[Changes in the outflow facility following cyclocryocoagulation in primary glaucoma. A tonographic study].

The tonographic results in the prospective study carried out by the authors showed that there is a two-phase reaction of the aqueous dynamics after cyclocryotherapy. In the first period, 1 to 3 weeks post-operatively, the aqueous flow decreases. Subsequently it recovers and almost reaches preoperative values. In this stage the outflow facility increases remarkably and is thus the main cause of the reduction in intraocular pressure. There is a close correlation between the changes in outflow and the widening of the chamber angle which can be seen by gonioscopy.