Ocular Manifestations of Systemic Disorders — MCQs

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

Question 291: All of the following can be seen in patients with accelerated hypertension which can lead to visual loss, EXCEPT:

A. Vitreous haemorrhage
B. Glaucoma (Correct Answer)
C. Cotton wool spots
D. Retinal detachment

Explanation: In accelerated (malignant) hypertension, the primary pathology involves severe arteriolar narrowing, fibrinoid necrosis of vessel walls, and breakdown of the blood-retinal barrier. **Why Glaucoma is the Correct Answer:** Glaucoma is **not** a direct feature of hypertensive retinopathy. While chronic hypertension is a minor risk factor for primary open-angle glaucoma, it does not acutely cause glaucoma in the context of accelerated hypertension. The vision loss in malignant hypertension is typically due to retinal or optic nerve involvement, not elevated intraocular pressure. **Explanation of Incorrect Options:** * **Vitreous Haemorrhage:** Severe hypertension can lead to the rupture of retinal capillaries or superficial flame-shaped hemorrhages. If these bleed into the vitreous cavity, sudden vision loss occurs. * **Cotton Wool Spots:** These represent focal areas of retinal ischemia (micro-infarcts) in the nerve fiber layer due to the occlusion of terminal arterioles. They are a hallmark of Grade III and IV hypertensive retinopathy. * **Retinal Detachment:** Accelerated hypertension can cause **Exudative Retinal Detachment**. This occurs due to fibrinoid necrosis of the choroidal arterioles (Elschnig’s spots), leading to subretinal fluid accumulation. **High-Yield Clinical Pearls for NEET-PG:** * **Keith-Wagener-Barker Classification:** Grade IV is defined by the presence of **Papilledema** (optic disc edema), which is the hallmark of malignant hypertension. * **Macular Star:** Formed by the deposition of hard exudates in the Henle’s layer of the retina. * **Siegrist Streaks:** Linear hyperpigmented streaks over choroidal vessels, indicating chronic hypertensive damage. * **Elschnig Spots:** Small black spots surrounded by yellow halos, representing focal choroidal infarcts.

Question 292: A patient presented with reddish discoloration of the eye for the past 2-3 weeks, with no associated pain or history of injury. A probable diagnosis of ocular lymphoma was made. Which of the following cannot be an associated complaint in cases of ocular lymphoma?

A. Loss of vision
B. Proptosis
C. Diplopia
D. None of the above (Correct Answer)

Explanation: **Explanation:** Ocular lymphoma, particularly **Primary Vitreoretinal Lymphoma (PVRL)** and **Orbital Lymphoma**, can present with a wide spectrum of clinical features depending on the site of involvement. 1. **Why "None of the above" is correct:** The question asks which of the following *cannot* be an associated complaint. Since loss of vision, proptosis, and diplopia are all well-documented manifestations of ocular lymphoma, none of them can be excluded. * **Loss of vision (A):** Common in PVRL due to vitreous haze (masquerade syndrome) or retinal involvement. * **Proptosis (B):** The most common presenting sign of **Orbital Lymphoma** (usually MALToma), where a lymphoid mass occupies the orbital space, displacing the globe forward. * **Diplopia (C):** Occurs when orbital lymphoma infiltrates or compresses the extraocular muscles, leading to restricted ocular motility. 2. **Why other options are incorrect:** Options A, B, and C are incorrect because they are all classic symptoms of the disease. The "reddish discoloration" mentioned in the stem often refers to a **"Salmon-patch" appearance**, which is pathognomonic for conjunctival lymphoma, but the malignancy can simultaneously involve deeper orbital structures leading to the listed symptoms. **High-Yield Clinical Pearls for NEET-PG:** * **Masquerade Syndrome:** PVRL is the classic "masquerade syndrome," often misdiagnosed as chronic posterior uveitis unresponsive to steroids. * **Salmon-patch appearance:** Characteristic of conjunctival lymphoma (usually B-cell MALT type). * **CNS Association:** PVRL has a very high association with **Primary CNS Lymphoma (PCNSL)**; if ocular lymphoma is suspected, a brain MRI and CSF analysis are mandatory. * **Cytology:** The gold standard for diagnosis of PVRL is a **diagnostic vitrectomy** showing malignant B-cells (large cells with scanty cytoplasm and prominent nucleoli).

Question 293: Snowball opacities are seen in which of the following conditions?

A. Acute anterior uveitis
B. Posterior uveitis
C. Pars planitis (Correct Answer)
D. None of the above

Explanation: **Explanation:** **Pars planitis** is a specific subset of intermediate uveitis characterized by idiopathic inflammation of the *pars plana* (the posterior part of the ciliary body). The hallmark clinical features of this condition are **snowball opacities** and **snowbanking**. 1. **Snowballs:** These are whitish, inflammatory aggregates of cells and exudates floating in the inferior vitreous. They represent localized vitreous condensation. 2. **Snowbanking:** This refers to the accumulation of white exudates (fibrovascular membranes) over the *pars plana*, typically seen in the inferior quadrant using indirect ophthalmoscopy with scleral depression. **Analysis of Options:** * **Option A (Acute anterior uveitis):** This primarily involves the iris and ciliary body. Clinical signs include aqueous cells, flare, and Keratic Precipitates (KPs) on the corneal endothelium, but not vitreous snowballs. * **Option B (Posterior uveitis):** This involves inflammation of the retina or choroid. While vitreous haze may occur, "snowballs" are specifically diagnostic of intermediate uveitis/pars planitis. * **Option D:** Incorrect, as Pars planitis is the classic association. **High-Yield Clinical Pearls for NEET-PG:** * **Most common symptom:** Blurred vision and floaters (painless). * **Most common complication:** Cystoid Macular Edema (CME), which is the leading cause of vision loss in these patients. * **Associated systemic conditions:** Though pars planitis is idiopathic, intermediate uveitis can be associated with **Multiple Sclerosis** and **Sarcoidosis**. * **Treatment:** Topical or periocular steroids are the first line of management.

Question 294: Which of the following protozoa can affect the eye?

A. Entamoeba histolytica
B. Toxoplasmosis (Correct Answer)
C. Giardia lamblia
D. Escherichia coli

Explanation: **Explanation:** **Toxoplasmosis** (caused by *Toxoplasma gondii*) is the most common cause of posterior uveitis worldwide. It is an obligate intracellular protozoan that has a predilection for the retina. The hallmark clinical feature is **focal necrotizing retinochoroiditis**, often described as a "headlight in the fog" appearance due to an active yellowish-white lesion seen through overlying vitreous haze. It can be congenital (classic triad: chorioretinitis, hydrocephalus, and intracranial calcifications) or acquired. **Analysis of Incorrect Options:** * **Entamoeba histolytica:** Primarily causes amoebic dysentery and liver abscesses. While it is a protozoan, it does not typically manifest with ocular involvement. * **Giardia lamblia:** A protozoan causing diarrheal illness (Giardiasis). It is not associated with direct ocular infection. * **Escherichia coli:** This is a **gram-negative bacterium**, not a protozoan. While it can cause endophthalmitis (rarely, following sepsis), it does not fit the biological classification requested in the question. **High-Yield Clinical Pearls for NEET-PG:** * **Acanthamoeba:** Another high-yield protozoan to remember; it causes a painful, ring-shaped corneal ulcer (keratitis) in contact lens users. * **Treatment for Toxoplasmosis:** The "Triple Therapy" includes Pyrimethamine, Sulfadiazine, and systemic steroids (steroids are only started *after* 48 hours of antimicrobial cover). * **Leishmaniasis:** A protozoan that can rarely cause eyelid lesions (Oriental sore) or interstitial keratitis.

Question 295: Which is the least commonly involved nerve in herpes zoster ophthalmicus?

A. Facial nerve (Correct Answer)
B. Frontal nerve
C. Lacrimal nerve
D. Nasociliary nerve

Explanation: **Explanation:** **1. Why Facial Nerve is the Correct Answer:** Herpes Zoster Ophthalmicus (HZO) is caused by the reactivation of the Varicella-Zoster Virus (VZV) latent in the **Trigeminal (V) ganglion**. The virus typically involves the **Ophthalmic division (V1)** of the trigeminal nerve. The Facial nerve (CN VII) is a motor nerve to the muscles of facial expression and is not a branch of the trigeminal nerve. While CN VII can be involved in Ramsay Hunt Syndrome (Geniculate ganglion involvement), it is **not** a primary or common component of HZO. **2. Analysis of Incorrect Options (Branches of V1):** The Ophthalmic nerve (V1) divides into three main branches, all of which are commonly involved in HZO: * **Frontal Nerve:** The most frequently involved branch. It divides into the supraorbital and supratrochlear nerves, supplying the forehead and upper eyelid. * **Lacrimal Nerve:** Supplies the lacrimal gland and the lateral aspect of the upper eyelid. * **Nasociliary Nerve:** A critical branch because it supplies the eyeball (cornea, iris, ciliary body) via the long and short ciliary nerves. Involvement of this nerve is clinically signaled by **Hutchinson’s Sign** (vesicles on the tip or side of the nose). **3. High-Yield Clinical Pearls for NEET-PG:** * **Hutchinson’s Sign:** Vesicles on the tip of the nose indicate nasociliary nerve involvement and carry a high risk (76%) of intraocular inflammation (keratitis/uveitis). * **Most common complication:** Post-herpetic neuralgia. * **Most common ocular finding:** Epithelial keratitis (pseudodendrites—unlike true dendrites of HSV, these lack terminal bulbs and stain poorly with fluorescein). * **Treatment:** Oral Acyclovir (800 mg 5 times daily for 7–10 days), ideally started within 72 hours of rash onset.

Question 296: Granulomatous uveitis with involvement of the parotid gland is seen in which condition?

A. Tuberculosis
B. Syphilis
C. Mumps
D. Sarcoidosis (Correct Answer)

Explanation: **Explanation:** The correct answer is **Sarcoidosis**. The clinical triad of granulomatous uveitis, parotid gland enlargement, and facial nerve palsy is known as **Heerfordt’s syndrome** (also called Uveoparotid fever), which is a specific manifestation of sarcoidosis. **Why Sarcoidosis is Correct:** Sarcoidosis is a multisystemic disorder characterized by non-caseating granulomas. Ocular involvement occurs in approximately 25–50% of cases, most commonly presenting as **bilateral granulomatous uveitis** (marked by "mutton-fat" keratic precipitates and Busacca/Koeppe nodules). The involvement of the parotid gland is a classic systemic association, often presenting as painless bilateral swelling. **Analysis of Incorrect Options:** * **Tuberculosis:** While it causes granulomatous uveitis, it typically presents with caseating necrosis and does not classically involve the parotid gland. * **Syphilis:** Known as the "Great Mimicker," it can cause granulomatous uveitis, but parotid involvement is not a characteristic feature. * **Mumps:** This is a common cause of viral parotitis, but the associated ocular finding is typically a non-granulomatous **acute follicular conjunctivitis** or dacryoadenitis, not granulomatous uveitis. **NEET-PG High-Yield Pearls:** * **Heerfordt’s Syndrome:** Uveitis + Parotitis + Fever + VII Nerve (Facial) Palsy. * **Lofgren’s Syndrome:** Erythema nodosum + Bilateral hilar lymphadenopathy + Arthralgia (another sarcoidosis variant). * **Investigation of Choice:** Serum ACE levels (elevated) and Chest X-ray (showing bilateral hilar lymphadenopathy). * **Definitive Diagnosis:** Biopsy showing non-caseating granulomas.

Question 297: Hard exudates are not seen in which of the following conditions?

A. Hypertension
B. Diabetes Mellitus
C. Toxemia of pregnancy (Correct Answer)
D. None of the above

Explanation: **Explanation:** Hard exudates are extracellular deposits of lipids and serum proteins in the outer plexiform layer of the retina. They result from **chronic vascular leakage** due to a breakdown of the blood-retinal barrier. **Why Toxemia of Pregnancy is the Correct Answer:** In **Toxemia of Pregnancy (Preeclampsia/Eclampsia)**, the primary pathology is acute, intense arteriolar spasm. The retinal findings typically include generalized or focal arteriolar narrowing, retinal edema, and in severe cases, exudative retinal detachment. Because the condition is **acute**, there is usually insufficient time for the chronic process of lipid deposition required to form hard exudates. **Analysis of Incorrect Options:** * **Diabetes Mellitus:** This is the most common cause of hard exudates. Microaneurysms and damaged capillaries leak fluid and lipids chronically, often forming a "circinate" pattern around the site of leakage. * **Hypertension:** Chronic hypertensive retinopathy (Grade 3 and 4) involves significant vascular permeability changes. Hard exudates are a hallmark feature, often accumulating in the Henle’s layer of the macula to form a **"Macular Star."** **High-Yield Clinical Pearls for NEET-PG:** * **Hard Exudates:** Located in the **Outer Plexiform Layer**; composed of lipoproteins; indicate chronic leakage. * **Soft Exudates (Cotton Wool Spots):** Located in the **Nerve Fiber Layer**; represent micro-infarctions (ischemia); seen in both Hypertension and Diabetes. * **Macular Star:** Differential diagnosis includes Hypertensive retinopathy, Neuroretinitis (Cat-scratch disease), and Papilledema. * **Elschnig Spots:** Small black spots surrounded by yellow halos seen in hypertensive choroidopathy (advanced toxemia/hypertension).

Question 298: Which of the following is characteristic of dysthyroid eye disease of Type-1 orbitopathy?

A. Symmetric, mild proptosis and lid retraction (Correct Answer)
B. Asymmetric, proptosis and lid lag
C. Conjunctival congestion and lid edema
D. Chemosis, lid edema and lagophthalmos

Explanation: **Explanation:** Dysthyroid Eye Disease (Thyroid-Associated Ophthalmopathy) is traditionally classified into two distinct clinical types based on the underlying pathophysiology: **1. Why Option A is Correct:** **Type-1 Orbitopathy** (Lipogenic variant) is characterized by an increase in **orbital fat volume** with minimal involvement of the extraocular muscles. Clinically, this manifests as **symmetric, mild proptosis** and **lid retraction**. It typically occurs in younger patients (females) and follows a relatively benign, non-inflammatory course with a lower risk of restrictive myopathy or optic nerve compression. **2. Why the other options are incorrect:** * **Options B, C, and D:** These features are characteristic of **Type-2 Orbitopathy** (Myogenic/Congestive variant). This type involves significant **extraocular muscle enlargement** and inflammatory cellular infiltration. It presents with **asymmetric proptosis**, marked **conjunctival congestion**, **chemosis**, and **lid edema**. Because the muscles are fibrotic and stiff, patients frequently experience **lid lag**, restrictive squint (diplopia), and are at a higher risk for **lagophthalmos** and dysthyroid optic neuropathy. **Clinical Pearls for NEET-PG:** * **Most common cause** of both unilateral and bilateral proptosis in adults is Graves' Disease. * **Dalrymple Sign:** Resting lid retraction (widened palpebral fissure). * **Von Graefe’s Sign:** Retardation of the upper lid on downward gaze (lid lag). * **Muscle Involvement Sequence (Mnemonic: IM SLOW):** **I**nferior Rectus (most common) > **M**edial Rectus > **S**uperior Rectus > **L**ateral Rectus. * **Smoking** is the most significant modifiable risk factor for the progression of orbitopathy.

Question 299: Which of the following is true regarding heterochromic cyclitis?

A. 60% of patients develop glaucoma.
B. Show a good response when treated with steroids.
C. Lens implantation following cataract surgery is contraindicated.
D. Hyphaema during cataract surgery is due to iris neovascularization. (Correct Answer)

Explanation: **Fuchs’ Heterochromic Iridocyclitis (FHI)** is a chronic, typically unilateral, low-grade uveitis characterized by a classic triad of heterochromia, cyclitis, and cataract. ### **Explanation of the Correct Option** **Option D is correct:** During cataract surgery or anterior chamber paracentesis, patients with FHI often experience a filiform hemorrhage (Amsler’s sign) from the angle. This occurs due to the presence of **fragile, fine, radial neovascular vessels** on the iris and across the trabecular meshwork. These vessels lack a muscularis layer and bleed easily when the intraocular pressure drops suddenly during surgery. ### **Analysis of Incorrect Options** * **Option A:** While glaucoma is a common complication, it occurs in approximately **15–25%** of cases, not 60%. It is often resistant to medical therapy and may require surgery. * **Option B:** FHI shows a **poor response to topical steroids**. The "inflammation" (cells and flare) is chronic and does not lead to posterior synechiae; therefore, long-term steroid use is avoided to prevent steroid-induced glaucoma and accelerated cataract formation. * **Option C:** Lens implantation is **not contraindicated**. In fact, patients with FHI generally have excellent visual outcomes following phacoemulsification with posterior chamber IOL implantation, despite the chronic inflammation. ### **High-Yield Clinical Pearls for NEET-PG** * **Amsler’s Sign:** Pathognomonic filiform hemorrhage upon AC entry. * **Keratic Precipitates (KPs):** Characteristically **small, stellate, and non-pigmented**, distributed diffusely over the entire corneal endothelium (unlike the inferior Arlt’s triangle in typical uveitis). * **Heterochromia:** Usually, the affected eye is **hypochromic** (lighter). However, in patients with light-colored irides, the affected eye may appear darker due to atrophy of the iris stroma exposing the pigment epithelium. * **Absence of Synechiae:** A key diagnostic feature is the absence of posterior synechiae despite long-standing inflammation.

Question 300: All of the following cause visual loss in hypertension EXCEPT?

A. Occipital infarct (Correct Answer)
B. Anterior ischemic optic neuropathy
C. Papilledema
D. Hemorrhage

Explanation: **Explanation:** The question asks for the condition that is **NOT** a direct ocular manifestation of hypertension causing visual loss. **Why "Occipital Infarct" is the correct answer:** While hypertension is a major risk factor for stroke (including occipital lobe infarcts), an occipital infarct is a **neurological** complication rather than a direct **ocular** manifestation. In an occipital infarct, the eye itself and the optic nerve remain healthy; the visual loss (typically homonymous hemianopia) occurs due to damage in the visual cortex of the brain. Therefore, it is categorized as a central/cerebrovascular cause of vision loss, not a direct hypertensive eye disease. **Analysis of Incorrect Options:** * **Anterior Ischemic Optic Neuropathy (AION):** Hypertension causes arteriosclerosis of the short posterior ciliary arteries, leading to ischemia of the optic nerve head. This is a classic ocular complication of HTN. * **Papilledema:** Seen in Grade IV Hypertensive Retinopathy (Malignant Hypertension). Increased intracranial pressure or severe vascular leakage leads to bilateral optic disc swelling and significant vision loss. * **Hemorrhage:** Hypertension leads to retinal hemorrhages (flame-shaped), vitreous hemorrhage (secondary to neovascularization or macroaneurysms), and subretinal hemorrhages, all of which directly impair vision. **High-Yield Clinical Pearls for NEET-PG:** * **Keith-Wagener-Barker Classification:** Remember that **Grade IV** is defined by the presence of papilledema. * **Silver/Copper Wiring:** Caused by arteriosclerotic thickening of the vessel walls. * **A/V Nipping (Salus’s Sign):** A hallmark of hypertensive changes where thickened arteries compress veins at crossings. * **Cotton Wool Spots:** Represent microinfarcts of the retinal nerve fiber layer (RNFL).

Practice by Chapter

Diabetes Mellitus

Practice Questions

Hypertension

Practice Questions

Autoimmune Disorders

Practice Questions

Thyroid Disease

Practice Questions

HIV and AIDS

Practice Questions

Hematological Disorders

Practice Questions

Neurological Disorders

Practice Questions

Dermatological Conditions

Practice Questions

Pregnancy-Related Eye Changes

Practice Questions

Metabolic Disorders

Practice Questions

Ocular Toxicity of Systemic Medications

Practice Questions

Infectious Systemic Diseases

Practice Questions

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