n. A defect of vision in which one eye cannot focus with the other on an object because of imbalance of the eye muscles; a squint.
the GNU version of the Collaborative International Dictionary of English
n. An affection of one or both eyes, in which the optic axes can not be directed to the same object, -- a defect due either to undue contraction or to undue relaxation of one or more of the muscles which move the eyeball; squinting; cross-eye.
The Century Dictionary and Cyclopedia
n. Squint; a failure of one of the visual axes to pass through the fixation-point (the point which is looked at).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. abnormal alignment of one or both eyes
Word Usage
"As a child, Barry had three operations to fix her crossed eyes (a condition called strabismus), but she didn't realize that she couldn't see in 3-D until she attended a college lecture on vision."