VisionScienceList: letter order in snellen test

From: julian ()
Date: Mon Jul 23 2001 - 05:15:46 PDT

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    I am looking for information regarding the order of the letters in visual
    acuity tests e.g snellen, sloan,etc.

    Is there a particular reason or logic behind the order of the letters? and
    could anyone point me to some literature on the subject?

    thanks very much

    julian weaver

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