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

Walter B. Lancaster, M.D.
Boston

Arch Ophthal. 1943;30(2):278-279.

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

To the Editor:

—Captain Field's paper "A Comparison of Ocular Imagery," in the June issue (ARCH. OPHTH. 29:981, 1943), "consists of a comparison of two instruments," the eikonometer and the comparator. Details of the construction and mode of action of the comparator are not given (patents are pending), so that one must confine one's criticism to the results as published. Fortunately, these are ample to demonstrate that the data obtained by the comparator are of no value.

The "sensitivity" of each instrument is recorded for 25 subjects with 20/20 vision with or without correction. The refractive corrections are not recorded, nor is the heterophoria as measured by an independent test, such as the cover test or rod test. Fifty readings with the comparator and 52 with the eikonometer are recorded.

The sensitivity was of great significance in this as in other experiments. It is what the laboratory workers call . . . [Full Text PDF of this Article]

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