April 1967
Volume 6, Issue 2
Free
Articles  |   April 1967
An Electrical Model of the Human Eye
Author Affiliations
  • EARLE H. McBAIN
    Department of Ophthalmology and the Francis I. Proctor Foundation of the University of California-San Francisco Medical Center San Francisco, Calif.
  • W. K. McEWEN
    Department of Ophthalmology and the Francis I. Proctor Foundation of the University of California-San Francisco Medical Center San Francisco, Calif.
  • MARVIN SHEPHERD
    Department of Ophthalmology and the Francis I. Proctor Foundation of the University of California-San Francisco Medical Center San Francisco, Calif.
Investigative Ophthalmology & Visual Science April 1967, Vol.6, 171-176. doi:
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      EARLE H. McBAIN, W. K. McEWEN, MARVIN SHEPHERD; An Electrical Model of the Human Eye . Invest. Ophthalmol. Vis. Sci. 1967;6(2):171-176.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The basic electrical model of the human eye can be distorted analogously to the distortion occasioned by the suction cup procedure. By using the values for the facility of outflow (C) and for stress relaxation (RQ) determined by tonography, the output of the model matches the clinically observed data when suitable adjustments are made for flow (F) and episcleral venous pressure (Pv). From such a match the following information is elicited: (1) flow is uniquely determined and thereby Pv is obtained by calculation, (2) the decay curve confirms the values for C, RQ, F and Pv, and, (3) the time necessary for the re-establishment of full episcleral venous pressure appears, in some cases, to be in the order of several minutes.

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