[Results of surgical treatment in strabismus convergens (author's transl)].

In 252 patients with strabismus concomitans convergens the surgical method of the combined medial rectus recession and lateral rectus resection (Fig. 1) was studied retrospectively. The reduction of the deviation was compared with the added displacement of both muscles (Figs. 2 and 3) or the displacement of one single muscles (Table 1 and 2). Fig. 4 shows the relation between the recession-resection and the reduction of the deviation. A formula for this reduction (Z) is given: Z=6.7 chi recession (in mm) + 2.2 chi resection (in mm) - 8.1. In long the recession is 3 times more effective than the resection. In 61.5% of the patients the eyes stood parallel after surgery or a residual deviation up to 5 degrees was achieved. There was a little difference in the total results of the first (1 week) and the second (6 months) postoperative control. Major differences occurred when comparing single data.