The Ophthalmic Record, Vol. 12 : A Monthly Review of the Progress of Ophthalmology; January, 1903 (Classic Reprint)

Excerpt from The Ophthalmic Record, Vol. 12: A Monthly Review of the Progress of Ophthalmology; January, 1903

The principle involved in the treatment, surgical or non-surgical, of any and all forms of heterophoria, is the elimination of x, which is the doing away with the necessity for any excitation of the basal, or involuntary, centers connected with the ocular muscles. In other words, the aim of all treatment is to so relate the muscles of any pair that the tonicity of the one shall equal the tonicity of the other. In such a state, since y always equals y, the formula, of necessity, would be a y b y, whatever may be the direction of the point of fixation.

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