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January 1938

Outline of Ocular Refraction.

Arch Ophthalmol. 1938;19(1):160. doi:10.1001/archopht.1938.00850130172024

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This is an exceptionally interesting and valuable book, written by one who has evidently had considerable experience in all the practical details of prescribing glasses, from the initial refraction done in the office to the grinding of the lenses and the fitting of frames.

The chapter on applied optics deals chiefly with the theory of glasses and contains many tables which are of value and are not often found in less practical books, such as the table giving the values of decentration of cylinders at different axes and that giving the effective powers of different types of lenses.

The most stimulating chapter is that on ocular physiology, which is chiefly concerned with the relation of the muscle balance to the static and dynamic refraction. The main thesis of this is that the tonic innervation of the ocular muscles, determined by dissociation tests such as the Maddox rod, is not the

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