Ocular Manifestations of Systemic Disorders — MCQs

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

Question 91: Bitot's spots are seen in which deficiency?

A. Vitamin D deficiency
B. Vitamin A deficiency (Correct Answer)
C. Vitamin E deficiency
D. Vitamin B6 deficiency

Explanation: **Explanation:** **Bitot’s spots** are a hallmark clinical sign of **Vitamin A deficiency (VAD)**. They are characterized by triangular, foamy, silvery-white patches typically located on the bulbar conjunctiva, most commonly on the temporal side. These spots represent areas of **squamous metaplasia** and keratinization of the conjunctival epithelium. The "foamy" appearance is caused by the accumulation of keratin debris and gas-producing bacilli (*Corynebacterium xerosis*). **Why the other options are incorrect:** * **Vitamin D deficiency:** Primarily affects bone metabolism, leading to Rickets in children and Osteomalacia in adults. Ocular manifestations are rare but may include zonular cataracts or hypocalcemic tetany-related changes. * **Vitamin E deficiency:** A potent antioxidant; deficiency can lead to spinocerebellar ataxia and peripheral neuropathy. In the eye, it may contribute to pigmentary retinopathy or ophthalmoplegia. * **Vitamin B6 (Pyridoxine) deficiency:** Generally presents with dermatological (seborrheic dermatitis) and neurological (peripheral neuropathy, seizures) symptoms, not specific conjunctival lesions. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Classification of Xerophthalmia:** Bitot’s spots are classified as **Stage X1B**. * **Earliest Symptom:** Night blindness (Nyctalopia) - Stage XN. * **Earliest Sign:** Conjunctival xerosis - Stage X1A. * **Reversibility:** Bitot’s spots are generally reversible with high-dose Vitamin A supplementation. * **Keratomalacia (X3):** This is a medical emergency involving liquefactive necrosis of the cornea, which can lead to perforation.

Question 92: Lisch nodule is seen in which of the following conditions?

A. Von Recklinghausen's disease (Correct Answer)
B. Lupus vulgaris
C. Leprosy
D. Lymphogranuloma venereum

Explanation: **Explanation:** **Lisch nodules** are the most common ocular manifestation of **Neurofibromatosis Type 1 (NF1)**, also known as **Von Recklinghausen’s disease**. Pathologically, these are melanocytic hamartomas of the iris stroma. They appear as well-defined, dome-shaped, clear-to-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 NF1 patients), making them a key diagnostic criterion. **Analysis of Incorrect Options:** * **Lupus vulgaris:** This is a chronic progressive form of cutaneous tuberculosis. Ocular involvement is rare but may include conjunctivitis or eyelid lesions, not iris nodules. * **Leprosy (Hansen’s Disease):** Ocular features include madarosis (loss of lashes), lagophthalmos, and chronic granulomatous uveitis. While "pearls" can be seen on the iris (iris pearls), they are distinct from Lisch nodules. * **Lymphogranuloma venereum (LGV):** Caused by *Chlamydia trachomatis*, it typically presents with Parinaud oculoglandular syndrome (conjunctivitis with lymphadenopathy), not intraocular hamartomas. **Clinical Pearls for NEET-PG:** * **Diagnostic Criteria:** Lisch nodules are part of the NIH diagnostic criteria for NF1 (2 or more nodules required). * **NF1 vs. NF2:** Lisch nodules are characteristic of **NF1**. In contrast, **NF2** is associated with **Presenile Posterior Subcapsular Cataracts** (PSC). * **Differential Diagnosis:** Do not confuse Lisch nodules with **Koeppe or Bussaca nodules**, which are inflammatory nodules seen in granulomatous uveitis (e.g., Sarcoidosis). * **Optic Nerve:** NF1 is also strongly associated with **Optic Nerve Gliomas**.

Question 93: Which of the following is NOT a cause of panuveitis?

A. Behcet's syndrome
B. Syphilis (Correct Answer)
C. Sarcoidosis
D. Sympathetic ophthalmitis

Explanation: **Explanation:** The correct answer is **Syphilis (Option B)**. In the context of standard ophthalmology classification for exams like NEET-PG, Syphilis is traditionally categorized as a **multifocal chorioretinitis** or a "great masquerader" that can present as anterior, intermediate, or posterior uveitis. While it can involve the entire uveal tract, it is classically distinguished from the "Big Four" causes of true **Panuveitis**. **Why the other options are incorrect:** Panuveitis refers to generalized inflammation of the entire uveal tract (iris, ciliary body, and choroid). The classic causes include: * **Behcet’s Syndrome:** A leading cause of panuveitis characterized by "cold" hypopyon and occlusive vasculitis. * **Sarcoidosis:** A granulomatous disease that frequently causes panuveitis with "mutton-fat" keratic precipitates and "string of pearls" vitreous opacities. * **Sympathetic Ophthalmitis:** A bilateral granulomatous panuveitis following penetrating ocular trauma or surgery to one eye. * **Vogt-Koyanagi-Harada (VKH) Syndrome:** Another high-yield cause of bilateral panuveitis associated with exudative retinal detachment and integumentary signs. **High-Yield Clinical Pearls for NEET-PG:** 1. **The "Big Four" of Panuveitis:** Behcet’s, Sarcoidosis, Sympathetic Ophthalmitis, and VKH Syndrome. 2. **Behcet’s Triad:** Recurrent oral ulcers, genital ulcers, and iridocyclitis with hypopyon. 3. **Sympathetic Ophthalmitis:** The injured eye is the "exciting eye," and the fellow eye is the "sympathizing eye." Dalen-Fuchs nodules are a hallmark histopathological finding. 4. **Syphilis:** Always rule out Syphilis in any atypical uveitis; it is the most common cause of "Salt and Pepper" fundus in adults.

Question 94: A 2-year-old unimmunized child from a hilly tribal area developed Keratomalacia after a viral infection. Which of the following viral infections could have led to the development of Keratomalacia?

A. Rubella
B. Rubeola (Correct Answer)
C. Mumps
D. Varicella

Explanation: **Explanation:** **Correct Answer: B. Rubeola (Measles)** The correct answer is **Rubeola**, commonly known as Measles. In developing countries and underserved areas, Measles is a leading cause of childhood blindness. The underlying medical concept involves a "triple threat" to the cornea: 1. **Vitamin A Depletion:** The measles virus causes a massive systemic inflammatory response that rapidly depletes the body’s Vitamin A stores. 2. **Epithelial Damage:** The virus directly infects the conjunctival and corneal epithelium, causing keratitis. 3. **Secondary Infection:** Measles induces transient immunosuppression, predisposing the child to secondary bacterial or fungal corneal ulcers, which rapidly progress to **Keratomalacia** (liquefactive necrosis of the cornea). **Analysis of Incorrect Options:** * **A. Rubella:** Primarily associated with "Congenital Rubella Syndrome," presenting with cataracts, glaucoma, and "salt and pepper" retinopathy, rather than acute keratomalacia. * **C. Mumps:** Ocular involvement is rare but typically manifests as dacryoadenitis (inflammation of the lacrimal gland) or optic neuritis. * **D. Varicella:** Can cause dendritic keratitis or uveitis, but it does not typically lead to the rapid corneal melting seen in Vitamin A-deficient children post-measles. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Protocol:** All children diagnosed with Measles in endemic areas should receive two doses of **Vitamin A** (200,000 IU for >1 year; 100,000 IU for 6–12 months) to prevent blindness and reduce mortality. * **Bitot’s Spots:** Triangular, foamy patches on the bulbar conjunctiva; a hallmark of Vitamin A deficiency. * **Xerophthalmia Classification:** Keratomalacia involving >1/3 of the cornea is classified as **X3B**.

Question 95: Clinical manifestations of chalcosis include all of the following except?

A. Kayser-Fleischer ring
B. Sunflower cataract
C. Greenish discoloration of iris (Correct Answer)
D. Deposition of golden plaque at the posterior pole of the retina

Explanation: **Explanation** **Chalcosis** refers to the intraocular deposition of copper following a penetrating injury with a copper-containing foreign body. The clinical features depend on the copper content: pure copper (>85%) causes acute suppurative endophthalmitis, while alloys with lower copper content result in chronic chalcosis. **Why Option C is the correct answer:** In chalcosis, the iris typically undergoes a **muddy discoloration** or becomes greenish-brown, but it does **not** specifically present as a distinct "greenish discoloration" in the same way it affects other structures. More importantly, the other three options are classic, textbook descriptions of copper deposition. In many exams, this is a "best fit" question where the other signs are more pathognomonic. **Analysis of Incorrect Options:** * **A. Kayser-Fleischer (KF) ring:** This is a golden-brown or greenish-yellow ring due to copper deposition in the **Descemet’s membrane** at the limbus. While famous in Wilson’s disease, it also occurs in ocular chalcosis. * **B. Sunflower cataract:** Copper deposits in the **anterior lens capsule** (subcapsular) in a stellate pattern, resembling a sunflower. * **D. Golden plaque at the posterior pole:** Fine, shimmering copper particles (metallic sheen) deposit on the internal limiting membrane of the retina, often concentrating at the macula/posterior pole. **High-Yield Clinical Pearls for NEET-PG:** * **Siderosis Bulbi:** Iron deposition (from an iron FB) typically causes **Heterochromia Iridis** (the affected iris becomes darker/brownish) and "Rusty" cataract. * **KF Ring Location:** Always starts at the 12 o'clock position, then 6 o'clock, then fills in laterally. * **Electroretinogram (ERG):** In chalcosis, the ERG is usually preserved initially, whereas in Siderosis, there is a progressive decrease in b-wave amplitude, eventually leading to a flat ERG.

Question 96: What is the most frequent bacterial agent causing nongranulomatous uveitis?

A. Staphylococcus
B. Streptococcus (Correct Answer)
C. Pneumococcus
D. Influenza bacillus

Explanation: **Explanation:** **Nongranulomatous uveitis** is typically characterized by an acute onset, fine keratic precipitates (KPs), and a diffuse inflammatory reaction in the anterior chamber. While many cases are idiopathic or associated with HLA-B27 related systemic conditions, those triggered by bacterial infections are most commonly linked to **Streptococcus**. **Why Streptococcus is Correct:** Streptococcal infections (particularly from the upper respiratory tract, teeth, or tonsils) are the most frequent bacterial triggers for hypersensitivity-mediated nongranulomatous uveitis. The pathogenesis often involves a Type III or Type IV hypersensitivity reaction to bacterial antigens rather than a direct intraocular invasion. Historically and clinically, *Streptococcus viridans* and *Streptococcus pneumoniae* are the most cited organisms in this category. **Analysis of Incorrect Options:** * **Staphylococcus:** While a common cause of endophthalmitis and blepharoconjunctivitis, it is less frequently implicated as a primary trigger for sterile, hypersensitivity-induced nongranulomatous uveitis compared to Streptococcus. * **Pneumococcus:** Although a species of Streptococcus (*S. pneumoniae*), it is a specific subset. In the context of general "bacterial agents," the broader category of Streptococcus is the preferred answer in standard ophthalmic teaching. * **Influenza bacillus (*H. influenzae*):** This is a common cause of pediatric conjunctivitis and orbital cellulitis but is a rare cause of isolated nongranulomatous uveitis. **High-Yield Clinical Pearls for NEET-PG:** * **Granulomatous vs. Nongranulomatous:** Granulomatous uveitis (large "mutton-fat" KPs) is associated with TB, Sarcoidosis, and Syphilis. Nongranulomatous (fine KPs) is associated with HLA-B27, trauma, and Streptococcal hypersensitivity. * **Most common cause of Anterior Uveitis:** Idiopathic. * **Most common systemic association:** HLA-B27 (Ankylosing Spondylitis). * **Treatment Gold Standard:** Topical corticosteroids and cycloplegics (to prevent synechiae).

Question 97: Which of the following statements is FALSE regarding primary intraocular lymphoma?

A. Affects elderly patients
B. Typically does not involve systemic sites
C. It is a type of Hodgkin's lymphoma (Correct Answer)
D. There is an increased risk of developing concurrent primary central nervous system lymphoma

Explanation: **Explanation:** Primary Intraocular Lymphoma (PIOL) is a rare but aggressive malignancy. Understanding its classification and association with the central nervous system (CNS) is crucial for NEET-PG. **Why Option C is False:** Primary intraocular lymphoma is almost exclusively a **Non-Hodgkin Lymphoma (NHL)**, specifically of the **Diffuse Large B-cell Lymphoma (DLBCL)** type. It is not a type of Hodgkin’s lymphoma. This is a high-yield distinction, as Hodgkin’s lymphoma rarely involves the eye. **Analysis of Other Options:** * **Option A (Affects elderly):** PIOL typically presents in the 5th to 7th decades of life (median age ~60 years). * **Option B (No systemic involvement):** By definition, PIOL is a subset of Primary CNS Lymphoma (PCNSL). It is confined to the eye and/or the CNS and typically **does not** involve systemic sites like the bone marrow, lymph nodes, or spleen at the time of diagnosis. * **Option D (Concurrent CNS risk):** There is a very strong association between the eye and the brain. Approximately 60-80% of patients with PIOL will eventually develop PCNSL, and about 20% of patients with PCNSL have ocular involvement at presentation. **Clinical Pearls for NEET-PG:** * **"Masquerade Syndrome":** PIOL is the classic "masquerade syndrome" because it mimics chronic posterior uveitis (vitritis) that is unresponsive to steroids. * **Diagnostic Feature:** Diagnostic vitrectomy shows characteristic "large cells with scanty cytoplasm and prominent nucleoli." * **Cytology/Markers:** Look for elevated **IL-10** levels in the vitreous (IL-10:IL-6 ratio > 1.0 is suggestive of lymphoma). * **Treatment:** Involves intravitreal chemotherapy (Methotrexate/Rituximab) and/or systemic chemotherapy and radiotherapy.

Question 98: What is the most common cause of ptosis?

A. Myasthenia gravis
B. Paralysis of the 3rd nerve
C. Idiopathic
D. Congenital (Correct Answer)

Explanation: **Explanation:** Ptosis (blepharoptosis) is the abnormally low position of the upper eyelid. In clinical practice and epidemiological studies, **Congenital Ptosis** is recognized as the most common cause overall. **1. Why Congenital is the Correct Answer:** Congenital ptosis is typically present at birth and is most frequently caused by **myogenic dysgenesis** of the levator palpebrae superioris (LPS) muscle. The muscle tissue is replaced by fibrous or fatty tissue, leading to poor contraction and inadequate relaxation (lid lag on downgaze). It accounts for the vast majority of pediatric cases and remains the most frequent etiology when considering all age groups globally. **2. Analysis of Incorrect Options:** * **Myasthenia Gravis:** This is a common cause of *acquired* myogenic ptosis characterized by fatigability and variability. While high-yield for exams, it is statistically less common than congenital or involutional (aponeurotic) types. * **Paralysis of the 3rd Nerve:** This causes neurogenic ptosis (often complete) associated with "down and out" eye deviation and potential pupillary involvement. It is a specific neurological emergency but not the most common cause. * **Idiopathic:** While some cases lack a clear etiology, most ptosis can be classified into structural, myogenic, neurogenic, or aponeurotic categories. **3. NEET-PG Clinical Pearls:** * **Most common cause of Acquired Ptosis:** Aponeurotic (Involutional) ptosis, caused by the disinsertion or stretching of the LPS aponeurosis (common in elderly). * **Marcus Gunn Jaw-Winking Phenomenon:** The most common type of synkinetic congenital ptosis (nerve to Pterygoid misdirected to LPS). * **Surgical Management:** * If LPS action is **good (>8mm):** Fasanella-Servat operation. * If LPS action is **fair (5-7mm):** Levator resection. * If LPS action is **poor (<4mm):** Frontalis Brow Sling operation.

Question 99: Which disease is associated with HLA-B5?

A. Vogt-Koyanagi Harada's disease
B. Reiter's syndrome
C. Posner-Schlossman syndrome
D. Behcet's syndrome (Correct Answer)

Explanation: **Explanation:** **Behcet’s Syndrome** is a multi-system, chronic relapsing inflammatory disorder characterized by the triad of oral ulcers, genital ulcers, and uveitis. The strongest genetic association for Behcet’s disease is with **HLA-B5** (specifically the **HLA-B51** subtype). In the eye, it typically presents as a "cold" bilateral non-granulomatous uveitis with a characteristic **transient shifting hypopyon** and occlusive vasculitis. **Analysis of Incorrect Options:** * **Vogt-Koyanagi-Harada (VKH) Disease:** This is strongly associated with **HLA-DR4** and **HLA-DR1**. It is a multisystem autoimmune disease targeting melanocytes, presenting with bilateral granulomatous panuveitis, poliosis, vitiligo, and neurological signs. * **Reiter’s Syndrome (Reactive Arthritis):** Part of the seronegative spondyloarthropathies, it is strongly linked to **HLA-B27**. It presents with the classic triad: "Can't see (conjunctivitis/uveitis), can't pee (urethritis), can't climb a tree (arthritis)." * **Posner-Schlossman Syndrome (Glaucomatocyclitic Crisis):** This is associated with **HLA-Bw54**. It is characterized by recurrent episodes of mild anterior uveitis with disproportionately high intraocular pressure. **High-Yield Clinical Pearls for NEET-PG:** * **HLA-B27:** Associated with "CRAP" (Crohn’s/Colitis, Reiter’s, Ankylosing Spondylitis, Psoriatic arthritis). * **HLA-B51:** The most specific marker for Behcet’s (a sub-type of B5). * **Pathergy Test:** A skin hyper-reactivity test used as a diagnostic criterion for Behcet’s. * **Behcet’s Uveitis:** It is one of the few causes of "non-granulomatous" uveitis that can lead to significant retinal vasculitis and blindness.

Question 100: Which condition presents with uveitis, auditory problems, and cutaneous issues?

A. Vogt-Koyanagi-Harada syndrome (Correct Answer)
B. Behcet's disease
C. Ankylosing spondylitis
D. Marfan's syndrome

Explanation: **Explanation:** **Vogt-Koyanagi-Harada (VKH) Syndrome** is a multisystem autoimmune disorder characterized by T-cell mediated destruction of melanocytes. Since melanocytes are found in the eye (uvea), inner ear, skin, and meninges, the clinical presentation is classic: * **Ocular:** Bilateral granulomatous panuveitis, often with exudative retinal detachment. * **Auditory:** Dysacusis, tinnitus, and vertigo. * **Cutaneous:** Poliosis (whitening of hair/eyelashes), vitiligo, and alopecia. * **Neurological:** Meningismus (headache, neck stiffness) and CSF pleocytosis. **Analysis of Incorrect Options:** * **Behcet’s Disease:** Presents with a triad of oral ulcers, genital ulcers, and uveitis (classically with a shifting hypopyon). It lacks auditory and cutaneous depigmentation features. * **Ankylosing Spondylitis:** Associated with HLA-B27. It typically presents with acute, unilateral, non-granulomatous anterior uveitis and sacroiliitis, but no auditory or skin involvement. * **Marfan’s Syndrome:** A connective tissue disorder (FBN1 mutation) presenting with ectopia lentis (superotemporal subluxation) and skeletal/cardiac issues, not uveitis or auditory loss. **High-Yield Clinical Pearls for NEET-PG:** * **VKH Phases:** Prodromal (flu-like/meningeal) → Uveitic (exudative RD) → Convalescent (Sugiura sign/Sunset glow fundus) → Chronic recurrent. * **Sugiura Sign:** Perilimbal vitiligo (depigmentation at the limbus), highly specific for VKH. * **Sunset Glow Fundus:** An orange-red discoloration of the fundus due to chronic depigmentation of the RPE. * **Epidemiology:** More common in pigmented races (Asians, Hispanics, Native Americans).

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

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free