Strabismus (squint)


  • Misalignment of the visual axes.


Divided into:

  • Concomitant (common)
  • Paralytic (rare)

Concomitant Squint

  • Due to imbalance in the extraocular muscles
  • convergent is more common than divergent


  • Due to paralysis of extraocular muscles

Detection of squint may be made by the corneal light reflection test – holding a light source 30cms from the child’s face to see if the light reflects symmetrically on the pupils.

The cover test is used to identify the nature of the squint

  • Ask the child to focus on an object
  • cover one eye
  • observe movement of the uncovered eye
  • cover other eye and repeat test


  • Eye patches may help prevent amblyopia  (also known as lazy eye, is a vision development disorder in which an eye fails to achieve normal visual acuity, even with prescription eyeglasses or contact lenses)
  • Referral to secondary care is appropriate