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LEO L. MAYER, M.D.

Arch Ophthal. 1935;14(4):541-553.

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

In a previous communication¹ it was determined that for the average normal person there exists a zone between 50 and 60 degrees on the horizontal temporal meridian outside of which there is no perception for a rapid flash of light or a speed of approximately one twenty-five thousandth of a second. As was stated at that time, such determinations were found during the attempt to study a method for investigating the chronaxia of the optic nerve.

Perimetry has a long history dating from the time of Ptolemy;² its scientific basis was laid down by von Graefe³ and Förster⁴ and is further elaborated in the present-day texts of Peter⁵ and Traquair.⁶ Many are the contributions to perimetry, but as yet no one has made use of the flash of a light as a test target. Presentation of this new method was received . . . [Full Text PDF of this Article]

Author Affiliations
CHICAGO

From the Departments of Ophthalmology, Nervous and Mental Diseases and Experimental Surgery of the Northwestern University Medical School.

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