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Article
November 28, 1896

THE FIELD OF MONOCULAR FIXATION AND ITS RELATION TO HETEROPHORIA.

JAMA. 1896;XXVII(22):1130-1133. doi:10.1001/jama.1896.02431000006002

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Abstract

So little is said in English text-books on ophthalmology about the field of fixation—monocular or binocular—and so much space is given to it in that portion of foreign works devoted to physiologic optics that it seemed worth while to bring up the subject for discussion here. We are so concerned in investigating the relations of the extrinsic ocular muscles, as they are engaged in fixing some point (doubtless the most important point) immediately in front of the eyes, i.e., at the center of the field of fixation, that we are apt to lose sight of the fact that the fixing of eccentric objects and points at the extreme periphery of the field is also of great importance. It should be remembered that while binocular vision may be obtained and maintained with ease, so long as the object fixed is directly in front, this result is often difficult or impossible when

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