Diseases of the Sclera Practice Questions

Q: Most reliable sign of posterior scleritis is:

T-sign on ultrasound. ***T-sign on ultrasound*** - The **T-sign** on B-scan ultrasound is considered the most reliable diagnostic sign of **posterior scleritis**. - It represents accumulation of **fluid in Tenon's capsule** and is highly specific for the condition. *Disc edema* - While **disc edema** can be a clinical finding in posterior scleritis due to inflammation, it is not specific and can be caused by various other conditions, such as **optic neuritis** or papilledema. - It is not as pathognomonic as the T-sign on ultrasound for confirming the diagnosis. *Choroidal folds* - **Choroidal folds** can occur in posterior scleritis due to scleral inflammation and thickening, which can indent the choroid. - However, choroidal folds can also be seen in other conditions like **orbital tumors** or **hypotony**, making them a less specific indicator. *Exudative detachment* - An **exudative retinal detachment** can occur in severe cases of posterior scleritis due to inflammation and fluid leakage from the inflamed choroid into the subretinal space. - This is a serious complication and a sign of advanced disease, but not the earliest or most reliable diagnostic sign for the condition itself, as it can also be seen in other inflammatory or vascular conditions.

Q: A patient presents with a painful red eye and is diagnosed with scleritis. Which systemic condition is most commonly associated with scleritis?

Rheumatoid arthritis. ***Rheumatoid arthritis*** - Scleritis is an inflammation of the **sclera**, the tough outer white layer of the eye, and is frequently associated with **systemic autoimmune diseases**. [1] - **Rheumatoid arthritis** is the most common systemic disease linked to scleritis, with up to half of all cases of scleritis presenting in patients with underlying systemic conditions. [1] *Diabetes mellitus* - While diabetes can affect the eyes, leading to **diabetic retinopathy** or cataracts, it is not commonly associated with scleritis. - Ocular manifestations of diabetes typically involve microvascular complications rather than inflammation of the sclera. *Hypertension* - Hypertension can lead to various ocular complications, such as **hypertensive retinopathy**, causing damage to the retinal blood vessels. - However, there is no direct or common association between hypertension and the development of scleritis. *Chronic kidney disease* - Chronic kidney disease can cause ocular changes like **uremic red eye** or band keratopathy due to calcium deposits, but it is not a primary cause of scleritis. - Its ophthalmic manifestations are generally distinct from inflammatory conditions like scleritis.

Q: A patient with rheumatoid arthritis presents with severe ocular pain and redness. Examination reveals scleral thinning and areas of necrosis without significant inflammation. What is the most likely diagnosis?

Necrotizing scleritis without inflammation. **Necrotizing scleritis without inflammation** - This condition, often called **scleromalacia perforans**, is characterized by severe scleral thinning and necrosis without significant inflammatory signs in patients with **rheumatoid arthritis (RA)**. - It presents with severe pain and can lead to **scleral perforation** and vision loss due to destructive changes in the scleral collagen. *Episcleritis* - Involves inflammation of the **episclera**, which is the tissue between the conjunctiva and the sclera. - Typically presents with mild discomfort and **sectoral redness**, without scleral thinning or necrosis, and usually resolves spontaneously. *Non-necrotizing scleritis* - Characterized by **painful, intense inflammation** of the sclera (redness, tenderness), often with diffuse or nodular patterns. - While painful, it generally does not involve rapid scleral necrosis or significant thinning, which differentiates it from the necrotizing form. *Anterior uveitis* - Involves inflammation of the **iris** and **ciliary body**, causing pain, redness (often circumcorneal), and **photophobia**. - Does not result in scleral thinning or necrosis but can present with cells and flare in the anterior chamber.

Q: Scleritis is most commonly associated with which of the following conditions?

Rheumatoid arthritis. ***Rheumatoid arthritis*** - **Scleritis**, an inflammation of the sclera, is a serious ocular complication most frequently associated with **rheumatoid arthritis** due to shared autoimmune mechanisms. - The inflammatory process in rheumatoid arthritis can lead to systemic vasculitis, which may affect the scleral blood vessels. *Diabetes* - While diabetes can affect the eyes, it primarily causes **retinopathy**, **cataracts**, and **glaucoma**, rather than scleritis. - Ocular complications in diabetes are mainly due to microvascular damage, not autoimmune-mediated inflammation of the sclera. *Osteoarthritis* - **Osteoarthritis** is a degenerative joint disease and is not associated with systemic inflammation or autoimmune conditions that cause scleritis. - Its pathology is primarily mechanical wear and tear of cartilage, lacking systemic features that would predispose to ocular inflammation. *Hypertension* - **Hypertension** can cause various ocular issues such as **hypertensive retinopathy** and increase the risk of vascular occlusions in the eye. - However, it does not directly lead to scleritis, as scleritis is an inflammatory condition, not a direct result of elevated blood pressure.

Q: Panophthalmitis involves ?

All structures of the eyeball including Tenon's capsule. ***All structures of the eyeball including Tenon's capsule*** - **Panophthalmitis** is a severe inflammation or infection that affects **all coats of the eyeball** (sclera, choroid, retina). - Crucially, it also extends to the **intraocular contents** and the **Tenon's capsule**, leading to potential destruction of the entire eye. *Inner coat of eyeball* - This description is characteristic of **uveitis** (inflammation of the uvea: iris, ciliary body, choroid) or **endophthalmitis** if it extends to the vitreous and retina. - However, **panophthalmitis** is a more extensive condition, involving more than just the inner coats. *Inner and outer coat but sparing tenon's capsule* - This scenario describes **endophthalmitis**, which involves inflammation of the internal structures of the eye (vitreous, retina, choroid) and potentially the sclera. - However, the sparing of Tenon's capsule differentiates it from **panophthalmitis**, which expressly includes involvement of this fibrous sheath. *None of the options* - This option is incorrect because Option C accurately describes the comprehensive nature of **panophthalmitis**, which is an inflammation of all ocular structures, including Tenon's capsule. - The definition of panophthalmitis is critical in distinguishing it from less severe inflammatory conditions of the eye.

Q: What is the most common type of scleritis?

Non-necrotizing scleritis. ***Non-necrotizing scleritis*** - This form of scleritis is the **most prevalent type**, accounting for approximately **85% of all cases**. - It is often subdivided into **diffuse** and **nodular** forms, with diffuse being the most common presentation. - Characterized by **deep, boring pain** and **vascular engorgement** that does not blanch with phenylephrine. *Necrotizing scleritis* - This is a **severe and destructive** form of scleritis, often associated with systemic autoimmune diseases like rheumatoid arthritis, but it is **less common** (~14% of cases). - It involves significant inflammation leading to **scleral thinning** and potential perforation, making it a medical emergency. *Posterior scleritis* - This type of scleritis affects the **posterior segment of the globe**, behind the equator, making it the **least common form** (~2% of cases). - Symptoms can include vision loss, proptosis, and disc edema, often diagnosed by **B-scan ultrasonography** or **CT/MRI**. *Episcleritis* - This is **not a type of scleritis** but rather a **superficial inflammation** of the episcleral tissue between the conjunctiva and sclera. - It is typically **benign, self-limiting**, and presents with **sectoral redness** without severe pain, distinguishing it from true scleritis.

Q: Which structures are most commonly involved in a ciliary staphyloma?

Ciliary body and sclera. ***Ciliary body and sclera*** - A **staphyloma** is a localized bulging of the outer coat of the eye (sclera or cornea) lined internally by uveal tissue. - A **ciliary staphyloma** specifically involves the **ciliary body** and **sclera** at the region of the ciliary body, typically presenting as a dark bluish bulge at the limbal or perilimbal area. - This occurs due to weakening and ectasia of the sclera with prolapse of the underlying ciliary body, commonly seen following scleritis, perforating injuries, or surgeries. *Choroid and sclera* - This combination describes a **posterior staphyloma**, which occurs at the posterior pole of the eye, commonly seen in pathological myopia. - While medically accurate for posterior type, it does not describe a **ciliary staphyloma**. *Iris and sclera* - An **anterior staphyloma** primarily involves bulging of the **cornea** with incarceration of iris tissue, rather than sclera alone. - It occurs after corneal perforation with iris prolapse. *Cornea and conjunctiva* - This does not describe a staphyloma. Bulging of the cornea alone is termed **keratectasia** or **keratoconus**. - The **conjunctiva** is a superficial membrane and is not a structural component of staphyloma formation.

Question 1

Most reliable sign of posterior scleritis is:

Accepted Answer

T-sign on ultrasound

Answer

Disc edema

Answer

Choroidal folds

Answer

Exudative detachment

Question 2

A patient presents with a painful red eye and is diagnosed with scleritis. Which systemic condition is most commonly associated with scleritis?

Accepted Answer

Rheumatoid arthritis

Answer

Diabetes mellitus

Answer

Hypertension

Answer

Chronic kidney disease

Question 3

A patient with rheumatoid arthritis presents with severe ocular pain and redness. Examination reveals scleral thinning and areas of necrosis without significant inflammation. What is the most likely diagnosis?

Accepted Answer

Necrotizing scleritis without inflammation

Answer

Episcleritis

Answer

Anterior uveitis

Answer

Non-necrotizing scleritis

Question 4

Scleritis is most commonly associated with which of the following conditions?

Accepted Answer

Rheumatoid arthritis

Answer

Diabetes

Answer

Osteoarthritis

Answer

Hypertension

Question 5

Panophthalmitis involves ?

Accepted Answer

All structures of the eyeball including Tenon's capsule

Answer

Inner coat of eyeball

Answer

Inner and outer coat but sparing tenon's capsule

Answer

None of the options

Question 6

What is the most common type of scleritis?

Accepted Answer

Non-necrotizing scleritis

Answer

Necrotizing scleritis

Answer

Posterior scleritis

Answer

Episcleritis

Question 7

Which structures are most commonly involved in a ciliary staphyloma?

Accepted Answer

Ciliary body and sclera

Answer

Choroid and sclera

Answer

Cornea and conjunctiva

Answer

Iris and sclera

Diseases of the Sclera — MCQs

Diseases of the Sclera — MCQs

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