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strabismus(stra-biz'mus) [Gr. strabismos, squinting]
A disorder of the eye in which optic axes cannot be directed to the same object. This disorder is present in about 4% of children. The squinting eye always deviates to the same extent when the eyes are carried in different directions: unilateral when the same eye always deviates; alternating when either deviates, the other being fixed; constant when the squint remains permanent; periodic when the eyes are occasionally free from it. Strabismus can result from reduced visual acuity, unequal ocular muscle tone, or an oculomotor nerve lesion. strabismal (mal), adjective; strabismic (mik), adjective Synonym: heterotropia See: microstrabismus; squint
Strabismus due to disorder of ocular accommodation. Synonym: bilateral strabismus
Strabismus affecting either eye alternately.
bilateral strabismusAccommodative strabismus.
Strabismus in which both eyes move freely but retain an unnatural relationship to each other.
Strabismus in which the deviating eye turns inward.
Strabismus in which the deviating eye turns outward.
Strabismus in which the deviation of the visual axis is in the horizontal plane.
Strabismus recurring at intervals.
Strabismus in which the same eye habitually deviates.
Strabismus with the squinting eye always the same.
Strabismus of an eye that varies in degree with the change in direction in which the eye moves.
Strabismus due to paralysis of one of the extraocular muscles.
Strabismus due to contraction of an ocular muscle.
Strabismus in which the eye turns upward.