Hello friends in this blog post I have explain ophthalmology MCQ series 38. Here is the explanation of each question and its options, along with the correct answers:
1. Koeppe's nodules are seen on:
- A. Lid margin – Incorrect; these are not the location for Koeppe's nodules.
- B. Pupillary margin – Correct; Koeppe's nodules are small granulomatous deposits seen on the pupillary margin in granulomatous anterior uveitis.
- C. Limbus – Incorrect; limbal nodules are seen in other conditions like phlyctenular conjunctivitis.
- D. Conjunctiva – Incorrect.
Answer: B. Pupillary margin
2. Chalazion is the infection of:
- A. Meibomian gland – Correct; Chalazion is a chronic granulomatous inflammation of the Meibomian gland.
- B. Zeis gland – Incorrect; Zeis gland infection results in external hordeolum.
- C. Lacrimal gland – Incorrect; inflammation here is dacryoadenitis.
- D. Moll's gland – Incorrect; Moll’s gland involvement can also cause external hordeolum.
Answer: A. Meibomian gland
3. Epidemic keratoconjunctivitis is caused by:
- A. Dryness – Incorrect; dryness causes keratitis sicca.
- B. Allergens – Incorrect; allergens cause allergic conjunctivitis.
- C. Adenovirus – Correct; specifically adenovirus serotypes 8, 19, 37.
- D. Bacteria Moraxella – Incorrect; causes angular conjunctivitis.
Answer: C. Adenovirus
4. Distichiasis is:
- A. An extra row of lashes – Correct; it's a congenital or acquired condition with extra eyelashes.
- B. Misalignment of lashes – Incorrect; that's trichiasis.
- C. Absence of lashes – Incorrect; known as madarosis.
- D. White lashes – Incorrect; called poliosis.
Answer: A. An extra row of lashes
5. The most diagnostic sign of anterior uveitis is:
- A. Aqueous flare – Incorrect; seen, but not most diagnostic.
- B. KPs (Keratic precipitates) – Correct; their presence on the endothelium is diagnostic.
- C. Miosis – Often present but not diagnostic.
- D. Raised IOP – Can occur secondarily, not diagnostic.
Answer: B. KPs
6. Trachoma is a:
- A. Viral infection – Incorrect.
- B. Bacterial infection – Correct; caused by Chlamydia trachomatis.
- C. Fungal infection – Incorrect.
- D. Allergic reaction – Incorrect.
Answer: B. Bacterial infection
7. The Vistech chart is used for evaluation of:
- A. Distance vision – Incorrect.
- B. Near vision – Incorrect.
- C. Colour vision – Incorrect.
- D. Contrast sensitivity – Correct; it measures contrast sensitivity at different spatial frequencies.
Answer: D. Contrast sensitivity
8. If axial length is increased, IOL power will:
- A. Increase – Incorrect.
- B. Decrease – Correct; longer eyes require lower IOL power.
- C. Remain same – Incorrect.
- D. None – Incorrect.
Answer: B. Decrease
9. The jack-in-the-box phenomenon is observed in Aphakia correction using:
- A. Spectacle – Correct; high plus lenses can cause image displacement leading to this phenomenon.
- B. Contact lens – Incorrect.
- C. IOL – Incorrect.
- D. All – Incorrect.
Answer: A. Spectacle
10. In the hypermetropic eye, the second principal focus lies:
- A. Behind the Retina – Correct; light focuses behind the retina in hypermetropia.
- B. In front of the Retina – Incorrect; that’s myopia.
- C. On the Retina – Incorrect; that’s emmetropia.
- D. At infinity – Incorrect.
Answer: A. Behind the Retina
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