Concomitant or Non-Paralytic Squnit

This type of squint usually occurs when there is an obstacle in the sensory pathway of binocular reflex such as refractive errors, opacities, retinal or optic nerve disease. Other causes consist of faulty position of the eye, decompensation' of heterophoria, and disharmony in the accommodation-convergence relationship. This condition arises between the age of 0 to 5 years. Symptoms and signs are failure of binocular vision, deviation of the eye, equal primary and secondary deviation, and lack or limitation of eye movements.