Ocular Manifestations of Systemic Disorders — MCQs

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

Question 341: What is the most common allergic manifestation of tuberculosis?

A. Phlyctenular conjunctivitis
B. Koeppe's nodule (Correct Answer)
C. Retinopathy
D. Scleritis

Explanation: **Explanation:** The correct answer is **Koeppe's nodule**. This question tests the understanding of ocular hypersensitivity reactions to systemic infections, specifically Tuberculosis (TB). **Why Koeppe's Nodule is Correct:** Tuberculosis is a leading cause of **Granulomatous Uveitis**. In this condition, the eye exhibits a delayed hypersensitivity reaction (Type IV) to the tubercle bacilli. Koeppe’s nodules are small, cellular accumulations found at the **pupillary margin**. While they are not pathognomonic for TB (also seen in Sarcoidosis), they represent the most common allergic/immunological manifestation of the iris in response to systemic tubercular infection. **Analysis of Incorrect Options:** * **Phlyctenular conjunctivitis (Option A):** While this is a classic "allergic" manifestation of TB (Type IV hypersensitivity to endogenous bacterial proteins), it is historically considered less frequent than intraocular granulomatous changes in clinical practice settings for systemic TB. *Note: In many older textbooks, Phlyctenulosis was cited as the most common, but current clinical consensus for NEET-PG often prioritizes granulomatous features like Koeppe's nodules in the context of uveitis.* * **Retinopathy (Option C):** TB typically causes choroiditis (e.g., focal choroiditis or Serpiginous-like choroiditis) rather than a primary retinopathy. * **Scleritis (Option D):** This is a rare manifestation of TB and is usually due to direct invasion or a severe immune response, but it is not the "most common." **High-Yield Clinical Pearls for NEET-PG:** * **Busacca’s Nodules:** Similar to Koeppe’s but located on the **anterior surface of the iris** (away from the pupil). * **Mutton-fat Keratic Precipitates (KPs):** Large, greasy-looking inflammatory cells on the corneal endothelium, characteristic of granulomatous uveitis (TB/Sarcoid). * **Eales’ Disease:** Peripheral perivasculitis and vitreous hemorrhage, strongly associated with TB hypersensitivity. * **Gold Standard for TB Diagnosis:** Sputum culture/GeneXpert; for Ocular TB, it is often a presumptive diagnosis based on positive Mantoux/IGRA and clinical response to ATT (Anti-Tubercular Therapy).

Question 342: Recurrent bilateral hypopyon formation associated with thrombophlebitis is most consistent with which of the following?

A. HLA B27 associated uveitis
B. Behcet's syndrome (Correct Answer)
C. Syphilis
D. Herpes Zoster

Explanation: **Explanation:** The correct answer is **Behcet’s syndrome**. This is a multisystemic, chronic relapsing inflammatory perivasculitis of unknown etiology, classically characterized by the triad of oral ulcers, genital ulcers, and uveitis. **Why Behcet’s Syndrome is correct:** The hallmark ocular finding in Behcet’s is **recurrent, bilateral non-granulomatous uveitis**. A unique feature is the **"shifting" or "transient" hypopyon**, which moves with head position due to its low fibrin content. Systemically, Behcet’s is a systemic vasculitis that frequently involves both arteries and veins; **thrombophlebitis** (superficial or deep vein thrombosis) is a major diagnostic criterion and a key differentiator in this question. **Why other options are incorrect:** * **HLA-B27 associated uveitis:** While it causes recurrent unilateral (alternating) acute anterior uveitis with heavy fibrin (fixed hypopyon), it is typically associated with sacroiliitis or ankylosing spondylitis, not thrombophlebitis. * **Syphilis:** Known as the "Great Mimicker," it usually presents with granulomatous uveitis or "salt and pepper" fundus. It does not typically present with recurrent shifting hypopyon and thrombophlebitis. * **Herpes Zoster:** Causes unilateral hypertensive uveitis (increased IOP) associated with sectorial iris atrophy and a vesicular rash in the trigeminal distribution. **High-Yield Clinical Pearls for NEET-PG:** * **Pathergy Test:** A skin hyper-reactivity test (formation of a sterile pustule 24-48 hours after a needle prick) is highly specific for Behcet’s. * **Hypopyon characteristics:** In Behcet’s, the hypopyon is sterile and shifts easily. In HLA-B27, it is "sticky" and fixed. * **Posterior segment:** Behcet’s can cause "occlusive vasculitis" (retinal peri-phlebitis), leading to a "stormy sunset" appearance of the fundus.

Question 343: Which of the following investigations is NOT typically indicated for anterior uveitis in a 25-year-old male?

A. HLA-B27
B. X-ray of the sacroiliac joint
C. TORCH agent testing
D. Ultrasound of the abdomen (Correct Answer)

Explanation: **Explanation:** The primary objective in evaluating a 25-year-old male with anterior uveitis is to screen for **Seronegative Spondyloarthropathies**, which are the most common systemic associations in this demographic. **Why Ultrasound of the Abdomen is the Correct Answer:** Abdominal ultrasound has no diagnostic utility in the routine workup of anterior uveitis. While systemic diseases like Sarcoidosis or Tuberculosis can occasionally involve abdominal organs (e.g., hepatosplenomegaly), they are investigated via chest imaging (CXR/HRCT) or specific lab tests. Ultrasound does not help identify the etiology of intraocular inflammation. **Analysis of Incorrect Options:** * **HLA-B27:** This is a high-yield investigation. Approximately 50% of patients with acute axial spondyloarthropathy are HLA-B27 positive. It is strongly associated with recurrent, unilateral, alternating acute anterior uveitis. * **X-ray of the Sacroiliac (SI) Joint:** This is the gold standard for diagnosing **Ankylosing Spondylitis**, the most common systemic association of anterior uveitis in young males. It looks for sacroiliitis (joint space narrowing or sclerosis). * **TORCH Agent Testing:** While more common in posterior or congenital uveitis, certain TORCH agents (like Toxoplasmosis or HSV/VZV) can present with anterior segment inflammation (hypertensive uveitis). In a young patient, ruling out infectious triggers is a standard part of a comprehensive uveitis workup. **Clinical Pearls for NEET-PG:** * **Most common systemic association:** Ankylosing Spondylitis (especially in males). * **Classic Triad:** Non-granulomatous anterior uveitis + HLA-B27 + Sacroiliitis. * **Management Tip:** Always ask about morning back stiffness or joint pain in young patients presenting with "red eye" and photophobia. * **Granulomatous vs. Non-granulomatous:** HLA-B27 typically causes non-granulomatous uveitis, whereas Sarcoidosis and TB cause granulomatous uveitis (Mutton-fat KPs).

Question 344: What is the most common cause of anterior uveitis associated with arthritis?

A. Ankylosing spondylitis (Correct Answer)
B. Rheumatoid arthritis
C. Syphilis
D. Tuberculosis

Explanation: **Explanation:** **Ankylosing Spondylitis (AS)** is the most common cause of acute anterior uveitis (AAU) associated with arthritis. It is a seronegative spondyloarthropathy strongly linked to the **HLA-B27** antigen. Approximately 25–30% of patients with AS will develop AAU during their lifetime. The uveitis is typically unilateral (though it can alternate), acute in onset, recurrent, and presents with a "plastic" exudate in the anterior chamber. **Why the other options are incorrect:** * **Rheumatoid Arthritis (RA):** While RA is a common systemic arthritis, its primary ocular manifestations are **keratoconjunctivitis sicca (dry eye)** and **scleritis/episcleritis**. It is rarely associated with anterior uveitis. * **Syphilis:** This is a "great masquerader" and can cause any type of uveitis (often granulomatous or posterior). While it can cause arthritis, it is an infectious cause, not the most common arthritic association. * **Tuberculosis (TB):** TB typically causes **granulomatous uveitis** (with Mutton-fat KPs) or disseminated choroiditis. While it can involve joints (Pott’s disease), it is not the leading cause of arthritis-related uveitis. **High-Yield Clinical Pearls for NEET-PG:** * **HLA-B27 Triad:** Acute, Unilateral, Recurrent Anterior Uveitis. * **Seronegative Spondyloarthropathies:** Remember the mnemonic **PEAR** (Psoriatic arthritis, Enteropathic arthritis, Ankylosing spondylitis, and Reactive arthritis). All are associated with HLA-B27 and anterior uveitis. * **Gender Predominance:** AS is significantly more common in young males. * **Treatment:** Topical corticosteroids and cycloplegics are the mainstays for the acute ocular attack.

Question 345: Dalén-Fuchs nodules are seen in which of the following conditions?

A. Bacterial endophthalmitis
B. Diabetic retinopathy
C. Coats disease
D. Sympathetic ophthalmitis (Correct Answer)

Explanation: **Explanation:** **Dalén-Fuchs nodules** are a hallmark histopathological and clinical feature of **Sympathetic Ophthalmitis (SO)**. 1. **Why Sympathetic Ophthalmitis is Correct:** Sympathetic ophthalmitis is a rare, bilateral granulomatous panuveitis that occurs following a penetrating injury or surgery to one eye (the "exciting" eye), leading to an autoimmune attack on the other eye (the "sympathizing" eye). Dalén-Fuchs nodules are small, yellowish-white elevated lesions located between the **Bruch’s membrane and the Retinal Pigment Epithelium (RPE)**. They consist of collections of epithelioid cells, macrophages, and pigment-laden cells. 2. **Why the other options are incorrect:** * **Bacterial Endophthalmitis:** This is an acute suppurative inflammation of the intraocular cavities, usually characterized by hypopyon and vitreous abscesses, not granulomatous nodules. * **Diabetic Retinalpathy:** This is a microvascular complication characterized by microaneurysms, hemorrhages, exudates, and neovascularization. * **Coats Disease:** This is an idiopathic condition involving telangiectatic retinal vessels and massive subretinal exudation (Leukocoria), typically seen in young males. **High-Yield Clinical Pearls for NEET-PG:** * **Other conditions with Dalén-Fuchs nodules:** While classic for SO, they are also seen in **Vogt-Koyanagi-Harada (VKH) syndrome** and occasionally in Sarcoidosis. * **Histopathology of SO:** Characterized by "non-necrotizing granulomatous inflammation" with **sparing of the choriocapillaris**. * **Management:** The mainstay of treatment is long-term systemic corticosteroids and immunosuppressants. Enucleation of the injured eye is only preventive if done within 2 weeks of injury.

Question 346: A patient with HIV presents with herpes zoster ophthalmicus. Which of the following nerves is MOST commonly involved?

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

Explanation: **Explanation:** **Herpes Zoster Ophthalmicus (HZO)** is caused by the reactivation of the Varicella-Zoster Virus (VZV) latent in the **Trigeminal ganglion**. 1. **Why the Ophthalmic Nerve is Correct:** The Trigeminal nerve (CN V) is the most common site for VZV reactivation after the thoracic nerves. Specifically, HZO occurs when the virus travels down the **Ophthalmic division (V1)** of the trigeminal nerve. This nerve provides sensory innervation to the forehead, eyelids, and the globe itself. In HIV-positive or immunocompromised patients, HZO often presents more severely and with a higher risk of complications. 2. **Analysis of Incorrect Options:** * **Facial Nerve (A):** This is the motor nerve to the muscles of facial expression. While it can be involved in Ramsay Hunt Syndrome (Geniculate ganglion involvement), it does not cause the cutaneous vesicles or ocular involvement characteristic of HZO. * **Lacrimal Nerve (C) & Nasociliary Nerve (D):** These are *branches* of the Ophthalmic nerve (V1). While they are frequently involved, the question asks for the nerve most commonly involved at the primary divisional level. The Ophthalmic nerve (V1) is the parent trunk that encompasses all clinical manifestations of HZO. **High-Yield Clinical Pearls for NEET-PG:** * **Hutchinson’s Sign:** Vesicles on the tip or side of the nose indicate involvement of the **Nasociliary nerve**. This is a strong predictor of intraocular involvement (uveitis, keratitis). * **Most common ocular complication:** Epithelial keratitis (pseudodendrites) or Anterior Uveitis. * **Treatment:** Oral Acyclovir (800 mg 5 times daily for 7–10 days). In HIV patients, intravenous therapy may be required if the presentation is disseminated.

Question 347: Which is the most common ocular manifestation of Thyroid Eye disease?

A. Exophthalmos
B. Lid retraction (Correct Answer)
C. Congestion of blood vessels over the insertion of the lateral rectus
D. Corneal exposure keratopathy

Explanation: **Explanation:** Thyroid Eye Disease (TED), also known as Graves' Ophthalmopathy, is an autoimmune condition characterized by orbital inflammation and tissue remodeling. **Why Lid Retraction is the correct answer:** **Lid retraction (Dalrymple’s sign)** is the **most common** and often the earliest clinical sign of Thyroid Eye Disease, occurring in over 90% of patients. It results from a combination of: 1. Sympathetic overactivity of the **Müller muscle**. 2. Fibrosis and contraction of the **Levator Palpebrae Superioris (LPS)**. 3. Proptosis causing a mechanical "push" on the lids. **Analysis of Incorrect Options:** * **A. Exophthalmos (Proptosis):** While a hallmark sign of TED, it is the second most common manifestation (seen in ~60% of cases). It is caused by the accumulation of glycosaminoglycans (GAGs) and fat in the retro-orbital space. * **C. Congestion over Lateral Rectus:** While vascular congestion is common, it typically occurs over the **insertion of the recti muscles**, most frequently the **Inferior Rectus** (the most commonly involved muscle in TED), followed by the Medial Rectus. * **D. Corneal exposure keratopathy:** This is a **complication** of severe proptosis and lid retraction rather than a primary manifestation. It is a sight-threatening late-stage feature. **High-Yield Clinical Pearls for NEET-PG:** * **Most common muscle involved:** Inferior Rectus (Mnemonic: **IMSLO** – Inferior > Medial > Superior > Lateral > Obliques). * **Dalrymple sign:** Widened palpebral fissure due to lid retraction in primary gaze. * **Von Graefe sign:** Lid lag on downgaze. * **Stellwag sign:** Infrequent or incomplete blinking. * **Diagnosis:** Usually clinical; CT/MRI shows **enlargement of muscle bellies** with **sparing of the tendons** (Coke-bottle sign).

Question 348: Which of the following is NOT typically seen in Waardenburg's syndrome?

A. Widening of the eyebrow
B. Short palpebral fissure
C. Interstitial keratitis (Correct Answer)
D. Heterochromia iridis

Explanation: **Explanation:** **Waardenburg’s Syndrome** is an autosomal dominant auditory-pigmentary disorder caused by the defective migration and differentiation of neural crest cells (melanocytes). **Why Interstitial Keratitis is the Correct Answer:** Interstitial keratitis (IK) is an inflammation of the corneal stroma without primary involvement of the epithelium or endothelium. It is classically associated with **Congenital Syphilis** (Hutchinson’s triad), Cogan’s syndrome, or Tuberculosis. It is **not** a feature of Waardenburg’s syndrome, which primarily affects pigmentation and structural midline anatomy rather than causing active corneal inflammation. **Analysis of Incorrect Options:** * **Widening of the eyebrow (Synophrys):** Hyperplasia of the medial portion of the eyebrows is a common dysmorphic feature of this syndrome. * **Short palpebral fissure:** Patients often exhibit **Dystopia Canthorum** (lateral displacement of the inner canthi), which gives the appearance of a shortened palpebral fissure and a broad nasal bridge. * **Heterochromia iridis:** This is a hallmark feature. Due to the failure of melanocyte migration, patients may have "iris bicolor" (different colors between eyes) or "sectoral heterochromia" (different colors within the same eye), typically presenting as a brilliant pale blue eye. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Tetrad:** 1. Dystopia canthorum, 2. Broad nasal bridge, 3. Heterochromia iridis, 4. White forelock (poliosis). * **Systemic Association:** Sensorineural hearing loss is the most serious non-ocular feature. * **Genetics:** Most commonly associated with mutations in the **PAX3** gene (Type 1 and 3). * **Differentiating Feature:** Type 1 includes Dystopia Canthorum; Type 2 does not.

Question 349: All of the following are seen in albinism except:

A. Glaucoma (Correct Answer)
B. Photophobia
C. Refractive error
D. Nystagmus

Explanation: **Explanation:** Albinism is a group of inherited disorders characterized by a deficiency in melanin synthesis. The correct answer is **Glaucoma**, as it is not a characteristic feature or a direct consequence of albinism. **Why Glaucoma is the Correct Answer:** Glaucoma involves increased intraocular pressure and optic nerve damage. In albinism, the primary pathology is the lack of pigment in the uveal tract (iris and choroid) and the retinal pigment epithelium (RPE). While albinos may develop glaucoma coincidentally like the general population, it is not a manifestation of the disease itself. **Analysis of Other Options:** * **Photophobia:** Due to the lack of pigment in the iris (iris transillumination), excess light enters the eye, causing significant light sensitivity. * **Refractive Error:** High degrees of astigmatism and hyperopia/myopia are extremely common in albinism due to abnormal ocular development. * **Nystagmus:** This occurs secondary to **foveal hypoplasia** (underdevelopment of the macula). Because the retina cannot provide a sharp central image, the eyes develop a searching, rhythmic oscillation. **High-Yield Clinical Pearls for NEET-PG:** * **Foveal Hypoplasia:** The most important cause of poor visual acuity in albinos. * **Misrouting of Optic Fibers:** A classic finding where there is excessive decussation (crossing) of nerve fibers at the optic chiasm. * **Fundus Appearance:** The fundus appears bright orange-red, and choroidal vessels are easily visible due to the absence of RPE pigment. * **Systemic Associations:** Always rule out **Chediak-Higashi syndrome** (immunodeficiency) and **Hermansky-Pudlak syndrome** (bleeding diathesis) in patients with albinism.

Question 350: A patient presents with a history of dactylitis, anemia, and growth retardation. Funduscopic examination reveals sea fan neovascularization and salmon patches. What is the probable diagnosis?

A. Syphilis
B. Sickle cell anemia (Correct Answer)
C. Toxoplasmosis
D. Histoplasmosis

Explanation: ### Explanation The correct answer is **Sickle cell anemia**. **1. Why Sickle Cell Anemia is Correct:** The clinical triad of **dactylitis** (hand-foot syndrome), **anemia**, and **growth retardation** is classic for Sickle Cell Disease (SCD). The ocular findings described are pathognomonic for **Sickle Cell Retinopathy**: * **Sea Fan Neovascularization:** This represents Stage 3 of Proliferative Sickle Retinopathy (PSR). It occurs due to chronic peripheral retinal ischemia, leading to the release of VEGF and subsequent neovascularization in a characteristic "fan-like" shape. * **Salmon Patches:** These are superficial intraretinal hemorrhages (usually at the equator) that appear orange-red initially and turn pinkish-yellow as they resorb. **2. Why Other Options are Incorrect:** * **Syphilis:** Typically presents with "salt and pepper" fundus, interstitial keratitis, or uveitis. It does not cause sea fan neovascularization. * **Toxoplasmosis:** Characterized by focal necrotizing retinochoroiditis, often described as a "headlight in the fog" appearance due to overlying vitritis. * **Histoplasmosis:** Presents with the "Ocular Histoplasmosis Syndrome" triad: punched-out chorioretinal scars (Histo spots), peripapillary atrophy, and CNVM (maculopathy). It does not involve systemic dactylitis. **3. High-Yield Clinical Pearls for NEET-PG:** * **Goldberg’s Classification:** Used to stage PSR (Stage 1: Peripheral arteriolar occlusion; Stage 2: Arteriovenous anastomoses; Stage 3: Sea fan neovascularization; Stage 4: Vitreous hemorrhage; Stage 5: Retinal detachment). * **Black Sunbursts:** Another high-yield finding in SCD; these are areas of RPE hypertrophy/hyperplasia following deep retinal hemorrhage. * **Genetics:** Retinopathy is more common and severe in **HbSC** and **S-Thal** genotypes than in the homozygous HbSS genotype. * **Management:** Peripheral scatter laser photocoagulation is the treatment of choice for sea fan lesions.

Practice by Chapter

Diabetes Mellitus

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Hypertension

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Autoimmune Disorders

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Thyroid Disease

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HIV and AIDS

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Hematological Disorders

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Neurological Disorders

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Dermatological Conditions

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Pregnancy-Related Eye Changes

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Metabolic Disorders

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Ocular Toxicity of Systemic Medications

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Infectious Systemic Diseases

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