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This 60-year-old man presented with a lifelong history of poor vision. He also noted that his eyes were in constant motion moving back and forth. His vision has been poor since childhood. Visual acuity at the present examination was measured at 20/200 in each eye. Refraction did not lead to improved vision. The anterior segment and media were within normal limits. The retina appeared as shown in the pictures.

1.	How would you describe the appearance of the retina of each eye?
	a. The optic nerves look atrophic. b. The retinas look pale. c. The vessels are transposed. d. The retinas look normal. e. none of the above
2.	The likely diagnosis in this case is:
	a. jerk nystagmus b. null point nystagmus c. altitudinal nystagmus d. congenital nystagmus e. none of the above
3.	An additional test that would be useful is:
	a. CT scan b. MRI scan c. electroretinogram d. muscle force generation e. none of the above

For answers to the above, click here on or after December 20, 2011.