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right eye (OD)

left eye (OS)

A 35-year-old female in good health presented with visual complaints.  She has had prior eye “infections” treated as a child.  Her visual acuity is OD 20/40 and OS 20/400.  The external examination is normal, intraocular pressure is 14 mm hg in each eye and the refraction is OD +.50 and OS Plano.  Dilated fundus examination is as shown in the pictures.

1.	The most likely diagnosis is:
	a. toxoplasmosis; acute OD, chronic OS b. AIDS c. histoplasmosis d.  serpiginous retinopathy e. bird shot retinopathy
2.	The most likely cause of this is:
	a. a virus b. unknown c. an autoimmune disease d.  toxoplasma gondii e. none of the above
3.	Treatment could include:
	a. sulfamethoxazole/trimetharprim tablet twice a day for three of four weeks b. laser treatment c. nothing; it is too late d.  anti-tubercular treatment e. none of the above

For answers to the above, click here on or after December 4, 2007.