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Non-paralytic squint

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The features of a non-paralytic, or concomitant, squint include:

  • usually congenital
  • diplopia is absent
  • extraocular muscles and nerves are grossly normal
  • the angle between the longitudinal axes of the eyes remains constant on testing eye movements
  • both eyes have full movement if tested separately

There is excess tone in one muscle compared with its antagonist resulting in deviation of the eye.


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