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Correspondence
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Volume 358:970-971 February 28, 2008 Number 9
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Medical Mystery: Cloud Surrounding the Optic Disks — The Answer

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by Randhawa, S.
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The medical mystery in the January 3 issue1 involved fundus photographs (Figure 1) showing a yellow cloud surrounding the optic disks of a 42-year-old man. His visual acuity and the examination of the anterior segment of each eye were normal. The diagnosis is myelinated retinal nerve fibers, a developmental anomaly in which myelination appears beyond the lamina cribrosa or the optic nerve head, on the nerve fibers of the disk and retina. The myelinated fibers appear as striated white patches with feathery borders, caused by differential myelination of individual axons. Myelinated retinal nerve fibers occur in 1% of . . . [Full Text of this Article]



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