Of service either as a resource for the practicing optometrist or as a textbook on instrumentation for the optometry student, this volume provides an authoritative review of the latest instrumentation used in optometric practice for both the measurement of refractive errors and the detection of abnormal ocular conditions. It describes the basic operating principles of the currently manufactured instruments and results from published clinical trials to provide a sense of the accuracy and reliability of each instrument. Annotation copyright Book News, Inc. Portland, Or.