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A 66-year-old male presents with the sudden onset of excruciating, bilateral eye pain described as “coal burning in my eyes.” Visual acuity is 20/60 OU. Twelve hours prior he had been repairing a defective 50W ultraviolet (UV) light box. The top and bottom rows are slit lamp and fluorescein images of the right and left corneas, respectively.

1.	The above condition was most likely produced by which of the following:
	a. anterior basement membrane corneal dystrophy b. chronic exposure secondary to cranial nerve VII palsy c. UV radiation damage to corneal epithelial cells d. irritation from chemical exposure to corneal surface e. none of the above
2.	In this case, the fluorescein staining represents which of the following?
	a. a peculiar substance within the epithelium b. damaged epithelial cells c. mucoid debris in the tear film d. filaments e. (b) and (d)
3.	Although this condition is rarely seen today, which populations are at an increased risk?
	a. Alaskan b. Middle-Eastern c. recreational tanning d. welders e. all of the above

4.	Which of the following is true regarding treatment and prognosis?
	a. Most cases require triple-antibiotic therapy. b. Epithelial debridement is the therapy of choice. c. The condition is self-limiting and responds well to aggressive lubrication. d. Ultraviolet eye protection can prevent majority of cases. e. all of the above f. (c) and (d) only

For answers to the above, click here on or after December 21, 2010.