[A modified goniotrephination technique (procedure to secure more permanent drainage) (author's transl)].

Two modified operative techniques using non-absorbable synthetic material based on the goniotrephination are described. The material used is embedded under the scleral flap at the trephination site. The procedure aims at creating a more stable and eventually a more permanent drainage. Both techniques are dealt with in detail, and the clinical results regarding the first twelve cases are reported covering an observation period of one to six months.