This Article  • References  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citing articles on Web of Science (22)  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

MATHEW ALPERN, Ph.D.

AMA Arch Ophthalmol. 1957;57(3):345-353.

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

Introduction

If the positions of the eyes are recorded photographically^1-5 or observed with a telescope 6, 7 during the process of making a horizontal vergence movement, it can be demonstrated that the record of the relative position of the lines of sight of the two eyes may differ from the convergence angles of the test targets during single binocular fixation. The exact amount of this disparity differs according to the subject and the test conditions, but there is fairly good agreement that the order of magnitude is several degrees, i. e., much larger than the size usually postulated for Panum's fusional areas,⁸ On the basis of such evidence, Tani, Ogle, Weaver, and Martens⁵ have questioned the validity of optical measurements of eye movements by photographic or telescopic observation of details on the eyes themselves or of images from light reflected from the corneas. These authors believe the . . . [Full Text PDF of this Article]

Author Affiliations
Ann Arbor, Mich.

Vision Research Laboratories and the Department of Ophthalmology, The University of Michigan.; Supported by Contract DA-36-039SC-52654 between The University of Michigan and the U. S. Army Signal Corps.

Footnotes
Received for publication Aug. 9, 1956.

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?