Ocular Manifestations of Systemic Disorders — MCQs

Ocular Manifestations of Systemic Disorders Indian Medical PG Practice Questions and MCQs

Question 241: Chalcosis is caused by deposition of which metal?

A. Iron
B. Lead
C. Copper (Correct Answer)
D. Mercury

Explanation: **Explanation:** **Chalcosis** refers to the specific intraocular tissue reaction caused by the presence of a **copper**-containing foreign body. Copper is highly toxic to ocular tissues; when the copper content is >85%, it causes severe suppurative endophthalmitis. However, when the content is lower (60-85%), it results in chronic deposition known as Chalcosis. **Why Copper is Correct:** Copper ions have an affinity for basement membranes. Key clinical findings include: * **Kayser-Fleischer (KF) Ring:** Deposition in the **Descemet’s membrane** of the cornea (seen in Wilson’s disease). * **Sunflower Cataract:** Deposition in the **anterior lens capsule**. * It can also deposit in the vitreous and retina (macular "gold-dust" appearance). **Why Other Options are Incorrect:** * **Iron (A):** Deposition of iron in the eye is termed **Siderosis Bulbi**. It typically causes a "rusty" discoloration of the iris, cataract, and pigmentary retinopathy. * **Lead (B):** Lead poisoning (Plumbism) primarily manifests ocularly as optic neuritis or atrophy, but it does not cause a specific deposition syndrome like chalcosis. * **Mercury (C):** Chronic mercury exposure can lead to **Mercurialentis**, characterized by a brownish-rose discoloration of the anterior lens capsule. **High-Yield Clinical Pearls for NEET-PG:** * **Siderosis Bulbi:** Iron deposition; affects the **epithelial cells** (lens epithelium, RPE). * **Chalcosis:** Copper deposition; affects **basement membranes** (Descemet’s, lens capsule). * **Sunflower Cataract vs. Snowflake Cataract:** Sunflower is Copper (Chalcosis/Wilson’s); Snowflake is Diabetes Mellitus. * **KF Ring:** First appears in the superior quadrant, then inferior, then lateral. It is the most sensitive sign of Wilson’s disease.

Question 242: Which of the following is a sign of activity in chronic iridocyclitis?

A. Aqueous cells (Correct Answer)
B. Aqueous flare
C. Pigmented KPs
D. All of the above

Explanation: 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 (<1 cell), 1+ (6-15 cells), 2+ (16-25 cells), 3+ (26-50 cells), 4+ (>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.

Question 243: Increased LDH in aqueous humor suggests which diagnosis?

A. Galactosemia
B. Retinoblastoma (Correct Answer)
C. Glaucoma
D. Gyrate atrophy

Explanation: **Explanation:** **Retinoblastoma** is the correct answer because it is a highly malignant intraocular tumor characterized by rapid cell turnover and anaerobic metabolism. In these cases, the enzyme **Lactate Dehydrogenase (LDH)** is released into the aqueous humor. * **The Diagnostic Ratio:** A high-yield point for exams is the **Aqueous-to-Serum LDH ratio**. In a normal eye, this ratio is less than 1.0. In Retinoblastoma, the ratio typically exceeds **1.5**, making it a useful biochemical marker for diagnosis, especially in atypical presentations. **Analysis of Incorrect Options:** * **Galactosemia:** This is a metabolic disorder leading to "oil droplet" cataracts due to the accumulation of dulcitol in the lens. It does not typically elevate aqueous LDH. * **Glaucoma:** While glaucoma involves increased intraocular pressure and potential optic nerve damage, it is not a neoplastic process and does not show a significant rise in aqueous LDH. * **Gyrate Atrophy:** This is an autosomal recessive chorioretinal degeneration caused by a deficiency of the enzyme **ornithine aminotransferase**. It is characterized by high levels of **ornithine** in the blood and urine, not LDH in the aqueous. **High-Yield Clinical Pearls for NEET-PG:** * **Most common intraocular tumor of childhood:** Retinoblastoma. * **Most common presenting sign:** Leukocoria (White pupillary reflex). * **Pathognomonic Histology:** Flexner-Wintersteiner rosettes. * **Calcification:** Present in 90% of cases (visible on CT scan), a key feature distinguishing it from Coats' disease. * **Other markers:** High levels of **neuron-specific enolase (NSE)** may also be found in the aqueous humor of Retinoblastoma patients.

Question 244: Anterior uveitis is commonly associated with which of the following conditions?

A. Psoriasis
B. Reactive arthritis
C. Ankylosing spondylitis
D. All of the above (Correct Answer)

Explanation: **Explanation:** The correct answer is **D. All of the above**. The underlying medical concept linking these conditions is their strong association with the **HLA-B27** histocompatibility antigen. These disorders belong to a group known as **Seronegative Spondyloarthropathies**, which are characterized by the absence of Rheumatoid Factor and a shared tendency to cause inflammation at the entheses and the uveal tract. * **Ankylosing Spondylitis (AS):** This is the most common systemic association of acute anterior uveitis (AAU). Approximately 25–30% of AS patients develop uveitis, and conversely, about 50% of patients with AAU are HLA-B27 positive. * **Reactive Arthritis (formerly Reiter’s Syndrome):** Classically presents with the triad of "can't see (conjunctivitis/uveitis), can't pee (urethritis), and can't climb a tree (arthritis)." Anterior uveitis occurs in about 20% of cases. * **Psoriasis:** While more commonly associated with blepharitis and conjunctivitis, about 7–10% of patients with **Psoriatic Arthritis** develop acute anterior uveitis. **High-Yield Clinical Pearls for NEET-PG:** 1. **The "PEAR" Mnemonic:** HLA-B27 associated conditions include **P**soriatic arthritis, **E**nteropathic arthritis (IBD), **A**nkylosing spondylitis, and **R**eactive arthritis. 2. **Presentation:** HLA-B27 uveitis is typically **acute, unilateral (but recurrent), and non-granulomatous**, often presenting with a "plastic" aqueous humor (heavy fibrin). 3. **Gender Predominance:** While AS is more common in males, the associated uveitis does not show a strong gender bias. 4. **Most common systemic cause of AAU:** Ankylosing Spondylitis.

Question 245: Koeppe's and Busaca's nodules are characteristic of which type of uveitis?

A. Granulomatous uveitis (Correct Answer)
B. Non-granulomatous uveitis
C. Residual uveitis
D. Recurrent uveitis

Explanation: **Explanation:** The presence of **Koeppe’s and Busacca’s nodules** is a hallmark clinical sign of **Granulomatous Uveitis**. These nodules are inflammatory cell aggregates (typically epithelioid cells and lymphocytes) that signify a chronic, granulomatous process. * **Koeppe’s Nodules:** These are small, translucent nodules located at the **pupillary border**. They are more common and can be seen in both granulomatous and non-granulomatous uveitis, but are highly characteristic of the former. * **Busacca’s Nodules:** These are located on the **anterior surface of the iris stroma**, away from the pupil. They are **pathognomonic for granulomatous uveitis** and are never seen in non-granulomatous cases. **Analysis of Options:** * **A (Correct):** Granulomatous uveitis is characterized by large "mutton-fat" keratic precipitates (KPs) and iris nodules (Koeppe/Busacca). Common causes include Sarcoidosis, Tuberculosis, Syphilis, and Vogt-Koyanagi-Harada (VKH) syndrome. * **B (Incorrect):** Non-granulomatous uveitis typically presents with small, fine KPs and lacks iris nodules. It is usually acute in onset and associated with HLA-B27 conditions. * **C & D (Incorrect):** These terms describe the clinical course (residual/recurrent) rather than the pathological type of inflammation. While granulomatous uveitis can be recurrent, the nodules specifically define the granulomatous nature of the disease. **High-Yield Clinical Pearls for NEET-PG:** 1. **Mutton-fat KPs:** Large, greasy-looking clusters of inflammatory cells on the corneal endothelium; specific to granulomatous uveitis. 2. **Berlin’s Nodules:** Similar nodules found in the angle of the anterior chamber (visible on gonioscopy). 3. **Differential Diagnosis:** If you see Busacca nodules, think **Sarcoidosis** or **Tuberculosis** first.

Question 246: Which of the following is the most common swelling of the eyelids?

A. Chalazion (Correct Answer)
B. Neurofibromatosis
C. Rodent ulcer
D. Dermoid cyst

Explanation: **Explanation:** **1. Why Chalazion is the Correct Answer:** A **Chalazion** (also known as a Meibomian cyst) is the most common inflammatory swelling of the eyelids. It is a **chronic non-infectious granulomatous inflammation** of the Meibomian glands caused by the blockage of gland ducts, leading to the accumulation of lipid secretions. Because Meibomian glands are numerous (approx. 30–40 in the upper lid and 20–30 in the lower lid), this condition is frequently encountered in clinical practice. **2. Analysis of Incorrect Options:** * **Neurofibromatosis (B):** While it can cause a characteristic "S-shaped" deformity of the eyelid (Plexiform Neurofibroma), it is a genetic multisystem disorder and is relatively rare compared to inflammatory conditions. * **Rodent Ulcer (C):** This refers to **Basal Cell Carcinoma (BCC)**. While BCC is the most common *malignant* tumor of the eyelid, it is far less common than benign inflammatory swellings like chalazia. * **Dermoid Cyst (D):** These are congenital choristomas. While common in the orbital region (especially the superolateral quadrant), they are developmental anomalies and do not match the high incidence rate of chalazia. **3. High-Yield Clinical Pearls for NEET-PG:** * **Pain Status:** A chalazion is typically **painless**, distinguishing it from a Hordeolum Externum (Stye), which is an acute, painful staphylococcal infection. * **Histopathology:** Characterized by a **lipogranulomatous reaction** (giant cells, epithelioid cells, and plasma cells). * **Association:** Recurrent chalazia in elderly patients should be biopsied to rule out **Sebaceous Cell Carcinoma**. * **Treatment:** Small ones may resolve spontaneously; larger ones require **Incision and Curettage (I&C)** via a vertical conjunctival incision (to avoid damaging adjacent Meibomian glands).

Question 247: All are causes of chronic granulomatous uveitis except?

A. Sarcoidosis
B. Tuberculosis
C. Brucellosis
D. Fuchs heterochromic iridocyclitis (Correct Answer)

Explanation: ### Explanation The classification of uveitis into **granulomatous** and **non-granulomatous** is based on the clinical appearance of inflammatory deposits and the underlying histopathology. **Why Fuchs Heterochromic Iridocyclitis (FHI) is the correct answer:** FHI is a chronic, typically unilateral, **non-granulomatous** uveitis. While it is chronic in nature, it is characterized by fine, stellate Keratic Precipitates (KPs) distributed diffusely over the entire corneal endothelium. It lacks the classic features of granulomatous inflammation, such as "mutton-fat" KPs or iris nodules (Koeppe/Busacca). **Analysis of Incorrect Options:** * **Sarcoidosis:** A multisystem disease characterized by non-caseating granulomas. It is a classic cause of bilateral granulomatous uveitis, often presenting with large, greasy **mutton-fat KPs** and iris nodules. * **Tuberculosis (TB):** A common cause of granulomatous uveitis in endemic regions like India. It presents with mutton-fat KPs and may show choroidal tubercles or subretinal abscesses. * **Brucellosis:** A systemic zoonotic infection that can cause a chronic granulomatous clinical picture, often involving the posterior segment (multifocal choroiditis). **High-Yield Clinical Pearls for NEET-PG:** * **Granulomatous Uveitis:** Characterized by **Mutton-fat KPs** (composed of epithelioid cells and macrophages), Koeppe nodules (at the pupillary margin), and Busacca nodules (on the iris stroma). Common causes include Sarcoidosis, TB, Syphilis, Leprosy, and Vogt-Koyanagi-Harada (VKH) syndrome. * **Fuchs Heterochromic Iridocyclitis Triad:** 1. Heterochromia iridis (affected eye is usually lighter), 2. Diffuse stellate KPs, 3. Early cataract formation. * **Key Fact:** Patients with FHI are typically asymptomatic (no redness or pain) and do **not** develop posterior synechiae, despite the chronic inflammation.

Question 248: Which of the following is NOT an ocular finding in AIDS?

A. More than 50% of patients have cotton wool spots
B. Kaposi sarcoma of the eyelids
C. Roth spots
D. Cotton wool spots harbor CMV (Correct Answer)

Explanation: ### Explanation The correct answer is **D. Cotton wool spots harbor CMV**. **1. Why Option D is the correct (incorrect statement):** Cotton wool spots (CWS) are the most common clinical finding in HIV retinopathy. However, they are a result of **microvascular ischemia** (retinal arteriole precapillary occlusion) and are **not** caused by direct viral infection of the retina. They represent areas of axoplasmic stasis in the nerve fiber layer. In contrast, CMV retinitis is a direct viral invasion causing full-thickness retinal necrosis, characterized by a "pizza-pie" or "cheese and ketchup" appearance. **2. Analysis of other options:** * **Option A:** HIV microangiopathy (manifesting as CWS) is seen in approximately **50-70% of AIDS patients**, making it the most frequent ocular sign. * **Option B:** **Kaposi Sarcoma** is the most common ocular adnexal tumor in AIDS. It typically presents as a painless, reddish-purple vascular nodule on the eyelids or conjunctiva. * **Option C:** **Roth spots** (retinal hemorrhages with central white spots) can be seen in AIDS, often associated with secondary infections like fungal endophthalmitis or severe anemia/thrombocytopenia. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common ocular finding in AIDS:** Cotton wool spots (HIV Retinopathy). * **Most common opportunistic ocular infection:** CMV Retinitis (occurs when CD4 count < 50 cells/µL). * **CMV Retinitis Treatment:** Intravitreal Ganciclovir or Foscarnet; systemic Valganciclovir. * **Distinguishing feature:** CWS in HIV are transient (disappear in 6-8 weeks), whereas CMV retinitis is progressive and leads to blindness if untreated.

Question 249: Terson syndrome is characterized by:

A. Extradural hemorrhage
B. Subarachnoid hemorrhage (Correct Answer)
C. Intraparenchymal hemorrhage
D. Intradural hemorrhage

Explanation: **Explanation:** **Terson Syndrome** refers to the occurrence of intraocular hemorrhage in association with **Subarachnoid Hemorrhage (SAH)** or, less commonly, traumatic brain injury or intracerebral hemorrhage. **Why Subarachnoid Hemorrhage is correct:** The underlying mechanism involves a sudden, massive increase in intracranial pressure (ICP) due to the SAH. This acute rise in pressure is transmitted through the optic nerve sheath, leading to the compression of the retinal veins (specifically the central retinal vein). This venous stasis results in the rupture of thin-walled retinal capillaries, leading to intraocular bleeding. While classically described as **preretinal (subhyaloid) hemorrhage**, bleeding can also occur in the vitreous or retina. **Why other options are incorrect:** * **Extradural and Intradural Hemorrhages:** These are typically localized arterial or venous bleeds (often traumatic) that do not usually cause the specific, rapid transmission of pressure to the retrobulbar optic nerve required to produce the Terson phenomenon. * **Intraparenchymal Hemorrhage:** While it can occasionally cause Terson syndrome if it leads to a massive secondary rise in ICP or ruptures into the ventricles/subarachnoid space, it is not the primary or classic association defined in medical literature. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** "Boat-shaped" subhyaloid hemorrhage. * **Prognostic Significance:** The presence of Terson syndrome is a poor prognostic indicator, correlating with higher mortality rates and greater neurological deficit in SAH patients. * **Management:** Most intraocular hemorrhages resolve spontaneously, but vitrectomy may be required if the vitreous hemorrhage fails to clear. * **Triad to remember:** SAH + Increased ICP + Intraocular (Preretinal/Vitreous) Hemorrhage.

Question 250: Lisch nodules are seen in:

A. Retinoblastoma
B. Neurofibromatosis (Correct Answer)
C. Retinitis pigmentosa
D. Neuroblastoma

Explanation: **Explanation:** **Lisch nodules** are the most common ocular manifestation of **Neurofibromatosis Type 1 (NF-1)**, also known as von Recklinghausen disease. Pathologically, they are melanocytic hamartomas of the iris stroma. They appear as well-defined, dome-shaped, yellowish-brown elevations on the iris surface. They are typically bilateral, do not affect vision, and their prevalence increases with age (present in >90% of adult NF-1 patients), making them a key diagnostic criterion. **Analysis of Incorrect Options:** * **Retinoblastoma:** This is a primary intraocular malignancy of childhood. The hallmark clinical sign is **leukocoria** (white pupillary reflex), not iris nodules. * **Retinitis Pigmentosa:** This is a hereditary retinal dystrophy characterized by rod-cone degeneration. Key findings include **bony spicule pigmentation** in the mid-periphery, arteriolar attenuation, and waxy pallor of the optic disc. * **Neuroblastoma:** While this childhood tumor can present with ocular signs, the most characteristic finding is **proptosis with periorbital ecchymosis** ("raccoon eyes") due to orbital metastasis, or Horner’s syndrome. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnostic Criteria:** Lisch nodules are one of the NIH diagnostic criteria for NF-1 (2 or more nodules required). * **NF-2 vs. NF-1:** Lisch nodules are **absent** in NF-2. Instead, NF-2 is associated with **PSC (Posterior Subcapsular Cataract)** or combined hamartomas of the retina and RPE. * **Differential Diagnosis:** Do not confuse Lisch nodules with **Koeppe or Bussaca nodules**, which are inflammatory nodules seen in granulomatous uveitis (e.g., Sarcoidosis).

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Hypertension

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Autoimmune Disorders

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HIV and AIDS

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Neurological Disorders

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