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optic disk
op·tic disk (plural op·tic disks)


noun 
Definition:
 
light-sensitive retinal area: a small light-sensitive area of the retina marking the point where nerve fibers from the retinal cells converge to form the optic nerve
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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