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November 16, 1895


JAMA. 1895;XXV(20):853-855. doi:10.1001/jama.1895.02430460019001h

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For a number of years the conviction has been deepening in the mind of the writer that latent astigmatism plays a much more important rôle in the production of asthenopia than is usually supposed, if one may judge from the attention given to this subject in text-books and monographs. This conviction has been more decided, since it has become more common to give patients lenses correcting the apparent error, to be worn continuously for one or more days, after which another test of the refraction is made.

Some of the members of this Section may remember that the writer one year ago mentioned with praise the practice, common with some ophthalmologists, of giving lenses, not only spheres but cylinders, to patients to be worn a few days for trial before writing the prescription for permanent glasses. Again, your attention is called to this procedure with the certainty that no one

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