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ring scotoma in Medicine

ring scotoma

n.
  1. An annular area of blindness in the visual field surrounding the point of fixation, associated with glaucoma and pigmentary degeneration of the retina.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.