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Title: Awful Study Guide
Review: I purchased this guide for my COT review, and thank goodness I purchased Stein's book as well or I would not have passed. The book Ledford wrote has incorrect information in the optics section, like figuring out the dioptric power of a magnifying glass. This is just an example of many errors in this text. I also found much easier ways to calculate certain formulas than contained in this text.At first I wasn't so sure that any of this information could be incorrect, however it was confirmed by an O.D. and a COMT. I also wrote to JCAHPO and they stated that Ledford's book was not an approved study guide for the COT examination.Buyer Beware!!!
