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Article
August 1950

TONOGRAPHIC METHOD FOR MEASURING THE FACILITY AND RATE OF AQUEOUS FLOW IN HUMAN EYES

Author Affiliations

BOSTON
From the Howe Laboratory of Ophthalmology, Harvard Medical School, and the Massachusetts Eye and Ear Infirmary.

Arch Ophthalmol. 1950;44(2):204-214. doi:10.1001/archopht.1950.00910020209003
Abstract

THE PURPOSE of this preliminary report is to describe a manner of utilizing the Schiøtz tonometer to obtain a measure of the patency of the channels of aqueous humor outflow and of the steady state net rate of aqueous humor flow. It is believed that the method described here provides a means of discerning in what measure changes in intraocular pressure are due to change in facility of outflow or to change in net rate of aqueous humor formation. A subsequent report will describe the alterations in these factors which are effected in normal and in glaucomatous eyes by various medical and surgical influences.

The electronic Schiøtz tonometer is electrically connected to an amplifier and recording galvanometer in such a manner that all measurements made by the tonometer are continuously and automatically recorded on a moving paper strip, such as is employed in electrocardiography. The apparatus is pictured in figure

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