Refraction and How to Refract: Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-Glasses, Etc (Classic Reprint) - Tapa blanda

Sinopsis

Excerpt from Refraction and How to Refract: Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-Glasses, Etc

The chapter on Prisms has been very much enlarged, as the average book on Ophthalmology gives but little information on this branch of refraction, and, to make it more entertaining, the writer has not limited himself to the consideration of prisms in ophthalmic practice alone, and has inserted many illustrations to make the text easy of comprehension. The Author's double prism, a new and delicate test, for the detection of errors of muscular 1mbalance whether of small or great amount, is incorporated in the text. Among the other entirely new matter in this book mention may be made of Retinoscopy without a cycloplegic (chapter Among the deletions are: Schein er's Test; The Pointed Line Test; The Chromo-aberration Test, and Thomson's Ametrometer, all of which are out of date and relegated to the historical.

Many of the illustrations were drawn or photographed by the Author, and the diagrams of astigmatic eyes, as also several others, are original.

A Chinese Edition of Refraction and How to Refract, translated by Dr. James H. Ingram of Tungchou, China, was published in October, 1914.

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