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This edition of Duke-Elder's popular textbook on refraction was necessitated by the demand, but, as the author says in the preface, "Few changes have been made in this new edition, which retains the essential character of its predecessor, a circumstance rendered imperative owing to the exigencies of military service." For those who do not know the earlier editions, it may be repeated that this is a comparatively short textbook that presents the subject of the correction of defects of the optical system of the eyes and the associated muscles in a practical manner. Theory and mathematics have been eliminated as far as possible and stress has been laid on clinical practice. Consequently it is an ideal book for the student and beginner in ophthalmology, but at the same time it contains the summation of so much clinical experience that the trained ophthalmologist can profit materially and enjoyably by a study
The Practice of Refraction. JAMA. 1943;123(1):66. doi:10.1001/jama.1943.02840360068041
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