Optotypes, consisting of test-letters and pictographs for measuring the acuteness of vision
By: by John Green ... and A. E. Ewing ... with thirty-five engraved plates.
Contributors: Ewing, Arthur Eugene, 1855-
Publisher: C. V. Mosby company
Published: 1923
Place of publication: St. Louis
Language: eng
Number of pages: 24
Subjects: Eye -- Examination.
Notes: The test-letters and pictographs are printed on cards 4 1/2 x 4 1/2 cm-18 1/2 x 35 1/2 cm.