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To the Editor.
—Dr. Gabriel's equations, which appeared in the July issue (Arch. Ophth.30: 138, 1943) are simple and correct for conversion from the Snellen to the Navy terminology. Why not make the method still simpler?This soon forms a picture in the examiner's brain, and the process becomes semiautomatic.
Allen DG. CONVERSION FORMULA FOR SNELLEN SYMBOLS. Arch Ophthalmol. 1943;30(6):810. doi:10.1001/archopht.1943.00880240128014
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