primary deviation

pri·mar·y de·vi·a·tion

the ocular deviation seen in paralysis of an ocular muscle when the nonparalyzed eye is used for fixation.

pri·mar·y de·vi·a·tion

(prī'mar-ē dē-vē-ā'shŭn) The ocular deviation seen in paralysis of an ocular muscle when the nonparalyzed eye is used for fixation.