[Histological examination on disks obtained by goniotrephining with scleral flap (author's transl)]

Histological examination with serial sections of 26 disks obtained by goniotrephining with scleral flap showed in three cases only lamellas and Descemet's membrane. Twenty-three disks contained trabecular meshwork, fourteen of these Schlemm's canal. In three disks excision reaches as far as the ciliary muscle. In three of the twenty-six eyes the intra-ocular pressure was not regulated after the operation. It seems that in goniotrephining with scleral flap the opening of Schlemm's canal has no important influence on the postoperative regulation of the final intra-ocular pressure.