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Optics, Retinoscopy, and Refractometry, Second Edition is a valuable and up-to-date reference that allows the reader to better understand and measure the patient's refractive error. Information is presented on each of the three important topics in an easy-to-read format.

Al Lens, COMT begins Optics, Retinoscopy, and Refractometry with a focus on the basics of optics, providing the foundation for understanding retinoscopy. The detailed instructions and practical exercises help the beginning technician become proficient at the valuable skill of retinoscopy. This...

The rise of the American labor movement was characterized by bloody and revolutionary battles. From the first famous martyrs, the Molly Maguires in the Pennsylvania coal fields in the nineteenth century, to the crucial workers' victory of the 1930s in the sit-down strikes against General Motors, it has a history of pitched battles that frequently erupted into open warfare.

This is also the story of the factional wars within the American labor movement itself and of the great leaders it generated: Eugene Debs, Samuel Gompers, William Z. Foster, Bill Haywood, John L. Lewis, Walter...

This course-tested text is an ideal starting point for engineers and physicists entering the field of particle accelerators. The fundamentals are comprehensively introduced, derivations of essential results are provided and a consistent notation style used throughout the book allows readers to quickly familiarize themselves with the field, providing a solid theoretical basis for further studies.

Emphasis is placed on the essential features of the longitudinal motion of charged particle beams, together with the corresponding RF generation and power amplification devices for...

This course-tested text is an ideal starting point for engineers and physicists entering the field of particle accelerators. The fundamentals are comprehensively introduced, derivations of essential results are provided and a consistent notation style used throughout the book allows readers to quickly familiarize themselves with the field, providing a solid theoretical basis for further studies.

Emphasis is placed on the essential features of the longitudinal motion of charged particle beams, together with the corresponding RF generation and power amplification devices for...