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Cornea
(Single Best Answer) Question 1: The corneal transparency is maintained by ?
A) Keratocytes
B) Bowman's membrane
C) Descemet's membrane
D) Endothelium
Answer (Select an option above to get the answer):
(Single Best Answer) Question 2: Surface ectoderm gives rise to all of the following structures except ?
A) Lens
B) Corneal epithelium
C) Conjunctival epithelium
D) Anterior layer of iris
Answer (Select an option above to get the answer):
(Single Best Answer) Question 3: Contact lens wear is proven to have deleterious effects on the corneal physiology. Which of the following statements is incorrect in connection with contact lens wear ?
A) The level of glucose availability in the corneal epithelium is reduced
B) There is a reduction in hemidesmosome density
C) There is increased production of CO2 in the epithelium
D) There is a reduction in glucose utilization by corneal epithelium
Answer (Select an option above to get the answer):
(Single Best Answer) Question 4: Which of the following statement is true regarding Acanthamoeba keratitis ?
A) For the isolation of the causative agent, corneal scraping should be cultured on a nutrient agar plate
B) The causative agent, Acanthamoeba is a helminth whose normal habitat is soil
C) Keratitis due to Acanthamoeba is not seen in the immunocompromised host
D) Acanthamoeba does not depend upon a human host for the completion of its life-cycle
Answer (Select an option above to get the answer):
(Single Best Answer) Question 5: Enlarged corneal nerves may be seen in all of the following except ?
A) Keratoconus
B) Herpes simplex keratitis
C) Leprosy
D) Neurofibromatosis
Answer (Select an option above to get the answer):
(Single Best Answer) Question 6: An 18 year old boy comes to the eye casualty with history of injury with a tennis ball. On examination there is no perforation but there is hyphaema. The most likely source of the blood is ?
A) Iris vessels
B) Circulus iridis major
C) Circulus iridis minor
D) Short posterior ciliary vessels
Answer (Select an option above to get the answer):
(Single Best Answer) Question 7: In human corneal transplantation, the donor tissue is ?
A) Synthetic polymer
B) Donated human cadaver eyes
C) Donated eyes from live human beings
D) Monkey eyes
Answer (Select an option above to get the answer):
(Single Best Answer) Question 8: A 25 year old male gives a history of redness, pain and mild diminution of vision in one eye for past 3 days. There is also a history of low backache for the past one year. On examination there is cricumcorneal congestion, cornea is clear apart from a few fine keratic precipitates on the corneal endothelium, there are 2+ cells in the anterior chamber and the intraocular pressure is within normal limits. The patient is most likely suffering from ?
A) Acute attack of angle closure glaucoma
B) HLA B-27 related anterior uveitis
C) JRA associated uveitis
D) Herpetic keratitis
Answer (Select an option above to get the answer):
(Single Best Answer) Question 9: A soft contact lens user presents to you with pain, watering, photophobia and a white spot in the center of the cornea. What will be your initial management ?
A) Start frequent antibiotic eye drops after discontinuing the contact lens
B) Pad and bandage the eye for 12 hours
C) Frequent instillation of artificial tear
D) Topical non steroidal anti inflammatory drugs (NSAID)
Answer (Select an option above to get the answer):
(Single Best Answer) Question 10: A young man aged 30 years, presents with difficulty in vision in the left eye for the last 10 days. He is immunocompetent, a farmer by occupation, comes from a rural community and gives history of trauma to his left eye with vegetative matter 10 - 15 days back. On examination, there is an ulcerative lesion in the cornea, whose base has raised soft creamy infiltrate. Ulcer margin is feathery and hyphate. There are a few satellite lesions also. The most probable aetiological agent is ?
A) Acanthamoeba
B) Corynebacterium diphtheriae
C) Fusarium
D) Streptococcus pneumoniae
Answer (Select an option above to get the answer):
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