Technic of Refraction, Trial Case and Refractive Instruments: a Manual of Practical Refraction With Instructions for the Operation of the Trial Case . Carrying Out a Case of Ocular Refraction

Technic Of Refraction, Trial Case And Refractive Instruments: A Manual Of Practical Refraction With Instructions For The Operation Of The Trial Case And Refractive Instruments And Methods For Successfully Carrying Out A Case Of Ocular Refraction by Thomas George Atkinson. This book is a practical, working manual on ocular refraction, detailing the components of a modern trial case and the instruments used to perform refraction and related muscular tests. It covers the assembly and use of lenses, prisms, and auxiliary devices such as the Maddox rod, stenopaic slit, and chromatic (cobalt) tests, as well as techniques for static and dynamic retinoscopy, ophthalmoscopy, ophthalmometry, phoropters, and muscle testing. The volume sets out systematic procedures for complete examination and recording, including subjective and objective methods, convergence and duction tests, and near-point assessment. It emphasizes accurate technique, step-by-step instruction, and the integration of multiple instruments to obtain reliable refractive corrections and muscle balance information. Originally published in 1922, this edition reflects foundational practices in ocular refraction and instrumentation.