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October 25, 1902


JAMA. 1902;XXXIX(17):1039-1041. doi:10.1001/jama.1902.52480430021001e

The question involved in the principles controlling the non-operative interference in heterophoria is so complex and comprehensive that it would naturally be the subject for many papers, and an attempt to cover it all would be a disappointment and an impossibility in the limited time allowed. I need not tell this audience of the innumerable possibilities which may occur in a pair of eyes with their extrinsic and intrinsic muscles out of gear, of the influence of age, temperament, health, mental and physical development, of the influences of domestic and business environment, and of the often vicious effects of school life, of the inexorable law of heredity or of the inherent weakness of the ocular muscles, of the numerous and complicated anomalies of refraction, of the influence of bad light and too much light, of the influence of the various trades and occupations—I need not tell you of these things,

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