[The syndrome of congenital unilateral hyperfunction of the inferior oblique muscle: clinico-pathogenetic variants].

Examination of 21 children with unilateral congenital paresis of superior oblique muscle and of 50 children with unilateral hyperfunction of inferior oblique muscle has shown that both forms of early squint have a picture of the same syndrome of oblique muscles disfunction as a primary congenital defect of muscular balance. A constant sign of the syndrome is unilateral hypertropia of adduction, disappearing or sharply reducing in abduction of the upward deviated eye, as well as horizontal squint of a convergent type, more frequently esotropia, nonaccommodative or partially accommodative, accompanied by a V-sign. It is proposed to name this syndrome as "syndrome of congenital unilateral hyperfunction of inferior oblique muscle".