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Not Now/Number of Subjects.
—Two errors occurred in the article titled "An Electrodiagnostic Index of Macular Degeneration: Use of a Checkerboard Pattern Stimulus," which was published in the December Archives (88:619-624, 1972).The sentence beginning in line 2 of column 2 on page 621 should read: "This is not always possible..." (not "now always").On page 622, the parenthetic figures in the legend for Fig 4 should read 2 Ss (not 25s) and 3 Ss (not 35s), respectively.
CORRECTION. Arch Ophthalmol. 1973;89(2):121. doi:10.1001/archopht.1973.01000040123013