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David O. Harrington, M.D.; Milton Flocks, M.D.
JAMA. 1955;157(8):645-651. doi:10.1001/jama.1955.02950250019005.
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Extrafoveal vision is one of the most important of all ocular functions. It is essential to locomotion, and, in this era of rapid movement, it is of greater protective value to the human organism than any other of the special senses. Certainly it is of more importance today than ever before in history. A correct analysis of abnormalities of the visual field has a diagnostic value in disease of the entire visual pathway that can hardly be overemphasized. Ocular dysfunction is frequently reflected in defective visual fields as are disease in the entire supratentorial compartment of the intracranial cavity and some general systemic disturbances of both somatic and psychic origin. Examination of the visual field includes many methods and devices. Most of them are cumbersome and difficult to use with any degree of both speed and accuracy. The complexity of the methods available, the time required to apply these methods,


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