What pain pattern is characteristic of posterior scleritis?

Pain often worse with eye movement and out of proportion to external signs Posterior scleritis typically causes significant pain, sometimes worse with eye movement, and frequently out of proportion to the visible external findings.

Pain only on bright light exposure

Painless blurring that develops over weeks

Brief stabbing pain relieved by blinking

What produces the proptosis seen in posterior scleritis?

Posterior scleral and episcleral swelling Proptosis in posterior scleritis arises from swelling of the posterior sclera and episclera.

Retrobulbar haemorrhage behind the globe

Enlargement of the lacrimal gland

Fat prolapse through the orbital septum

On B-scan in posterior scleritis, the T-shaped pattern is outlined against which structure?

The optic nerve shadow Fluid in the sub-Tenon space, outlined against the optic nerve shadow, creates the T-shaped pattern on ultrasound that is highly suggestive of posterior scleritis.

What does orbital CT or MRI contribute in suspected posterior scleritis?

It shows scleral thickening and excludes other causes of proptosis Orbital imaging demonstrates scleral and episcleral thickening and helps exclude other causes of proptosis and pain, such as orbital cellulitis or idiopathic orbital inflammation.

It measures scleral hydraulic conductivity directly

It grades the depth of anterior chamber inflammation

It replaces serological testing for systemic disease

What role do fundus examination and OCT serve in posterior scleritis?

They confirm the systemic autoimmune diagnosis

They establish whether the sclera will perforate

They measure axial length to grade severity

Which imaging feature helps separate posterior scleritis from idiopathic orbital inflammation?

The T-sign, typically absent in orbital inflammation Idiopathic orbital inflammation can mimic posterior scleritis with pain and restricted motility, but it shows a different imaging pattern and typically lacks the T-sign.

Presence of enlarged extraocular muscle bellies

A mass with high internal reflectivity

Diffuse lacrimal gland enlargement

What distinguishes uveal effusion syndrome from posterior scleritis?

It typically lacks pain and the scleral thickening pattern Uveal effusion syndrome can share ultrasound and exudative detachment features with posterior scleritis but typically lacks the pain and the scleral thickening pattern of active scleritis.

It never produces exudative retinal detachment

It is confirmed by a positive ANCA result

It always presents with marked proptosis

How extensive should the systemic workup be in posterior scleritis?

The same evaluation as for anterior scleritis Posterior scleritis shares the systemic disease associations of anterior scleritis and warrants the same evaluation, since it can be the presenting feature of underlying systemic autoimmune disease.

Limited to imaging, since systemic links are absent

Deferred until a second episode occurs

Restricted to infectious screening only

What is appropriate initial treatment for milder posterior scleritis?

Oral NSAIDs Treatment follows the same principles as anterior scleritis and is graded by severity, with oral NSAIDs used for milder cases and systemic corticosteroids reserved for more significant inflammation.

Intravitreal corticosteroid implant

What outcome is expected in posterior scleritis recognised and treated promptly?

Most patients recover good vision and resolution of pain With prompt recognition and appropriate treatment most patients recover good vision and their pain resolves, whereas delayed diagnosis allows exudative detachment or macular edema to cause lasting visual impairment.

Pain resolves but vision rarely recovers

Scleral perforation occurs in most treated eyes

Proptosis becomes permanent despite therapy

Posterior Scleritis: Imaging Signs & Diagnosis

Posterior scleritis is one of the more commonly missed causes of unexplained ocular pain, precisely because the anterior segment can look nearly normal while significant inflammation is occurring behind the equator, out of direct view of a routine slit-lamp examination.

Imaging is what turns the diagnosis from a guess into a confirmed finding, and B-scan ultrasonography is usually the fastest way to get there.

Why Posterior Scleritis Is Missed

Anterior scleritis announces itself with visible redness and scleral swelling that a patient and clinician can both see.

Posterior scleritis, by contrast, can present with severe pain, sometimes the worst symptom the patient reports, in an eye that looks quiet, mildly injected, or only subtly proptotic, so the diagnosis is easy to overlook unless it is specifically considered in the differential for unexplained ocular or periocular pain.

Clinical Features

Pain, often significant, sometimes worse with eye movement, and frequently out of proportion to visible external findings
Proptosis, from posterior scleral and episcleral swelling
Restricted extraocular motility, sometimes mimicking an orbital process
Reduced vision, from choroidal folds, exudative retinal detachment, macular edema, or optic disc swelling when the inflammation involves the posterior pole
Eyelid edema in some patients

The combination of significant pain with a relatively quiet-looking anterior segment, particularly with any degree of proptosis or motility restriction, should raise suspicion for posterior scleritis rather than being dismissed as an unexplained headache or orbital complaint.

Test your knowledge 10 questions from this article

Imaging Findings

B-Scan Ultrasonography

B-scan is often the fastest and most accessible confirmatory test.

Thickening of the posterior sclera and choroid
The classic “T-sign,” in which fluid in the sub-Tenon space, outlined against the optic nerve shadow, creates a T-shaped pattern on ultrasound, a highly suggestive finding for posterior scleritis
Associated findings such as choroidal detachment or exudative retinal detachment in more severe cases

CT and MRI

Orbital imaging shows scleral and episcleral thickening and can help exclude other causes of proptosis and pain, such as orbital cellulitis or idiopathic orbital inflammation, when the clinical picture is ambiguous.

Posterior Scleritis: Imaging the Pain That the External Eye Does Not Explain

Fundus Examination and OCT

Direct examination and OCT can show choroidal folds, disc edema, macular edema, or serous retinal detachment when the posterior pole itself is involved, findings that help confirm posterior segment involvement and provide a baseline to monitor treatment response.

Differential Diagnosis

Idiopathic orbital inflammation, which can produce a similar combination of pain and restricted motility but with a different pattern on imaging and typically without the T-sign (see idiopathic orbital inflammation)
Orbital cellulitis, usually with more overt signs of infection and a source such as sinusitis
Uveal effusion syndrome, which can share overlapping ultrasound and exudative detachment features but typically lacks the pain and scleral thickening pattern of active scleritis (see uveal effusion syndrome)
Choroidal tumor, particularly when a mass-like thickening is present, excluded with careful imaging characterization

Systemic Workup

Posterior scleritis shares the same systemic disease associations as anterior scleritis and warrants the same evaluation, since it can be the presenting feature of an underlying systemic autoimmune disease just as anterior scleritis can (see scleritis classification).

Rheumatoid factor and anti-CCP antibodies
ANCA testing
ANA and other connective tissue disease serology
Infectious workup, including syphilis, when clinically indicated

Management

Treatment generally follows the same principles as anterior scleritis, guided by severity and any identified systemic association.

Oral NSAIDs for milder cases
Systemic corticosteroids for more significant inflammation, particularly with posterior segment involvement threatening vision
Steroid-sparing immunosuppression for recurrent, severe, or systemic-disease-associated cases, coordinated with rheumatology
Treatment of any identified underlying infectious or systemic autoimmune cause

Prognosis

With prompt recognition and appropriate treatment, most patients recover good vision and resolution of pain, though delayed diagnosis can allow complications such as exudative retinal detachment or macular edema to cause more lasting visual impairment.

The central lesson of posterior scleritis is that a normal-looking anterior segment does not rule out serious scleral inflammation, and B-scan ultrasonography is a quick, accessible way to look behind the part of the eye that can be seen directly.

References

Benson WE. Posterior scleritis. Surv Ophthalmol. 1988;32:297-316.
McCluskey PJ, Watson PG, Lightman S, Haybittle J, Restori M, Branley M. Posterior scleritis: clinical features, systemic associations, and outcome in a large series of patients. Ophthalmology. 1999;106:2380-2386.
Chaques-Alepuz V, Diaz-Valle D, Arriola-Villalobos P, Benitez-Del-Castillo JM. Posterior scleritis: descriptive study of the clinical presentation. Arch Soc Esp Oftalmol. 2014;89:293-297.
Sainz de la Maza M, Molina N, Gonzalez-Gonzalez LA, Doctor PP, Tauber J, Foster CS. Clinical characteristics of a large cohort of patients with scleritis and episcleritis. Ophthalmology. 2012;119:43-50.

Test yourself

A few questions straight from this article.

1 / 10 0 correct

What pain pattern is characteristic of posterior scleritis?
Posterior scleritis typically causes significant pain, sometimes worse with eye movement, and frequently out of proportion to the visible external findings.
What produces the proptosis seen in posterior scleritis?
Proptosis in posterior scleritis arises from swelling of the posterior sclera and episclera.
On B-scan in posterior scleritis, the T-shaped pattern is outlined against which structure?
Fluid in the sub-Tenon space, outlined against the optic nerve shadow, creates the T-shaped pattern on ultrasound that is highly suggestive of posterior scleritis.
What does orbital CT or MRI contribute in suspected posterior scleritis?
Orbital imaging demonstrates scleral and episcleral thickening and helps exclude other causes of proptosis and pain, such as orbital cellulitis or idiopathic orbital inflammation.
What role do fundus examination and OCT serve in posterior scleritis?
Direct examination and OCT can show choroidal folds, disc edema, macular edema or serous retinal detachment, confirming posterior segment involvement and providing a baseline for monitoring treatment response.
Which imaging feature helps separate posterior scleritis from idiopathic orbital inflammation?
Idiopathic orbital inflammation can mimic posterior scleritis with pain and restricted motility, but it shows a different imaging pattern and typically lacks the T-sign.
What distinguishes uveal effusion syndrome from posterior scleritis?
Uveal effusion syndrome can share ultrasound and exudative detachment features with posterior scleritis but typically lacks the pain and the scleral thickening pattern of active scleritis.
How extensive should the systemic workup be in posterior scleritis?
Posterior scleritis shares the systemic disease associations of anterior scleritis and warrants the same evaluation, since it can be the presenting feature of underlying systemic autoimmune disease.
What is appropriate initial treatment for milder posterior scleritis?
Treatment follows the same principles as anterior scleritis and is graded by severity, with oral NSAIDs used for milder cases and systemic corticosteroids reserved for more significant inflammation.
What outcome is expected in posterior scleritis recognised and treated promptly?
With prompt recognition and appropriate treatment most patients recover good vision and their pain resolves, whereas delayed diagnosis allows exudative detachment or macular edema to cause lasting visual impairment.

Ahmed Ophthalmologist

Writes and reviews the clinical articles on Educate. Every post is checked against peer-reviewed sources before it goes live.

Posterior Scleritis: Imaging the Pain That the External Eye Does Not Explain