The paper analyses results after treatment of 80 children with vertical squint, of them 8 patients had vertical squint alone and the rest--association of vertical and horizontal squint. Most of the children had divergent vertical deviation. For correction of vertical squint, myoplastic operations were used. In case of mixed squint with the angle of 5-7 degrees, the lengthening of horizontal muscles was made at the first stage. In case of more pronounced angles of vertical deviation, one-stage lengthening of horizontal and vertical rectus muscles was made. In case of vertical squint alone, superior and inferior rectus muscles were operated. The positive effect was achieved in 80% of cases.