[Focosi's tendon-lengthening technic in blockage syndromes. Mechanism of action and surgical technic].

114 subjects with esotropia and blockage syndrome were observed. Diagnosis was based upon clinical and EOGraphical data. Tendon lengthening with fascia lata was performed mono or bilaterally on medical recti, with or without associated resection of the external recti. The residual angle of strabismus and the effect on the blockage were measured to evaluate the results. Those seemed to be generally favourable. The AA. discuss upon the action of this kind of surgery on the muscular dynamic.