from
The Collaborative International Dictionary of English v.0.48
Diplopia \Di*plo"pi*a\, Diplopy \Dip"lo*py\, n. [NL. diplopia,
from Gr. ? double + the root of ? sight: cf. F. diplopie.]
(Med.)
The act or state of seeing double.
[1913 Webster]
Note: In crossed or heteronymous diplopia the image seen by
the right eye is upon the left hand, and that seen by
the left eye is upon the right hand. In homonymous
diplopia the image seen by the right eye is on the
right side, that by the left eye on the left side. In
vertical diplopia one image stands above the other.
[1913 Webster]