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[Capabilities and significance of electronic intraocular pressure measurements and ocular circulation checks (author's transl)].

Quantitative measurements of intraocular blood circulation by means of electric dynamo-angiotonography, estimating basic flow (Bf) and pulse volume increase (Pvi), appear to represent a further possible method of practical analysis of the criteria for evaluating the risk of progressive field losses in glaucoma. In this connection there is an obvious relationship between the hypotheses of Anderson (1971) and the fluorescein cine-angiograms of Evans (1977). There are doubtless connections between ocular arterial flow values and the visual field. The quantitative basic flow and pulse volume increase values appear to confirm this. However, dynamo-angiotonography does not claim to equal the special accuracy of qualitative fluorescein cine-angiography; it can only be a quantitative integral of the overall blood flow through the bulbus, and primarily through the choroid. Moreover, the results also indicate that the behavior of the intraocular vessels is one of the decisive factors in the functional deterioration of visual fields in glaucomatous eyes (P. Y. Evans 1977). A compensation for the weight error of the "Tonometerprobe" is built into these Friedenwald/McBain nomograms.