[Tonographic and tonometric aqueous humor outflow tests after trabeculotomy (author's transl)].

In 10 eyes which trabeculotomy was performed because of primary open angle glaucoma preoperatively, 1 to 3 months and 12 months postoperatively the diurnal curves and tonographic results were compared. The i.o. pressure was reduced in all eyes. The ocular rigidity was decreased from 0.0206 +/- 0.0019 (s.d.) preoperatively to 0.0164 +/- 0.0015 after 1 to 3 months and to 0.0168 +/- 0.0017 after 12 months. Regarding the individual change of ocular rigidity, the outflow facility was improved on an average of from 0.13 +/- 0.02 preoperatively to 0.37 +/- 0.10 or 0.20 +/- 0.03 units postoperatively. This means a reduction of the resistance to aqueous outflow from 10.62 +/- 1.89 to 3.88 +/- 0.57 or 5.77 +/- 0.77 units. The differences are statistically significant. If the changings of ocular rigidity are not regarded there is no significant improvement of the conditions of aqueous humor outflow.