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To the Editor:
—Through mistake, the illustration in the paper by Dr. Verhoeff, "A New Kinetic Test for Binocular Stereopsis" (Arch Ophthal 69:436-437, 1963), is not actual size as stated. The two circles should each be 37 mm instead of 21 mm in diameter, and they should be 61 mm apart.
Verhoeff FH. NEW KINETIC TEST FOR BINOCULAR STEREOPSIS. Arch Ophthalmol. 1963;70(1):139. doi:10.1001/archopht.1963.00960050141026