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tance. The possibility of the eyes not being able to maintain easily the desired convergence must also be remembered. For the recognition and treatment of the latter condition we must here refer to the very elaborate and minute teachings of Graefe on insufficiency of the internal recti. The following moro detailed directions as to the selection of glasses are taken from Donders. " When the myopia is slight, in reference to the range of accommodation, and the oyo is otherwise healthy," the glassdoi:10.1056/nejm187012290832603 fatcat:vlsch2m5nfdtjdqhhedx3ljg64