strabismus (str a-biz'mus)

Squinting, cro -eye: an inability to bring the visual axes of both eyes to bear simultaneously on one point, the axis of vision of one eye always deviating in a certain direction from the object, alternating s. S. affecting either eye alternately, apparent s. Convergent or divergent s. in which neither eye moves when the other is closed; due to retinal incongruence, concomitant s._ S. in which the movements of the squinting eye accompany those of the normal one, but cannot fix it properly, convergent s. That variety of s. in which one eye deviates inward toward the nose. divergent s. S. in which one eye deviates outward toward the temple, paralytic s. S. due to paralysis of an ocular muscle. periodic s. S. observed in hypermetropia or myopia, occurring only when accommodation is made for near points, but not when fixation is made for distance, spastic s. S. due to spastic contraction of an ocular muscle. s. supernus, s. sur sum bergens, upward S. S. in which the squinting eye turns upward beyond the point of fixation of the other eye. [Gr., strabismos.']