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This book attempts to give a new theory of the origin of comitant strabismus. The work is difficult to evaluate because it lacks clarity of expression. In his previous book, "Indications for the Kinetic Treatment of the Eyes," published in 1931, the author evolved the concept that "not fusion sense but what I called involuntary convergence, the basic movement of the di-ophthalmos or the bi-unial eye, is the kinetic power for bi-foveal single vision."
He starts with the assumption, which is undoubtedly correct, that the cause of comitant squint is to be found in some supranuclear pathway. From this point on, his reasoning is difficult to follow and he comes to the conclusion that "squint is that condition of human vision (the bi-foveal eye) where convergence and its correlate—namely the bi-fovea—are in abeyance."
One gets the impression from reading the book that the ideas it contains have merit but that
Adler FH. Squint and Convergence: A Study of Di-Ophthalmology.. Arch Ophthalmol. 1947;37(6):809. doi:10.1001/archopht.1947.00890220833013