Question
A 20 year old college student comes to your clinic with complaints of pain, redness, photophobia, eyelid swelling and a foreign body sensation in his eyes. He gives a history of using contact lenses. Examination of eyes shows corneal ulceration, stromal ring and perineural infiltrates.
Assertion: Confocal microscopy of the infected cornea is the most accurate method for identifying the organism causing the infection in this patient.
Reason: This condition is caused by a free living protozoa acanthamoeba.
| A. |
Both Assertion and Reason are true, and Reason is the correct explanation for Assertion |
| B. |
Both Assertion and Reason are true, and Reason is not the correct explanation for Assertion |
| C. |
Assertion is true, but Reason is false |
| D. |
Assertion is false, but Reason is true |
Show Answer
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Correct Answer » D Explanation |
 |
- The diagnosis is Acanthamoeba keratitis.
- Clues: contact lens use, severe ocular pain, radial perineural infiltrates (keratoneuritis), and stromal ring infiltrate.
- Reason is true: Acanthamoeba is a free-living protozoan.
- Assertion is false: Confocal microscopy is useful for detecting characteristic cysts but is not categorically considered the most accurate definitive method for organism identification.