Diseases of the Conjunctiva Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Diseases of the Conjunctiva. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Diseases of the Conjunctiva Indian Medical PG Question 1: Cobblestone appearance of the conjunctiva is typically seen in which of the following conditions?
- A. Allergic conjunctivitis
- B. Chlamydial conjunctivitis
- C. Giant papillary conjunctivitis
- D. Vernal keratoconjunctivitis (Correct Answer)
Diseases of the Conjunctiva Explanation: ***Vernal keratoconjunctivitis***
- This condition is characterized by **large, flattened papillae** on the upper tarsal conjunctiva, which give it a classic **cobblestone appearance**.
- It is a severe, chronic form of **allergic conjunctivitis**, often seen in children and young adults, associated with severe itching and seasonal recurrence.
*Allergic conjunctivitis*
- While it involves allergic reactions and sometimes papillae, the term **"cobblestone appearance"** specifically refers to the **large, flat papillae seen in Vernal Keratoconjunctivitis**, not general allergic conjunctivitis.
- General allergic conjunctivitis often presents with **diffuse papillary hypertrophy** but not typically the characteristic cobblestoning unless it progresses to the chronic, severe form.
*Chlamydial conjunctivitis*
- This is primarily associated with **follicles** on the conjunctiva, particularly in the lower fornix, rather than a cobblestone appearance.
- It is an **infectious condition**, often linked to sexually transmitted infections, and its conjunctival findings are distinct from allergic forms.
*Giant papillary conjunctivitis*
- While it features **giant papillae** (similar to those causing the cobblestone appearance), it is typically caused by mechanical irritation from **contact lenses** or ocular prostheses, not a primary allergic etiology like VKC.
- It often affects the **upper tarsal conjunctiva** but is usually unilateral or asymmetrical and directly related to a foreign body.
Diseases of the Conjunctiva Indian Medical PG Question 2: A 25-year-old male presents with recurrent bilateral conjunctival hyperemia and a gritty sensation. Likely diagnosis?
- A. Vernal keratoconjunctivitis (Correct Answer)
- B. Herpes keratitis
- C. Episcleritis
- D. Bacterial conjunctivitis
Diseases of the Conjunctiva Explanation: ***Vernal keratoconjunctivitis***
* This is the correct diagnosis as it perfectly matches the clinical presentation: **young male patient** (VKC has male predominance, especially in adolescents/young adults), **recurrent course** (VKC is a chronic allergic condition with seasonal exacerbations), and **bilateral involvement** with gritty sensation.
* VKC is a **severe form of allergic conjunctivitis** characterized by **bilateral conjunctival hyperemia**, intense itching, gritty sensation, photophobia, and mucoid discharge. The recurrent bilateral nature in a young male is pathognomonic.
*Herpes keratitis*
* Usually presents as **unilateral eye pain**, redness, and a characteristic **dendritic ulcer** on the cornea (seen with fluorescein staining), which is not described here.
* Caused by herpes simplex virus and typically has an acute presentation rather than recurrent bilateral conjunctival symptoms. Can lead to significant vision loss if untreated.
*Episcleritis*
* Characterized by **localized sectorial redness** in one eye, often in a radial pattern, and is usually **mild and self-limiting**.
* Typically causes minimal discomfort and does not commonly present with gritty sensation or recurrent bilateral involvement as the primary feature.
*Bacterial conjunctivitis*
* Typically presents with **purulent discharge** (thick yellow-green pus) and matting of eyelids, which is not mentioned in this patient's symptoms.
* While it causes redness and grittiness, it's usually **acute and unilateral or sequential bilateral** (one eye then the other), and resolves with topical antibiotics within days, unlike the recurrent chronic nature described here.
Diseases of the Conjunctiva Indian Medical PG Question 3: Regarding Chlamydia infection of the eyes, true statements include the following except:
- A. Penicillin is the treatment (Correct Answer)
- B. Inclusion conjunctivitis is an acute ocular infection caused by sexually transmitted C. trachomatis strains (usually serovars D through K)
- C. Can be cultured
- D. Acute inclusion conjunctivitis typically presents with mucopurulent discharge
Diseases of the Conjunctiva Explanation: ***Penicillin is the treatment***
- **Penicillin** is ineffective against *Chlamydia trachomatis* because *Chlamydia* lacks a **peptidoglycan cell wall**, which is the target of penicillin.
- The standard treatment for chlamydial infections, including ocular infections, involves **azithromycin** or **doxycycline**.
*Inclusion conjunctivitis is an acute ocular infection caused by sexually transmitted C. trachomatis strains (usually serovars D through K)*
- **Inclusion conjunctivitis** is indeed caused by sexually transmitted serovars of *Chlamydia trachomatis* (typically **D through K**).
- It usually occurs in sexually active adults and can affect neonates through maternal transmission.
*Can be cultured*
- *Chlamydia* are **obligate intracellular bacteria**, meaning they can only replicate inside host cells.
- While they can be grown in cell cultures, this is a specialized technique and not a typical method for routine diagnosis due to its complexity and time-consuming nature.
*Acute inclusion conjunctivitis typically presents with mucopurulent discharge*
- **Acute inclusion conjunctivitis** is characterized by a **mucopurulent discharge**, along with **follicular conjunctivitis** and sometimes **preauricular lymphadenopathy**.
- This discharge results from the inflammatory response to the chlamydial infection in the conjunctiva.
Diseases of the Conjunctiva Indian Medical PG Question 4: What is the most common cause of superficial corneal vascularization?
- A. Graft rejection
- B. Chemical burn
- C. Interstitial keratitis
- D. Contact lens (Correct Answer)
Diseases of the Conjunctiva Explanation: ***Contact lens***
- **Inappropriate contact lens wear**, particularly extended wear or poor hygiene, is the most frequent cause of **corneal neovascularization**.
- This occurs due to **chronic hypoxia** or **inflammation** from the lens leading to vessel growth into the normally avascular cornea.
*Graft rejection*
- While graft rejection in corneal transplantation can lead to vascularization, it is a less common cause compared to contact lens wear.
- **Neovascularization** in this context often signifies a severe immune response impacting graft survival.
*Chemical burn*
- Chemical burns to the eye can cause significant **corneal damage** and subsequent vascularization as a **healing response** to severe injury.
- However, the overall incidence of chemical burns leading to neovascularization is lower than that associated with long-term contact lens use.
*Interstitial keratitis*
- **Interstitial keratitis** involves inflammation of the corneal stroma, which can lead to ghost vessels or active vascularization but is a less prevalent cause of superficial corneal vascularization than contact lens-related issues.
- It is often associated with systemic infections like **syphilis** or **Lyme disease**.
Diseases of the Conjunctiva Indian Medical PG Question 5: Patient developed acute redness of eye with mucopurulent discharge and halos. It did not stain with fluorescein. The halos subsided after washing with clean water and the patient responded to five day course of topical antibiotics. What should be your probable diagnosis?
- A. Immature senile cataract
- B. Uveitis
- C. Angle closure glaucoma
- D. Acute bacterial conjunctivitis (Correct Answer)
Diseases of the Conjunctiva Explanation: ***Acute bacterial conjunctivitis***
- The presence of **mucopurulent discharge**, **acute redness**, and "halos" (which can be caused by corneal edema secondary to inflammation) that resolved after washing suggest an infection.
- The rapid response to **topical antibiotics** further supports a bacterial etiology, and the lack of fluorescein staining rules out corneal abrasion or ulceration.
*Angle closure glaucoma*
- While it can cause **halos around lights** and acute redness, it is typically associated with **severe pain**, blurred vision, and a fixed, mid-dilated pupil.
- It would not normally present with **mucopurulent discharge** and would not resolve with simple washing or topical antibiotics.
*Uveitis*
- Uveitis can cause **redness and pain**, but typically presents with **photophobia**, ciliary flush, and often no discharge or a watery discharge, not mucopurulent.
- **Halos** are not a typical symptom, and it would not resolve with washing or a short course of topical antibiotics.
*Immature senile cataract*
- Cataracts cause **gradual, painless vision loss** and **halos around lights** due to light scatter through the cloudy lens.
- They do not cause acute redness, mucopurulent discharge, or suddenly resolve with washing.
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