Synopses & Reviews
Synopsis
Excerpt from Heterophorias and Insufficiencies a Clinical Study
Taken to be equivalent to and supersede the old ones of insufficiency of the interni and externi, even Duane, whose masterly classification of these condi tions has earned deserved recognition, taking this View; yet heterophoria means merely a tendency of the fixation lines away from the object of fixation, while insufficiency means lack of power. The old terms for exophoria and esophoria were dynamical divergence and convergence. It is the intention of the writer to show that certain forms of heterophoria may be due to errors of refraction or other optical defects, others to habit, others to the nervous sys tem, and others still to muscular spasm, excess, or insufficiency. Much has been written upon this subject in addition to that so briefly mentioned, some of it of value, and the writer proposes to treat all of the authors in the most impartial manner, as he appropriates their ideas whenever he can make use of them, without regard to their source. He has no instruments to exploit, no special method of treat ment to push, no new general disease which he has cured through the eye muscles. If, in spite of this, an original idea or so should creep in among the others, anybody is welcome to use it as his own.
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