Diseases of the Conjunctiva Practice Questions

Q: Image-based question: Diagnosis is:

Vernal keratoconjunctivitis. ***Vernal keratoconjunctivitis*** - Commonly presents with **giant papillae** (cobblestone appearance) on the superior tarsal conjunctiva in young males, particularly in warm climates. - Key diagnostic features include intense **itching**, **stringy mucoid discharge**, and potential **shield ulcers** (corneal epithelial defects) due to mechanical trauma. *Trachoma* - Caused by **Chlamydia trachomatis** serotypes A-C, characterized by **Herbert pits** and conjunctival scarring. - Typically manifests with **follicular conjunctivitis** in the superior tarsal conjunctiva, often leading to **entropion** and **trichiasis** in chronic stages. *Allergic conjunctivitis* - Usually presents with bilateral **itching**, **redness**, and **watery discharge** triggered by environmental allergens like pollen. - Physical examination typically shows **diffuse papillary reaction** but lacks the characteristic **giant papillae** seen in more severe chronic forms. *Chronic follicular conjunctivitis* - Presents with numerous small **follicles** (lymphoid aggregates) rather than the large papillae characteristic of vernal disease. - Often secondary to viral infections (like **adenovirus**) or toxic reactions to topical medications, and lacks the seasonal recurrences typical of vernal keratoconjunctivitis.

Q: A 52-year-old male outdoor worker presents with a fleshy growth in his left eye associated with foreign body sensation and redness for 3 years. On examination, a triangular fibrovascular tissue is seen arising from the nasal conjunctiva and encroaching 3 mm onto the cornea, crossing the pupillary axis. Best-corrected visual acuity is reduced to 6/18, and keratometry reveals significant with-the-rule astigmatism. There is no evidence of active inflammation. What is the most appropriate management for this patient?

Excision with conjunctival autograft. ***Excision with conjunctival autograft*** - This technique is considered the **gold standard** for primary pterygium surgery as it significantly reduces the **recurrence rate** compared to simple excision. - It is indicated here because the pterygium is **progressive** (encroaching 3mm onto cornea and affecting vision) and has induced significant **astigmatism**. *Simple excision (bare sclera technique)* - Associated with a high **recurrence rate** (often reported >30-50%), making it generally unsuitable for modern management of primary pterygium. - Leaving the sclera exposed creates a large **conjunctival defect**, which triggers aggressive fibrovascular proliferation during healing. *Topical corticosteroids and sunglasses* - While this might provide symptomatic relief for mild irritation, it has **no role** in reducing the size of an established, vision-threatening fibrovascular lesion. - It does not address the **corneal encroachment** or the structural corneal changes causing the patient's blurred vision. *Observation with lubricating eye drops* - Inappropriate in this case because the lesion is already **encroaching onto the cornea** and crossing the pupillary axis, causing a documented reduction in **visual acuity**. - Observation is only acceptable for small, **stationary/quiescent** pterygia that do not cause visual impairment or significant discomfort.

Q: Best treatment for a small boy with itching in summers and Horner-Trantas spots:

Topical mast cell stabilizers + steroids. ***Topical mast cell stabilizers + steroids*** - **Horner-Trantas spots** (limbal white dots) combined with seasonal itching in a young boy is pathognomonic for **Vernal Keratoconjunctivitis (VKC)**, a chronic allergic ocular condition. - First-line management involves **topical mast cell stabilizers** (such as sodium cromoglycate) for maintenance and **topical corticosteroids** for acute exacerbations to rapidly control severe inflammation. *Oral antihistaminics* - These are typically reserved for **systemic allergic reactions** or when allergic rhinitis is present as a comorbidity. - They are generally ineffective as monotherapy for severe, localized **allergic conjunctivitis** compared to topical agents. *Antibiotics* - **Antibiotics** are strictly indicated for **bacterial conjunctivitis**, which presents with mucopurulent discharge and conjunctival injection rather than intense itching. - Their use in this scenario is inappropriate as it does not address the underlying **type I hypersensitivity reaction** causing the disease. *Surgery* - **Surgery** (such as excision of giant papillae) is reserved only for rare, refractory cases with significant **mechanical keratopathy** or visual impairment unresponsive to medical therapy. - It is never the first-line treatment for the management of the inflammatory component of **Vernal Keratoconjunctivitis**.

Q: Which of the following statements regarding acute conjunctivitis is FALSE?

Vision is typically unaffected.. ***Vision is typically unaffected.*** - In the context of this question, this is considered the **false statement** because vision is often **mildly blurred** or reduced due to the presence of **mucopurulent discharge** or debris over the cornea. - A key diagnostic feature is that this visual blurring **clears with blinking**, unlike vision loss from corneal or intraocular pathologies. *The cornea may be infiltrated.* - This is a true statement as certain forms of conjunctivitis, particularly **adenoviral infections**, can lead to **superficial punctate keratitis** or subepithelial infiltrates. - **Marginal infiltrates** can also occur in bacterial conjunctivitis due to a hypersensitivity reaction to bacterial toxins. *Topical antibiotics are often the treatment of choice.* - This is true because **broad-spectrum topical antibiotics** (e.g., fluoroquinolones) are commonly prescribed to treat bacterial causes and prevent secondary infections. - They also play a role in reducing the **contagion risk** and shortening the clinical course of the disease. *The pupil is usually unaffected.* - This is true; the pupil remains **normally reactive** to light in conjunctivitis, which helps differentiate it from serious conditions like **acute glaucoma** (dilated) or **uveitis** (miotic). - The absence of pupillary changes confirms that the inflammation is localized to the **conjunctival surface** rather than the inner ocular structures.

Q: Condition in which the eyelid is adhered to the conjunctiva is:

Symblepharon. **Explanation:** **Symblepharon** is the correct answer. It is a condition characterized by the partial or complete adhesion of the palpebral conjunctiva (lining the eyelid) to the bulbar conjunctiva (covering the eyeball). This occurs when two opposed areas of the conjunctiva lose their epithelial lining due to trauma or inflammation, leading to the formation of permanent adhesions during the healing process. Common causes include chemical burns (especially alkali), Stevens-Johnson Syndrome (SJS), and Ocular Cicatricial Pemphigoid (OCP). **Analysis of Incorrect Options:** * **Ankyloblepharon:** This refers to the adhesion of the upper and lower **eyelid margins** to each other, narrowing the palpebral fissure. It does not involve the eyeball itself. * **Trichiasis:** This is a condition where the eyelashes are misdirected and grow inward, rubbing against the cornea or conjunctiva, often causing irritation and ulceration. * **Madarosis:** This refers to the partial or complete loss of eyelashes (cilia) or eyebrows. Common causes include leprosy, blepharitis, and chemotherapy. **High-Yield Clinical Pearls for NEET-PG:** * **Pseudo-symblepharon:** A fold of conjunctiva bridges the fornix and attaches to the cornea (seen in chemical burns), but a probe can be passed beneath it (unlike a true symblepharon). * **Prevention:** In the acute phase of chemical burns, a **glass rod** is used with lubricant to break early adhesions and prevent symblepharon formation. * **Surgical Management:** Severe cases require the use of an **Amniotic Membrane Graft (AMG)** or Mucous Membrane Graft to reconstruct the fornix.

Q: Giant papillary conjunctivitis is most commonly seen in association with which of the following?

Soft contact lens wear. **Explanation:** **Giant Papillary Conjunctivitis (GPC)** is a chronic inflammatory condition characterized by large papillae (greater than 1 mm in diameter) on the superior tarsal conjunctiva. **1. Why Soft Contact Lens is Correct:** The most common association for GPC is **Soft Contact Lens (SCL) wear**. The pathogenesis is multifactorial, involving both **mechanical irritation** (the lens edge rubbing against the tarsal conjunctiva) and an **immune-mediated hypersensitivity reaction** (Type I and Type IV) to protein deposits (biofilms) that accumulate more readily on the surface of soft lenses compared to other materials. **2. Analysis of Incorrect Options:** * **Allergic response to M. tuberculosis:** This describes **Phlyctenular Keratoconjunctivitis**, which is a Type IV hypersensitivity reaction to endogenous bacterial proteins (most commonly TB or Staphylococcus). * **Intacs corneal implants:** While any foreign body (like exposed sutures or ocular prosthetics) can cause GPC, it is statistically much less common than SCL-induced cases. * **Rigid Gas Permeable (RGP) lens wear:** Although RGP lenses can cause GPC, the incidence is significantly lower than with soft lenses because RGP lenses are smaller, move more freely, and accumulate fewer protein deposits. **3. NEET-PG High-Yield Pearls:** * **Clinical Feature:** "Cobblestone" papillae on the upper tarsal plate, mucoid discharge, and contact lens intolerance. * **Key Distinction:** Unlike Vernal Keratoconjunctivitis (VKC), GPC is not strictly seasonal and is primarily a foreign-body associated reaction. * **Management:** Discontinue lens wear (primary step), switch to daily disposables, and use topical mast cell stabilizers or antihistamines. * **Differential:** If papillae are found in the **inferior** fornix, think of Chlamydial Conjunctivitis or Toxic Conjunctivitis. GPC and VKC predominantly affect the **superior** tarsus.

Q: What is the specific topical remedy suggested for angular conjunctivitis?

Zinc sulphate. **Explanation:** **Angular Conjunctivitis** is a specific type of chronic conjunctivitis characterized by inflammation limited to the intermarginal strip at the inner or outer canthi. **Why Zinc Sulphate is the Correct Answer:** The primary causative organism is **Morax-Axenfeld bacillus** (*Moraxella lacunata*). This bacterium produces a **proteolytic enzyme** (protease) that macerates the epithelium of the conjunctiva and the skin around the angles of the eye. **Zinc sulphate** acts as a specific remedy because it inhibits the action of this proteolytic enzyme, thereby arresting the tissue maceration and allowing the epithelium to heal. It is typically used as 0.25% drops. **Analysis of Incorrect Options:** * **Dexamethasone (A):** This is a potent steroid. While it reduces inflammation, it does not address the underlying bacterial cause or the specific enzymatic action of *Moraxella*, and its use can lead to complications like secondary infections or glaucoma. * **Sulphacetamide (B):** While a bacteriostatic sulfonamide, it is not the specific treatment of choice for the enzymatic pathology of angular conjunctivitis. * **Penicillin (D):** Most strains of *Moraxella* are not specifically targeted by topical penicillin, and penicillin is rarely used topically due to the high risk of hypersensitivity reactions. **High-Yield Clinical Pearls for NEET-PG:** * **Causative Organism:** *Moraxella lacunata* (Gram-negative diplobacillus). Occasionally, *Staphylococcus aureus* can cause a similar clinical picture. * **Clinical Feature:** Redness at the angles of the eye with excoriation of the surrounding skin. * **Reservoir:** The organism often inhabits the **nasal cavity**; hence, treating associated nasal infections is important to prevent recurrence. * **Modern Treatment:** While Zinc is the classic "specific" remedy, modern practice often combines it with an antibiotic like **Oxytetracycline** or **Erythromycin**.

Q: Which of the following are features of vernal conjunctivitis?

Papillary hypertrophy. **Vernal Keratoconjunctivitis (VKC)**, also known as "Spring Catarrh," is a bilateral, recurrent, external ocular inflammation primarily affecting young boys in hot, dry climates. It is a Type I and Type IV hypersensitivity reaction. ### **Explanation of Options** * **C. Papillary Hypertrophy (Correct):** This is the hallmark clinical feature of VKC. It occurs due to the proliferation of conjunctival epithelium and inflammatory cell infiltration. In the **Palpebral form**, these papillae enlarge to form a "cobblestone" or "pavement stone" appearance, typically on the upper tarsal conjunctiva. * **A. Shield Ulcer:** While this *is* a feature of VKC, it is a **complication** involving the cornea (keratopathy) rather than a primary conjunctival feature. It is a sterile, oval, transverse ulcer in the upper part of the cornea. * **B. Horner–Trantas Spots:** These are white, elevated dots found at the limbus (Limbal form) consisting of eosinophils and epithelial debris. While characteristic of VKC, papillary hypertrophy is the more fundamental pathological feature of the disease. * **D. Herbert Pits:** These are pathognomonic for **Trachoma** (Stage IV). They represent scarred follicles at the limbus and are not seen in VKC. ### **NEET-PG High-Yield Pearls** * **Demographics:** Most common in males (4:1 ratio), aged 5–15 years. * **Symptoms:** Intense itching (most common), ropy (stringy) discharge, and photophobia. * **Maxwell-Lyons Sign:** A thin film of fibrin (pseudomembrane) covering the papillae. * **Treatment:** Mast cell stabilizers (Sodium Cromoglycate) for prophylaxis; topical steroids for acute exacerbations; Cyclosporine/Tacrolimus for steroid-sparing. * **Key Distinction:** **Papillae** (vascular core) are seen in VKC/Allergy; **Follicles** (avascular lymphoid aggregates) are seen in Viral/Chlamydial infections.

Q: Which of the following is NOT a sequela of trachoma?

Proptosis. **Explanation:** Trachoma, caused by *Chlamydia trachomatis* (serotypes A, B, Ba, and C), is a chronic keratoconjunctivitis characterized by progressive scarring. **Why Proptosis is the correct answer:** **Proptosis** (forward protrusion of the eyeball) is typically caused by orbital pathologies such as tumors, cellulitis, or thyroid eye disease. Trachoma is a disease confined to the **superficial ocular surface** (conjunctiva and cornea) and the lacrimal drainage system. It does not involve the retrobulbar orbital tissues; therefore, it cannot cause proptosis. **Analysis of Incorrect Options:** * **Tylosis:** This refers to the thickening of the eyelid margin. In chronic trachoma, long-term inflammation and scarring lead to hypertrophy and thickening of the lids. * **Pseudocyst:** Also known as "Leber’s cells" or "Post-trachomatous debris," these are clear, cystic spaces formed when the conjunctival epithelium becomes trapped within the subepithelial fibrous tissue during the scarring process. * **Dacrocystitis:** Trachomatous scarring can involve the lacrimal puncta and the nasolacrimal duct, leading to obstruction. This stasis of tears predisposes the patient to chronic dacrocystitis. **High-Yield Clinical Pearls for NEET-PG:** * **Arlt’s Line:** A horizontal line of scarring on the superior palpebral conjunctiva (pathognomonic). * **Herbert’s Pits:** Scarred-down limbal follicles (pathognomonic). * **SAFE Strategy:** WHO-recommended management (**S**urgery, **A**ntibiotics—Azithromycin, **F**acial cleanliness, **E**nvironmental improvement). * **Trichiasis and Entropion:** These are the most common blinding complications due to cicatricial (scarring) changes in the lid.

Question 1

Image-based question: Diagnosis is:

Accepted Answer

Vernal keratoconjunctivitis

Answer

Trachoma

Answer

Allergic conjunctivitis

Answer

Chronic follicular conjunctivitis

Question 2

A 52-year-old male outdoor worker presents with a fleshy growth in his left eye associated with foreign body sensation and redness for 3 years. On examination, a triangular fibrovascular tissue is seen arising from the nasal conjunctiva and encroaching 3 mm onto the cornea, crossing the pupillary axis. Best-corrected visual acuity is reduced to 6/18, and keratometry reveals significant with-the-rule astigmatism. There is no evidence of active inflammation. What is the most appropriate management for this patient?

Accepted Answer

Excision with conjunctival autograft

Answer

Simple excision

Answer

Topical corticosteroids and sunglasses

Answer

Observation with lubricating eye drops

Question 3

Best treatment for a small boy with itching in summers and Horner-Trantas spots:

Accepted Answer

Topical mast cell stabilizers + steroids

Answer

Oral antihistaminics

Answer

Antibiotics

Answer

Surgery

Question 4

A 58-year-old hypertensive woman presents with sudden painless loss of vision in her left eye noticed on waking. Her blood pressure is 168/96 mmHg. There is no relative afferent pupillary defect. The fundus photograph of the left eye shows diffuse venous tortuosity and widespread retinal hemorrhages in all four quadrants, consistent with central retinal vein occlusion (Image 3). Which of the following investigations is most important to guide immediate management and reduce the risk of neovascular complications?

Accepted Answer

A. Fluorescein angiography to assess retinal capillary non-perfusion

Answer

B. B-scan ultrasonography to exclude posterior vitreous detachment

Answer

C. Optical coherence tomography of the optic nerve head for cup-to-disc ratio

Answer

D. Carotid Doppler ultrasound to exclude ipsilateral carotid stenosis

Question 5

Which of the following statements regarding acute conjunctivitis is FALSE?

Accepted Answer

Vision is typically unaffected.

Answer

The cornea may be infiltrated.

Answer

Topical antibiotics are often the treatment of choice.

Answer

The pupil is usually unaffected.

Question 6

Condition in which the eyelid is adhered to the conjunctiva is:

Accepted Answer

Symblepharon

Answer

Ankyloblepharon

Answer

Trichiasis

Answer

Madarosis

Question 7

Giant papillary conjunctivitis is most commonly seen in association with which of the following?

Accepted Answer

Soft contact lens wear

Answer

Allergic response to Mycobacterium tuberculosis

Answer

Intacs corneal implants

Answer

Rigid gas permeable lens wear

Question 8

What is the specific topical remedy suggested for angular conjunctivitis?

Accepted Answer

Zinc sulphate

Answer

Dexamethasone

Answer

Sulphacetamide

Answer

Penicillin

Question 9

Which of the following are features of vernal conjunctivitis?

Accepted Answer

Papillary hypertrophy

Answer

Shield ulcer

Answer

Horner–Trantas spots

Answer

Herbert pits

Question 10

Which of the following is NOT a sequela of trachoma?

Accepted Answer

Proptosis

Answer

Tylosis

Answer

Pseudocyst

Answer

Dacrocystitis

Diseases of the Conjunctiva — MCQs

Diseases of the Conjunctiva — MCQs

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