Some authorities believe that pure insufficiency of convergence is solely of "nervous origin" and hence that operative intervention is a "great mistake" because it produces esophoria for distance and that any good result from surgical intervention is due to the correction of an "undisclosed exophoria." These opinions were expressed by Prof. A. Bielschowsky in an article published in the December 1934 issue of the Archives of Ophthalmology.
The object of this paper is to prove that pure insufficiencies, shown to be so by prolonged monocular occlusion, can be sefely corrected by my cinch shortening operation.
It is freely admitted that exophoria is present in most instances of convergence insufficiency, but I am sure that when none is disclosed by prolonged monoclear occlusion there is none. I have seen many such cases, in some of which operation was performed.
Monoclear occlusion, therefore, is essential in the diagnosis (1) to determine the
O'Connor R. SURGICAL CORRECTION OF PURE CONVERGENCE INSUFFICIENCY. Arch Ophthalmol. 1935;14(6):986–989. doi:10.1001/archopht.1935.00840120124015
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