Refraction and How to Refract
Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-Glasses, Etc.
Listed as Refraction of the human eye and methods of estimating the refraction 1916
By James Thorington, A.M., M.D. · Philadelphia: P. Blakiston's Son & Co. · Second Edition
From the title page (page 4).
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