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Modification of the Friedenwald-Kinsey Formula of Intraocular Pressure

Modification of the Friedenwald-Kinsey Formula of Intraocular Pressure Abstract The formula of the intraocular pressure proposed by Friedenwald and Kinsey is the following: IOP=k(Cap P+OPAq—OPp1) where The values kin and kout are the effectiveness with which the osmotic and hydrostatic forces are converted into intraocular pressure.1 The pressure of the episcleral veins has to be considered in outflow only, but not in expressing the intraocular pressure itself.2 It seems that the effectiveness with which the osmotic and hydrostatic forces are converted into intraocular pressure is based upon their influence on inflow and outflow. The formula of the intraocular pressure can be regarded as derived from an equation of inflow and outflow, where kin and kout are coefficients of flow. The terms kin and kout are the volumes of water transferred within one minute by a pressure of 1 mm. Hg through the blood-aqueous barrier or through References 1. Kinsey, V. E.: A Unified Concept of Aqueous Humor Dynamics and the Maintenance of Intraocular Pressure: An Elaboration of the Secretion-Diffusion Theory , Arch. Ophth. 44:215, 1950.Crossref 2. Kinsey, V. E.: Personal communication to the author. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png A.M.A. Archives of Ophthalmology American Medical Association

Modification of the Friedenwald-Kinsey Formula of Intraocular Pressure

A.M.A. Archives of Ophthalmology , Volume 57 (5) – May 1, 1957

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References (1)

Publisher
American Medical Association
Copyright
Copyright © 1957 American Medical Association. All Rights Reserved.
ISSN
0096-6339
DOI
10.1001/archopht.1957.00930050699008
Publisher site
See Article on Publisher Site

Abstract

Abstract The formula of the intraocular pressure proposed by Friedenwald and Kinsey is the following: IOP=k(Cap P+OPAq—OPp1) where The values kin and kout are the effectiveness with which the osmotic and hydrostatic forces are converted into intraocular pressure.1 The pressure of the episcleral veins has to be considered in outflow only, but not in expressing the intraocular pressure itself.2 It seems that the effectiveness with which the osmotic and hydrostatic forces are converted into intraocular pressure is based upon their influence on inflow and outflow. The formula of the intraocular pressure can be regarded as derived from an equation of inflow and outflow, where kin and kout are coefficients of flow. The terms kin and kout are the volumes of water transferred within one minute by a pressure of 1 mm. Hg through the blood-aqueous barrier or through References 1. Kinsey, V. E.: A Unified Concept of Aqueous Humor Dynamics and the Maintenance of Intraocular Pressure: An Elaboration of the Secretion-Diffusion Theory , Arch. Ophth. 44:215, 1950.Crossref 2. Kinsey, V. E.: Personal communication to the author.

Journal

A.M.A. Archives of OphthalmologyAmerican Medical Association

Published: May 1, 1957

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