Cover image for Comparison of two vision-testing devices; a study to compare visual acuity as measured by the sight-screener and the Sloan letter chart.
Title:
Comparison of two vision-testing devices; a study to compare visual acuity as measured by the sight-screener and the Sloan letter chart.
Author:
National Center for Health Statistics (U.S.)
Publication Information:
Washington, [publisher not identified], 1963.
Physical Description:
33 pages : illustrations : ; 27 cm.
General Note:
Public Health Service publication, no. 1000-Ser. 2-no. 1.
Language:
English
Subject Term:
Format :
Book