Low Vision Visual Acuity Book

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Original Feinbloom arrangement modified by using PVNumbers® and a logarithmic progression from 20/1000 to 20/20 Uniform rows of 5 numbers each from 20/100 to 20/20 Notations are gi ven in feet and M units with equivalent Snellen fractions for a 10 foot test distance. William Feinbloom , O.D., PH.D.® is a registered trademark of Designs for Vision, Inc. and is used with their permission. Show more