Ultrasonic Measurements at the Posterior Wall of Living Human Eyes

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Abstract
An ultrasonic measurement system was constructed which allowed recording and analysis of 4 radio frequency (RF) oscillograms/s from the posterior walls of living human eyes. Unwanted interferences, e.g., noise, RF interference and possible movements of the posterior ocular wall in relation to the transducer, were reduced to neutral values. Methods were devised to evaluate the data. Pulsations suggesting changes in choroidal thickness at the posterior pole in the range 10 .mu.pp were found.

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