Ocular Manifestations of Systemic Disorders Practice Questions

Q: In sympathetic ophthalmitis, Dalen-Fuch's nodules are formed on the:

Choroid. **Explanation:** **Sympathetic Ophthalmitis (SO)** is a rare, bilateral granulomatous panuveitis that occurs following a penetrating injury or intraocular surgery in one eye (the "exciting eye"), subsequently affecting the fellow eye (the "sympathizing eye"). **Why Choroid is Correct:** The hallmark histopathological feature of SO is a diffuse infiltration of the **choroid** by lymphocytes and multinucleated giant cells. **Dalen-Fuchs nodules** are pathognomonic lesions formed by the proliferation of Retinal Pigment Epithelium (RPE) cells, macrophages, and epithelioid cells. These nodules are specifically located **between the RPE and Bruch’s membrane**, which is anatomically the innermost layer of the choroid. **Why Other Options are Incorrect:** * **Iris & Ciliary Body:** While SO is a panuveitis (meaning the iris and ciliary body are also inflamed), Dalen-Fuchs nodules are distinct focal aggregations found in the posterior segment. Inflammation in the iris and ciliary body typically presents as "mutton-fat" keratic precipitates and posterior synechiae, rather than these specific nodules. **NEET-PG High-Yield Pearls:** * **Latent Period:** Usually occurs 2 weeks to 3 months after injury (90% within 1 year). * **Sparing of Choriocapillaris:** Unlike other uveitic conditions, the choriocapillaris is typically spared in SO. * **Clinical Sign:** The earliest sign in the sympathizing eye is often a loss of accommodation or mild anterior chamber reaction. * **Management:** Prevention involves enucleation of the injured eye within 10–14 days if it has no visual potential. Treatment involves long-term systemic corticosteroids and immunosuppressants.

Q: Xerophthalmia can be caused by?

All of the above. **Explanation:** Xerophthalmia is a clinical spectrum of ocular surface diseases characterized by extreme dryness of the conjunctiva and cornea. While most commonly associated with Vitamin A deficiency, the term broadly encompasses any condition leading to a pathological "dry eye" state due to structural or functional damage to the tear film components. **1. Vitamin A Deficiency:** This is the most common systemic cause. Vitamin A is essential for the health of the conjunctival epithelium. Deficiency leads to the loss of mucus-secreting goblet cells and squamous metaplasia, resulting in conjunctival and corneal xerosis (the hallmark of xerophthalmia). **2. Stevens-Johnson Syndrome (SJS):** This is a severe mucocutaneous hypersensitivity reaction. It causes extensive scarring of the conjunctiva (symblepharon), destruction of goblet cells, and blockage of the ductules of the lacrimal and accessory lacrimal glands. This leads to severe aqueous and mucin deficiency, causing profound xerophthalmia. **3. Sulfa Drugs:** These are the most common pharmacological triggers for Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis (TEN). By inducing these systemic inflammatory conditions, sulfa drugs indirectly lead to the destruction of the ocular surface and subsequent xerophthalmia. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Classification of Xerophthalmia:** Remember the sequence: **X1A** (Conjunctival xerosis), **X1B** (Bitot’s spots), **X2** (Corneal xerosis), **X3A/B** (Corneal ulceration/Keratomalacia), and **XS** (Corneal scar). * **Bitot’s Spots:** These are triangular, foamy, silvery-white patches on the bulbar conjunctiva (usually temporal) caused by *Corynebacterium xerosis* gas production on keratinized epithelium. * **Earliest Symptom:** Night blindness (Nyctalopia). * **Earliest Sign:** Conjunctival xerosis (though some texts cite impaired Dark Adaptation as the earliest functional sign).

Q: An elderly male with a systemic disease is found to have 'iris pearls' during ophthalmologic evaluation. What is this patient most likely suffering from?

Leprosy. **Explanation:** **Iris pearls** are a pathognomonic clinical feature of **Leprosy (Hansen’s Disease)**, specifically the lepromatous type. These are small, white, sand-like pedunculated nodules found on the iris surface or at the pupillary margin. Pathologically, they represent miliary lepromas containing *Mycobacterium leprae*. They eventually enlarge, coalesce, and may drop into the anterior chamber. **Analysis of Options:** * **Leprosy (Correct):** In addition to iris pearls, ocular involvement includes madarosis (loss of eyebrows/lashes), lagophthalmos (due to 7th nerve palsy), and chronic granulomatous uveitis. * **Eales Disease:** This is an idiopathic peripheral perivasculitis (usually affecting young males). It is characterized by peripheral retinal neovascularization and recurrent vitreous hemorrhages, not iris nodules. * **Sympathetic Ophthalmia:** This is a bilateral granulomatous panuveitis following penetrating trauma to one eye. While it features **Dalen-Fuchs nodules** (located in the choroid/RPE), it does not present with iris pearls. * **High Myopia:** This is associated with degenerative changes such as **Fuchs’ spot** (pigmented macula), lacquer cracks, and posterior staphyloma, but has no correlation with iris nodules. **High-Yield Clinical Pearls for NEET-PG:** * **Iris Pearls:** Lepromatous Leprosy. * **Koeppe/Busacca Nodules:** Seen in granulomatous uveitis (e.g., Sarcoidosis, TB). * **Lisch Nodules:** Melanocytic hamartomas seen in Neurofibromatosis Type 1 (NF-1). * **Brushfield Spots:** White/gray spots on the iris periphery seen in Down Syndrome. * **Most common cause of blindness in Leprosy:** Lagophthalmos leading to exposure keratopathy and corneal ulceration.

Q: Which of the following is a sign of activity in chronic iridocyclitis?

Aqueous cells. In uveitis, distinguishing between **active inflammation** and **sequelae of past inflammation** is crucial for management. **Why Aqueous Cells is the Correct Answer:** Aqueous cells (leukocytes) are the **most reliable and sensitive indicator of active inflammation** in the anterior chamber. Their presence signifies ongoing migration of white blood cells from the iris and ciliary body vessels into the aqueous humor. According to the SUN (Standardization of Uveitis Nomenclature) criteria, the grading of activity is primarily based on the cell count per high-power field. **Why Other Options are Incorrect:** * **Aqueous Flare:** This represents protein leakage into the aqueous due to a breakdown of the blood-aqueous barrier. While it often accompanies cells, flare can persist in a "burnt-out" or chronic stage due to permanent vessel wall damage, even when active inflammation has ceased. Thus, it is a marker of **chronicity or damage**, not necessarily current activity. * **Pigmented KPs (Keratic Precipitates):** These are "old" KPs. During active inflammation, KPs are typically "fresh," white, and round (mutton-fat or small/medium). As the inflammation resolves, these precipitates shrink, become desiccated, and pick up pigment from the uvea. Therefore, pigmented KPs indicate **past episodes of uveitis.** **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard for Activity:** Aqueous cells. * **SUN Grading:** 0 ( 50 cells). * **Hypopyon:** A sign of severe, acute inflammation (commonly seen in HLA-B27 associated uveitis or Behçet’s). * **Mutton-fat KPs:** Suggestive of **Granulomatous uveitis** (e.g., Sarcoidosis, TB). * **Busacca Nodules:** Located on the iris stroma; **Koeppe Nodules:** Located at the pupillary margin. Both indicate granulomatous disease.

Q: Which of the following is true about Bitot's spots?

Seen with fat malabsorption. **Explanation:** **Bitot’s spots** are characteristic ocular signs of Vitamin A deficiency (VAD). Vitamin A is a fat-soluble vitamin; therefore, any condition causing **fat malabsorption** (such as Celiac disease, cystic fibrosis, chronic pancreatitis, or biliary obstruction) can lead to secondary Vitamin A deficiency and the subsequent development of Bitot’s spots. **Analysis of Options:** * **Option C (Correct):** Vitamin A requires bile salts and dietary fat for absorption. Malabsorption syndromes lead to a systemic deficiency, even with adequate intake. * **Option A (Incorrect):** Bitot’s spots do not predispose to pterygium. Pterygium is primarily associated with chronic UV light exposure and ocular surface inflammation. * **Option B (Incorrect):** Bitot’s spots are caused by **squamous metaplasia** of the conjunctival epithelium and a **loss/destruction of goblet cells**, leading to xerosis (dryness). The foamy appearance is due to the accumulation of keratin debris and gas-producing *Corynebacterium xerosis*. * **Option D (Incorrect):** The most common site is the **temporal** side of the bulbar conjunctiva. While they can occur nasally, the temporal location is more characteristic and usually appears first. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Classification:** Bitot’s spots are classified as **Stage X1B**. * **Appearance:** Triangular, foamy, silvery-white patches that are non-wettable. * **Reversibility:** They are generally reversible with high-dose Vitamin A supplementation, though chronic spots in older children may sometimes persist as "sequelae." * **First Symptom vs. First Sign:** The first *symptom* of VAD is Night Blindness (XN), while the first *clinical sign* is Conjunctival Xerosis (X1A). Bitot's spots (X1B) follow.

Q: The highest risk of uveitis in Juvenile Idiopathic Arthritis (JIA) is associated with which subtype?

ANA-positive oligoarthritis. ### Explanation **Correct Option: C (ANA-positive oligoarthritis)** The risk of chronic anterior uveitis in Juvenile Idiopathic Arthritis (JIA) is determined by three primary factors: the subtype of arthritis, the age of onset, and the presence of Antinuclear Antibodies (ANA). * **Oligoarthritis** (involving ≤4 joints) carries the highest risk of ocular involvement (approx. 20–30%). * **ANA positivity** is the strongest immunological predictor, significantly increasing the risk. * **Early onset** (age <6 years) further elevates the risk. Therefore, an ANA-positive young female with oligoarthritis represents the highest-risk phenotype. **Analysis of Incorrect Options:** * **A. RF-positive polyarthritis:** This subtype typically behaves like adult Rheumatoid Arthritis. While joint destruction is severe, the risk of uveitis is relatively low (approx. 5%). * **B. Systemic JIA (Still’s Disease):** Characterized by high-grade fever, evanescent rash, and hepatosplenomegaly. Interestingly, uveitis is **extremely rare** in this subtype. * **D. Enthesis-related arthritis:** This is associated with HLA-B27. While it does cause uveitis, it typically presents as **acute, symptomatic, and unilateral** episodes, unlike the classic "silent" chronic uveitis seen in the oligoarticular type. **High-Yield Clinical Pearls for NEET-PG:** * **The "Silent" Killer:** JIA-associated uveitis is typically **chronic non-granulomatous anterior uveitis**. It is often asymptomatic (white, painless eye) until complications like band-shaped keratopathy, cataract, or glaucoma occur. * **Screening:** Because it is asymptomatic, frequent slit-lamp examinations (every 3 months for high-risk groups) are mandatory. * **Triad of Complications:** Band-shaped keratopathy, complicated cataract, and secondary glaucoma are the classic late-stage findings.

Q: Which of the following is NOT a characteristic sign of Fuch's heterochromic iridocyclitis?

Posterior synechiae. **Explanation:** **Fuchs’ Heterochromic Iridocyclitis (FHI)** is a chronic, low-grade, typically unilateral non-granulomatous uveitis. The hallmark of this condition is its "quiet" nature despite chronic inflammation. **Why Option A is correct:** The most characteristic feature of FHI is the **absence of posterior synechiae**, even in long-standing cases. This is a high-yield clinical differentiator from other forms of chronic anterior uveitis. If posterior synechiae are present, the diagnosis of FHI should be reconsidered. **Analysis of Incorrect Options:** * **Option B:** FHI typically presents in **young adults** (3rd to 4th decade) with no gender predilection. It is often diagnosed incidentally during a routine exam or when the patient notices a change in iris color. * **Option C:** **Posterior subcapsular cataract** is a very common complication of FHI, occurring in approximately 75-85% of cases due to chronic inflammation and long-term metabolic changes in the aqueous. * **Option D:** **Amsler Sign** (or Amsler’s grid sign) refers to filiform hemorrhage at the limbus following paracentesis or minor trauma (like applanation tonometry). It occurs due to the presence of fragile, fine neovascularization in the angle. **High-Yield Clinical Pearls for NEET-PG:** * **Triad of FHI:** Heterochromia (affected eye is usually lighter/hypochromic), diffuse stellate Keratic Precipitates (KPs) distributed over the entire endothelium, and cataract. * **KPs:** Small, round/stellate, white, and connected by fine fibrin threads. * **Glaucoma:** Secondary open-angle glaucoma is a common late complication and is often harder to manage than the cataract. * **Treatment:** Steroids are generally **not** effective or indicated for the chronic low-grade inflammation in FHI.

Q: A 10-year-old boy presents with bilateral chronic uveitis. Which investigation should be ordered?

All of the above. **Explanation:** In a pediatric patient presenting with bilateral chronic uveitis, a comprehensive systemic workup is mandatory because chronic intraocular inflammation in children is frequently a manifestation of an underlying systemic disease rather than an isolated ocular event. **Why "All of the Above" is Correct:** 1. **Hemogram (Option A):** This is a baseline screening tool. An elevated ESR or CRP suggests systemic inflammation. It also helps screen for **Sarcoidosis** (leukopenia/lymphopenia) or **Leukemia**, which can present as a "masquerade syndrome" mimicking chronic uveitis in children. 2. **X-ray of Sacroiliac (SI) Joint (Option B):** This is crucial to rule out **Juvenile Spondyloarthropathies**. While Juvenile Idiopathic Arthritis (JIA)—the most common cause of pediatric uveitis—is often ANA-positive and RF-negative, other variants like Enthesitis-Related Arthritis (ERA) are associated with HLA-B27 and sacroiliitis. 3. **HIV Test (Option C):** Although less common in children than adults, HIV can cause direct uveitis or predispose the patient to opportunistic infections (like CMV retinitis or Toxoplasmosis) that present as chronic inflammation. In the modern NEET-PG context, ruling out infectious etiologies is a standard part of a "uveitis workup." **Clinical Pearls for NEET-PG:** * **Most Common Cause:** Juvenile Idiopathic Arthritis (JIA) is the leading cause of chronic anterior uveitis in children. * **The "Silent" Uveitis:** JIA-associated uveitis is typically **asymptomatic** (white eye), making screening essential to prevent complications like band-shaped keratopathy and cataracts. * **Triad of JIA Uveitis:** Chronic non-granulomatous anterior uveitis, Band-shaped keratopathy, and Complicated cataract. * **High-Yield Association:** ANA positivity in a child with JIA is the strongest risk factor for developing chronic uveitis.

Q: What is the most common nerve involved in herpes zoster ophthalmicus?

Frontal. **Explanation:** **Herpes Zoster Ophthalmicus (HZO)** occurs due to the reactivation of the Varicella-Zoster Virus (VZV) dormant in the **Trigeminal (V) Ganglion**. The virus travels down the **Ophthalmic Division (V1)** of the trigeminal nerve. 1. **Why Frontal Nerve is Correct:** The Ophthalmic nerve (V1) divides into three branches: Frontal, Lacrimal, and Nasociliary. Among these, the **Frontal nerve** is the most frequently involved branch in HZO. It further divides into the supraorbital and supratrochlear nerves, supplying the skin of the forehead and upper eyelid. 2. **Analysis of Incorrect Options:** * **Lacrimal Nerve:** This is the smallest branch of V1. While it can be involved, it is statistically less common than the frontal nerve. * **Nasociliary Nerve:** Though less common than the frontal nerve, its involvement is clinically significant. It supplies the eyeball and the tip of the nose. Involvement of this nerve leads to **Hutchinson’s Sign** (vesicles on the tip of the nose), which is a strong predictor of intraocular inflammation (keratitis/uveitis). * **Oculomotor Nerve (CN III):** This is a motor nerve. HZO primarily affects sensory nerves. While cranial nerve palsies (III, IV, VI) can occur as rare complications of HZO, they are not the primary site of viral reactivation. **High-Yield Clinical Pearls for NEET-PG:** * **Hutchinson’s Sign:** Vesicles on the side or tip of the nose indicate nasociliary nerve involvement and a higher risk of ocular complications. * **Most common ocular complication:** Epithelial keratitis (often presenting as pseudodendrites, which are elevated and lack terminal bulbs, unlike true HSV dendrites). * **Treatment:** Oral Acyclovir (800 mg 5 times daily for 7–10 days) started within 72 hours of rash onset.

Q: Lisch nodules in neurofibromatosis are characterized as which of the following?

Hamartomas. **Explanation:** **Lisch nodules** are the most common ocular manifestation of **Neurofibromatosis Type 1 (NF-1)**, also known as von Recklinghausen’s disease. **1. Why Hamartomas is Correct:** Lisch nodules are histologically defined as **melanocytic hamartomas**. A hamartoma is a benign, focal malformation that resembles a neoplasm but is composed of an abnormal mixture of cells and tissues normally found in that area. In this case, they consist of well-defined collections of spindle-shaped melanocytes on the anterior surface of the iris. They appear clinically as smooth, clear-to-yellowish-brown, dome-shaped elevations. They do not affect vision but are a crucial diagnostic criterion for NF-1 (present in >95% of affected individuals over age 20). **2. Why Other Options are Incorrect:** * **Iris pearls:** These are small, white, glistening deposits found on the iris margin, specifically characteristic of **Leprosy (Hansen’s disease)**. They represent miliary lepromas. * **Granulomas:** These are organized collections of macrophages (often with giant cells) seen in chronic granulomatous inflammations such as **Sarcoidosis** or **Tuberculosis**. While they can appear as nodules (e.g., Koeppe or Busacca nodules), Lisch nodules are developmental hamartomas, not inflammatory granulomas. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnostic Criteria:** The presence of **two or more** Lisch nodules is one of the NIH diagnostic criteria for NF-1. * **NF-1 vs. NF-2:** Lisch nodules are characteristic of **NF-1**; they are typically absent in NF-2. * **Other Ocular Signs of NF-1:** Optic nerve gliomas (most common orbital tumor in NF-1), sphenoid wing dysplasia, and plexiform neurofibromas (S-shaped deformity of the eyelid). * **Slit-lamp examination** is essential for detection, as they may be difficult to see with the naked eye in darkly pigmented irides.

Question 1

In sympathetic ophthalmitis, Dalen-Fuch's nodules are formed on the:

Accepted Answer

Choroid

Answer

Iris

Answer

Ciliary body

Answer

All of the above

Question 2

Xerophthalmia can be caused by?

Accepted Answer

All of the above

Answer

Steven-Johnson syndrome

Answer

Vitamin A deficiency

Answer

Sulfa drugs

Question 3

An elderly male with a systemic disease is found to have 'iris pearls' during ophthalmologic evaluation. What is this patient most likely suffering from?

Accepted Answer

Leprosy

Answer

Eales disease

Answer

Sympathetic ophthalmia

Answer

High myopia

Question 4

Which of the following is a sign of activity in chronic iridocyclitis?

Accepted Answer

Aqueous cells

Answer

Aqueous flare

Answer

Pigmented KPs

Answer

All of the above

Question 5

Which of the following is true about Bitot's spots?

Accepted Answer

Seen with fat malabsorption

Answer

Predispose to pterygium

Answer

Caused by hyperplasia of goblet cells

Answer

Most common site is the nasal side of the conjunctiva

Question 6

The highest risk of uveitis in Juvenile Idiopathic Arthritis (JIA) is associated with which subtype?

Accepted Answer

ANA-positive oligoarthritis

Answer

Rheumatoid factor positive polyarthritis

Answer

Systemic JIA

Answer

Enthesis-related arthritis

Question 7

Which of the following is NOT a characteristic sign of Fuch's heterochromic iridocyclitis?

Accepted Answer

Posterior synechiae

Answer

Typically affects young adults

Answer

Development of posterior subcapsular cataract

Answer

Amsler sign

Question 8

A 10-year-old boy presents with bilateral chronic uveitis. Which investigation should be ordered?

Accepted Answer

All of the above

Answer

Hemogram

Answer

X-ray of sacroiliac joint

Answer

HIV test

Question 9

What is the most common nerve involved in herpes zoster ophthalmicus?

Accepted Answer

Frontal

Answer

Lacrimal

Answer

Nasociliary

Answer

Oculomotor

Question 10

Lisch nodules in neurofibromatosis are characterized as which of the following?

Accepted Answer

Hamartomas

Answer

Iris pearls

Answer

Granulomas

Answer

None of the above

Ocular Manifestations of Systemic Disorders — MCQs

Ocular Manifestations of Systemic Disorders — MCQs

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