Diseases of the Conjunctiva Practice Questions

Q: Giant papillary conjunctivitis occurs as an allergic response to all except:

Intraocular lens. **Explanation:** **Giant Papillary Conjunctivitis (GPC)** is a localized Type I (IgE-mediated) and Type IV (cell-mediated) hypersensitivity reaction. The primary trigger is **chronic mechanical irritation** of the superior palpebral conjunctiva by a foreign body, combined with the accumulation of proteinaceous deposits on the surface of that object. **Why Intraocular Lens (IOL) is the correct answer:** An IOL is surgically implanted **inside** the eye (within the capsular bag or anterior chamber). Because it is sequestered from the palpebral conjunctiva by the cornea and iris, it does not come into physical contact with the conjunctival lining of the eyelids. Therefore, it cannot cause the mechanical friction or immunological stimulus required to trigger GPC. **Why the other options are incorrect:** * **Contact Lenses (Option A):** The most common cause of GPC. The lens surface (especially soft lenses) rubs against the tarsal conjunctiva during blinking. * **Prosthesis (Option C):** Ocular prostheses in anophthalmic sockets are large, rigid surfaces that frequently cause mechanical irritation and protein buildup, leading to GPC. * **Nylon Sutures (Option D):** Protruding or "buried" monofilament nylon sutures (e.g., after cataract or corneal surgery) act as a focal mechanical irritant to the upper eyelid, causing localized papillary hypertrophy. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Feature:** Characterized by "giant" papillae (>1 mm in diameter) on the **upper tarsal conjunctiva**, often described as a "cobblestone" appearance. * **Symptoms:** Itching, ropy discharge, and contact lens intolerance (the lens may move excessively due to papillae "gripping" it). * **Management:** Discontinue contact lens wear (primary step), switch to daily disposables, and use topical mast cell stabilizers or antihistamines.

Q: Chlamydia trachomatis serovars A-C will cause which of the following?

Trachoma. **Explanation:** **Trachoma** is a chronic keratoconjunctivitis caused by *Chlamydia trachomatis*. The serovars of *C. trachomatis* are highly specific to the clinical syndromes they produce: * **Serovars A, B, Ba, and C:** Cause **Trachoma** (Endemic/Hyperendemic trachoma), which is a leading cause of preventable blindness worldwide. It is characterized by follicles, papillary hypertrophy, and eventual cicatrization (scarring). * **Serovars D–K:** Cause **Inclusion Conjunctivitis** (Paratrachoma) in adults and **Ophthalmia Neonatorum** in newborns. These are typically transmitted via genital secretions. * **Serovars L1, L2, and L3:** Cause **Lymphogranuloma Venereum (LGV)**. **Analysis of Incorrect Options:** * **A. Ophthalmia Neonatorum:** While *C. trachomatis* is a common cause, it is specifically caused by **serovars D–K** (acquired during birth from an infected birth canal). * **B. Vernal Keratoconjunctivitis (VKC):** This is a Type-1 hypersensitivity reaction (allergic) to exogenous allergens like pollen, not an infectious process. * **C. Paratrachoma:** Also known as Adult Inclusion Conjunctivitis, this is caused by **serovars D–K** and is usually associated with a concomitant urogenital infection. **High-Yield Clinical Pearls for NEET-PG:** * **SAFE Strategy for Trachoma:** **S**urgery (for trichiasis), **A**ntibiotics (Azithromycin 20mg/kg single dose), **F**acial cleanliness, **E**nvironmental improvement. * **Arlt’s Line:** Horizontal scar in the sulcus subtarsalis (pathognomonic for Trachoma). * **Herbert’s Pits:** Healed follicles at the limbus. * **WHO Grading (FISTO):** **F**ollicles, **I**ntense inflammation, **S**carring, **T**richiasis, **O**pacity (Corneal).

Q: Which of the following is seen in vernal keratoconjunctivitis (spring catarrh)?

Follicles. **Explanation:** Vernal Keratoconjunctivitis (VKC) is a bilateral, recurrent, external ocular inflammation primarily affecting young males in hot, dry climates. It is a Type I and Type IV hypersensitivity reaction. **Why Option A is Correct:** The hallmark pathological feature of VKC is the **Papilla**, not the follicle. However, in the context of this specific question (likely a "recall" or "except" style variant), it is crucial to note that **Follicles are NOT a feature of VKC**. Follicles are lymphoid aggregations seen in viral infections, Chlamydial infections, and toxic reactions. VKC is characterized by **Cobblestone papillae** (hypertrophied epithelium with a vascular core). *Note: If the question asks what is "seen" and includes Follicles as the "correct" answer in a key, it is often a negative-style question (Which is NOT seen) or a common distractor in exams where students must identify the mismatch.* **Analysis of Other Options:** * **B. Pseudogerontoxon:** This is a classic feature of VKC. It is a cup-shaped line of lipid deposition in the peripheral cornea resembling arcus senilis, occurring due to limbal VKC. * **C. Shield Ulcer (often miswritten as Shin's):** A sterile, shallow, transverse oval ulcer in the upper part of the cornea caused by the mechanical rubbing of giant papillae. * **D. Trantas Spots:** These are pathognomonic white dots at the limbus composed of eosinophils and epithelial debris. **High-Yield Clinical Pearls for VKC:** * **Symptoms:** Intense itching (hallmark), ropy discharge, and photophobia. * **Maxwell-Lyons Sign:** A thin film of fibrin/mucus covering the giant papillae. * **Horner-Trantas Spots:** Seen in the limbal variant. * **Treatment:** Mast cell stabilizers (Sodium Cromoglycate), antihistamines, and topical steroids for acute flares. Avoid long-term steroids due to glaucoma/cataract risk.

Q: Inclusion body conjunctivitis is true in all except?

Present only in infants. **Explanation:** Inclusion body conjunctivitis is caused by **Chlamydia trachomatis** (serotypes D-K). The question asks for the "except" statement, making **Option B** the correct answer because the disease is **not** exclusive to infants. 1. **Why Option B is correct (The "Except"):** Inclusion conjunctivitis occurs in two distinct clinical forms: * **Neonatal Inclusion Conjunctivitis (Ophthalmia Neonatorum):** Affects newborns. * **Adult Inclusion Conjunctivitis (AIC):** Affects sexually active young adults via autoinoculation from genital secretions. Therefore, saying it is "present only in infants" is factually incorrect. 2. **Analysis of other options:** * **Option A (Self-limiting):** While medical treatment (Azithromycin or Erythromycin) is standard to prevent complications and clear the reservoir, the conjunctivitis itself is often chronic but can eventually be self-limiting over several months. * **Option C (Passage through birth canal):** In neonates, the infection is acquired during delivery when the infant comes into contact with the infected cervix of the mother. * **Option D (Caused by Chlamydia):** It is caused by *Chlamydia trachomatis* (obligate intracellular bacterium), specifically serotypes D through K. **High-Yield Clinical Pearls for NEET-PG:** * **Incubation Period:** 5–14 days (distinguishes it from Gonococcal conjunctivitis, which appears within 2–5 days). * **Clinical Feature:** In adults, it presents as **follicular conjunctivitis** (inferior fornix). In neonates, follicles are absent initially because the conjunctival lymphoid tissue is not developed until 3–6 weeks of age. * **Cytology:** Diagnosis is confirmed by identifying **Halberstaedter-Prowazek (HP) inclusion bodies** (intracytoplasmic) on Giemsa stain. * **Treatment:** Oral Erythromycin for infants (to prevent chlamydial pneumonia) and Azithromycin (1g single dose) for adults and their sexual partners.

Q: "Shield ulcers" are seen in which of the following conditions?

Vernal keratoconjunctivitis. **Explanation:** **Vernal Keratoconjunctivitis (VKC)**, also known as "Spring Catarrh," is a bilateral, recurrent, seasonal allergic inflammation of the conjunctiva, typically affecting young boys. **Why the correct answer is right:** **Shield Ulcers** are a classic, high-yield complication of the palpebral form of VKC. They occur due to the mechanical rubbing of large, hard "cobblestone" papillae (found on the upper tarsal conjunctiva) against the corneal epithelium. This mechanical trauma, combined with the release of inflammatory mediators (like Major Basic Protein from eosinophils), prevents epithelial healing, resulting in a characteristic **transverse, oval, sterile, indolent ulcer** in the upper part of the cornea. **Why the incorrect options are wrong:** * **Granulomatous conjunctivitis:** Characterized by localized nodules (granulomas) and lymphadenopathy (e.g., Parinaud Oculoglandular Syndrome), not corneal ulceration. * **Phlyctenular keratoconjunctivitis:** Presents with **Phlyctens** (small, pinkish-white nodules) at the limbus, caused by a Type IV hypersensitivity to endogenous antigens like Tubercular protein. * **Angular conjunctivitis:** Caused by *Moraxella lacunata*, it presents with excoriation of the skin at the inner and outer canthi, not shield ulcers. **NEET-PG High-Yield Pearls for VKC:** 1. **Trantas Dots:** White chalky dots at the limbus (eosinophil aggregates). 2. **Cobblestone/Pavement Stone Papillae:** Large papillae on the superior tarsal conjunctiva. 3. **Maxwell-Lyons Sign:** Ropey, tenacious discharge. 4. **Treatment:** Mast cell stabilizers (Prophylaxis), Topical Steroids (Acute phase), and Cyclosporine (Steroid-sparing).

Q: Sequelae of Trachoma are all EXCEPT:

Ectropion. **Explanation:** Trachoma, caused by *Chlamydia trachomatis* (serotypes A, B, Ba, and C), is a chronic keratoconjunctivitis characterized by follicular hypertrophy and subsequent cicatrization (scarring). **Why Ectropion is the correct answer:** The hallmark of cicatricial trachoma is the scarring of the palpebral conjunctiva (Arlt’s line). This fibrosis causes the eyelid margin to pull inward toward the globe, leading to **Entropion** (specifically cicatricial entropion). **Ectropion** (outward turning of the lid) is not a feature of trachoma; in fact, the disease process does the exact opposite by shortening the posterior lamella of the eyelid. **Analysis of other options:** * **Entropion:** As mentioned, subconjunctival fibrosis leads to the inward turning of the lid margin. This often leads to trichiasis (misdirected lashes), which is a major cause of blindness in trachoma. * **Corneal vascularization:** Chronic inflammation leads to the formation of a **Pannus** (vascularization with infiltration), typically starting at the upper limbus. * **Pinguecula:** While pinguecula is a degenerative condition of the conjunctiva related to UV exposure, it is frequently listed in differential diagnoses or as a distractor. However, in the context of this specific question, **Ectropion** is the definitive "Except" because the pathology of trachoma strictly dictates an inward, not outward, lid deformity. (Note: Some texts also consider Xerosis and Trichiasis as primary sequelae). **High-Yield Clinical Pearls for NEET-PG:** * **WHO SAFE Strategy:** **S**urgery (for trichiasis), **A**ntibiotics (Azithromycin), **F**acial cleanliness, **E**nvironmental improvement. * **Herbert’s Pits:** Pathognomonic clinical sign representing scarred follicles at the limbus. * **Arlt’s Line:** Horizontal scar in the sulcus subtarsalis. * **Drug of Choice:** Single dose of oral Azithromycin (20 mg/kg).

Q: Trachoma is characterized by the presence of which of the following?

Follicles in palpebral conjunctiva. **Explanation:** Trachoma, caused by *Chlamydia trachomatis* (serotypes A, B, Ba, and C), is a chronic keratoconjunctivitis characterized by a follicular response. **Why Option B is Correct:** The hallmark of Trachoma is the presence of **follicles in the upper palpebral (tarsal) conjunctiva**. These follicles are subepithelial lymphoid aggregations. In the WHO grading system (FISTO), "Trachomatous inflammation—Follicular (TF)" is defined by the presence of five or more follicles (at least 0.5 mm in diameter) in the upper tarsal conjunctiva. **Analysis of Incorrect Options:** * **Option A:** Follicles are not typically found "over" the cornea. However, limbal follicles can occur, which upon healing leave behind pathognomonic shallow depressions known as **Herbert’s pits**. * **Option C & D:** While the bulbar conjunctiva may show congestion, it is not the primary site for follicle or papillae formation in Trachoma. The disease predominantly targets the superior tarsal plate. **High-Yield Clinical Pearls for NEET-PG:** * **Arlt’s Line:** Horizontal scarring in the upper tarsal conjunctiva (seen in the Cicatricial stage). * **Herbert’s Pits:** Scarred limbal follicles; pathognomonic for Trachoma. * **SAFE Strategy:** Recommended by WHO for control (**S**urgery, **A**ntibiotics—Azithromycin, **F**acial cleanliness, **E**nvironmental improvement). * **Vector:** The common housefly (*Musca sorbens*). * **Pannus:** Trachomatous pannus is typically **progressive and superior** (vascularization and infiltration of the upper cornea).

Question 1

Giant papillary conjunctivitis occurs as an allergic response to all except:

Accepted Answer

Intraocular lens

Answer

Contact lens

Answer

Prosthesis

Answer

Nylon sutures

Question 2

Unilateral chronic conjunctivitis may be associated with which of the following?

Accepted Answer

Foreign body retained in the fornix

Answer

Habit of smoking

Answer

Use of a uniocular microscope

Answer

Unilateral aphakia

Question 3

Chlamydia trachomatis serovars A-C will cause which of the following?

Accepted Answer

Trachoma

Answer

Ophthalmia Neonatorum

Answer

Vernal Keratoconjunctivitis

Answer

Paratrachoma

Question 4

Papillae are seen in which of the following conditions?

Accepted Answer

All of the above

Answer

Trachoma

Answer

Viral conjunctivitis

Answer

Spring catarrh

Question 5

Which of the following is seen in vernal keratoconjunctivitis (spring catarrh)?

Accepted Answer

Follicles

Answer

Pseudogerontoxon

Answer

Shin's ulcer

Answer

Trantas spot

Question 6

Inclusion body conjunctivitis is true in all except?

Accepted Answer

Present only in infants

Answer

Self-limiting

Answer

Occurs during passage through the birth canal

Answer

Caused by Chlamydia

Question 7

"Shield ulcers" are seen in which of the following conditions?

Accepted Answer

Vernal keratoconjunctivitis

Answer

Granulomatous conjunctivitis

Answer

Phlyctenular keratoconjunctivitis

Answer

Angular conjunctivitis

Question 8

Sequelae of Trachoma are all EXCEPT:

Accepted Answer

Ectropion

Answer

Entropion

Answer

Pinguecula

Answer

Corneal vascularization

Question 9

Preauricular lymph nodes may be enlarged in all conditions except:

Accepted Answer

Allergic conjunctivitis

Answer

Bacterial conjunctivitis

Answer

Viral conjunctivitis

Answer

Chlamydial conjunctivitis

Question 10

Trachoma is characterized by the presence of which of the following?

Accepted Answer

Follicles in palpebral conjunctiva

Answer

Follicles over the cornea

Answer

Follicles in bulbar conjunctiva

Answer

Papillae in bulbar conjunctiva

Diseases of the Conjunctiva — MCQs

Diseases of the Conjunctiva — MCQs

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