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Carl Ellenberger, Jr., MD

Arch Neurol. 1974;30(3):193-201.

Abstract
Modern, hemispheric, projection perimeters have made it possible to obtain much more accurate information about the extent and progress of lesions affecting the visual pathways than one can gain by using the tangent screen and older arc perimeters. The newer instruments provide precisely controlled and standardized testing conditions that are necessary for "quantitative" perimetry, ie, determining all three dimensions of Traquair's "island of vision." The third dimension, sensitivity to light and contrast, is directly measured by static perimetry, a valuable new method that has not yet been used to full advantage in neuro-ophthalmic diagnosis. This review describes the principles and techniques of quantitative perimetry, discusses some of the variables that affect the results of its use, and demonstrates its application to diagnostic problems.

Author Affiliations
St. Louis

From the departments of ophthalmology and neurology, Washington University School of Medicine, St. Louis.

Footnotes
Accepted for publication Aug 9, 1973.

Reprint requests to Division of Neurology, Milton S. Hershey Medical Center—The Pennsylvania State University, Hershey, PA 17033 (Dr. Ellenberger).

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