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This 23-year-old man suffered a severe electric shock 5 years ago.  He presents with pseudophakia in the right eye with vision of 20/30. Vision in the left eye is 20/200.  This vision has been going down gradually and is now about at the level of the right eye before its surgery.  He has moved to the area recently and no information is available regarding events around the right eye surgery. The man appears to be in good health otherwise. The right retina looks normal.  Details of the retina in the left eye are difficult to see because of the lens opacity.  There is no history of early onset lens opacities in this man’s family.

1.	What is the likely cause of this cataract?
	a. late idiopathic congenital cataract b. unknown c. secondary to electric shock d.  sympathetic ophthalmia e. none of the above
2.	What should be done now?
	a. cataract extraction in the usual way with insertion of an intraocular lens b. a trial of pupil dilatation c. wait to see if the opacity regresses d.  optical iridectomy e. none of the above
3.	If the optimal treatment is carried out, what is the likely prognosis?
	a. there is no way of knowing b. vision is likely to be good, as it is in the right eye c. probably not better than 20/100 d.  there may be no improvement e. none of the above

For answers to the above, click here on or after September 11, 2007.