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JEROME W. BETTMAN, M.D.; VICTOR FELLOWS, M.D.; PETER CHAO, M.D.; JOHN PRATT JOHNSON, M.D.

AMA Arch Ophthalmol. 1958;60(2):230-236.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Tonography has become a recognized test in clinical ophthalmology and the source of much experimental and scientific information. It is simply a method of pushing fluid out of the eye by a given weight in a given time. The problem discussed in this paper is What fluid?—Is it entirely aqueous or partly aqueous and partly blood?

The fact that the application of a tonometer to an eye for a period of time caused the pressure to drop was known to Schiøtz and his early followers. Wegner¹ concluded that the drop in tension was primarily due to displacement of blood from the uveal system. Bailliart² felt that the fall in tension was from the modification of the choroidal vascular system, which allowed itself to be flattened. Subsequent investigators have supplied ample proof that external pressure in the form of tonometry displaces aqueous from the eye, but the role of . . . [Full Text PDF of this Article]

Author Affiliations
San Francisco

From the Division of Ophthalmology, Department of Surgery, Stanford University Medical School.

Footnotes
Supported by Grant C202 of National Council to Combat Blindness, Inc., and by Grant B687 of National Institutes of Health, Education, and Welfare.

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