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Article
April 1985

A Formula Correction

Arch Ophthalmol. 1985;103(4):477. doi:10.1001/archopht.1985.01050040019005
Abstract

To the Editor.  —The careful reader of our article,1 which appeared in the September Archives, will have noticed that equation 5 is incorrect as printed. At neutralization, ie, when the instrument image (I3) equals the emergent image (I3), the relative speed of the reflex (RSR) is not equal to one, as it should be according to the article. The formula is corrected by changing the plus sign to a minus sign.

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