Comparison of two vision-testing devices
Subtitle: a study to compare visual acuity as measured by the sight-screener and the Sloan letter chart.
Series: Vital and health statistics.; no. 1
Published: 1963
Place of publication: Washington
Language: eng
Number of pages: 33
Subjects: Optometry.
Notes: Public Health Service publication, no. 1000-Ser. 2-no. 1.