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As an adjunct to my method for the systematic examination of school children's eyes by teachers, I have prepared a special compound test card, which I submit. It is based upon the standard types of Snellen, and is called "A Visual and Aural Chart for Schools." Roman numerals are on one side of each line and Arabic on the other. As, notwithstanding frequent instruction and printed directions, I am frequently asked by teachers, "which is the proper line to test by at twenty feet?" I have had printed under the twenty-foot line the following words: "This line should be seen by a normal eye at 20 (xx) feet," which would seem to make the matter perfectly plain.
Under the last line on the card proper, is a half broken line, at which point the lower portion of the compound card should be severed from the upper portion. Just under this
ALLPORT F. A NEW COMBINATION CHART FOR THE EXAMINATION OF SCHOOL CHILDREN'S EYES AND EARS BY TEACHERS. JAMA. 1898;XXX(26):1510–1511. doi:10.1001/jama.1898.72440780024002f
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