[Intraocular pressure lowering effect of dosed laser coagulation of the corneoscleral trabeculum. I. Tonographic analysis of the early postoperative phase].

In 10 eyes suffering from glaucoma simplex, trabeculoplasty (TBP) was performed in the lower half of the corneoscleral trabeculum. Using an applanation tonometer, the diurnal pressure was recorded for 8 days and tonography performed daily at 10 a.m. TBP was performed at 9:30 a.m. on the second day. The results of this study revealed a marked elevation of intraocular pressure immediately after the TBP, accompanied by a highly significant increase in the resistance to aqueous outflow (R) and an equally highly significant fall in the minute volume of aqueous flow (F). During the following 6 days the intraocular pressure remained lower, the drop in R was significant for two days but not at the end, and the fluctuations of F were negligible throughout.