-to-severe active disease
Orbital radiotherapy in select cases, usually combined with steroids
Close coordination with your endocrinologist to stabilise thyroid hormone levels, since both hyperthyroidism and hypothyroidism can worsen eye disease
During the stable (inactive) phase
Once inflammation has settled, any residual bulging, double vision, or lid position problems are usually addressed surgically, in a specific order:
Orbital decompression surgery, if there is significant proptosis or optic nerve compression
Eye muscle surgery, to correct persistent double vision
Eyelid surgery, to correct retraction or reposition the lids
For sight-threatening compression
If the optic nerve is being compressed, this is treated urgently with high-dose steroids and, if needed, emergency decompression surgery to prevent permanent vision loss.
A Note on Glaucoma Risk
Thyroid eye disease can also raise eye pressure. As the swollen muscles and fat crowd the orbit, they can restrict normal fluid drainage from the eye, especially when looking upward, and push pressure readings higher than they’d otherwise be. This is easy to miss because the focus is usually on appearance or double vision, not pressure. If you have TED, ask specifically for an intraocular pressure check at each visit, particularly if you also have a family history of glaucoma. [Learn more about glaucoma risk factors →]
Dry eye is almost universal in thyroid eye disease, not just a side effect of irritation. Eyelid retraction and reduced blinking mean more of the eye surface is exposed to air for longer, so tears evaporate faster than they can be replenished. This is why lubrication needs to be more frequent and more deliberate than for ordinary dry eye, preservative-free drops through the day and a thicker gel or ointment at night, even before any other treatment for TED begins. [Learn more about managing dry eye →]
Frequently Asked Questions
Can thyroid eye disease happen without a thyroid diagnosis?
Yes. In a small proportion of patients, TED symptoms appear before any thyroid abnormality is detected on blood tests. If you develop unexplained eye bulging, lid retraction, or double vision, ask specifically to be screened for thyroid antibodies, even if you feel otherwise well.
Does treating my thyroid levels also treat my eyes?
Not necessarily. Thyroid hormone levels and eye disease activity are related but don’t always move together. Some patients develop or worsen TED even after their thyroid levels are normalised with medication. Eye disease usually needs its own separate treatment plan.
Will my eyes go back to normal?
It depends on severity and how early treatment starts. Mild cases often improve significantly once the active phase settles. Moderate to severe cases, especially with significant proptosis or muscle involvement, usually need surgical correction after the inflammation stabilises to restore appearance and function.
Is thyroid eye disease the same as Graves’ disease?
Not exactly. Graves’ disease is the autoimmune thyroid condition; thyroid eye disease is the eye manifestation that can accompany it. About 25 to 30 percent of people with Graves’ disease develop clinically significant eye involvement, though milder eye changes are more common.
Why does smoking make it worse?
Smoking increases orbital tissue inflammation and has been consistently shown to increase both the risk of developing TED and the severity of disease. It also reduces how well certain treatments work. Quitting is one of the few changes patients can make that measurably affects outcomes.
How urgent is it if I have double vision but no pain?
Painless double vision still needs prompt evaluation. It usually indicates that the eye muscles are already swollen enough to restrict movement, which is a sign of active disease needing assessment, even without pain or visible bulging.
Key Takeaways
Thyroid eye disease is an autoimmune condition affecting the muscles and fat around the eyes, most often linked to Graves’ disease
It can occur even when thyroid blood tests are normal
Early signs include lid retraction, eye prominence, dryness, and puffiness
Double vision, pain, or vision changes need urgent specialist assessment
Smoking is the strongest modifiable risk factor, quitting matters clinically, not just generally
Treatment differs by phase: anti-inflammatory control during active disease, surgical correction once stable
Book a Consultation
If you’ve noticed changes in how your eyes look or work, especially alongside a thyroid diagnosis, it’s worth getting a proper orbital and neuro-ophthalmic assessment rather than waiting to “see if it settles.” Early evaluation during the active phase gives us the most options to prevent permanent changes.
I coordinate closely with endocrinology colleagues to manage thyroid eye disease from both ends, the gland and the eyes, together.
She has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.
