epiblepharon

[ĕp′ə-blĕfə-rŏn′]
n.
  1. A congenital horizontal fold of skin near the margin of the upper or lower eyelid caused by the abnormal insertion of muscle fibers.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.