An objective noninvasive diagnostic procedure permitting continuous registration of ocular arterial pulsation and determination of retinal and ciliary arterial blood pressures is presented. Arterial pulsation of both eyes is recorded using two infrasound transducers which are connected pneumatically with suction cups placed temporally on the sclerae. By means of a suction pump the intraocular pressure (IOP) of both eyes can be raised artificially to desired values. It is thus possible to study the ocular pulse oscillogram at different IOP values and to determine retinal and ciliary arterial blood pressures without having to perform ophthalmoscopy. Results from first tests of the oculo-oscillo-dynamograph device and data obtained from 30 healthy persons are discussed.

OPT is a new tonographic procedure permitting easy and reproducible examination of the regulative IOP behavior and the detection of impaired hydrodynamics as an early sign of glaucoma. OPT avoids errors associated with conventional tonographic procedures, takes measurements in IOP ranges where better separation between healthy and glaucoma eyes may be expected, performs simultaneous examination of both eyes, and permits IOP measurement by applanation tonometry in all phases of the examination process. OPT is easier to perform, is better tolerated by the patient and only takes half as long as conventional tonography. The effectiveness of the new procedure is demonstrated by the results of examinations of 253 eyes.

Retinal survival and revival times were measured in cats and rabbits at controlled retinal temperatures. While the great difference between b-wave survival times in cats and rabbits was confirmed, the revival times were distinctly shorter (30 min) than those previously found.

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In patients with POAG and in patients with NTG the ocular BF regulation was impaired and detected by the OPFA device with a high level of reliability. Ocular arterial blood pressures were increased as a result of vascular regulation to keep up the ocular perfusion pressure and to maintain ocular perfusion.