Classification of the Motor Anomalies of the Eye Based Upon Physiological
Classification of the Motor Anomalies of the Eye Based Upon Physiological
A Alexander Duane
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A difference of 1° or more between the right anil Ictt sursum- vergence or, in any case, a sursumvergence exceeding *1° (prism), indicates the probable existence of a hyperphoria. NEW CLASSIFICATION OF MOTOll ANOMALIES. 39 Way in which the Tests are applied in Practice. In prac- tice I have found it best to apply the tests in the following order: (1) Inspection, I note the apparent relations of the eyes in the primary position and also for associated parallel and con- vergent movements, using f...or the purpose some rather fine test- object such as a pen-point which the patient is made to follow with the eyes as it is carried in different directions. Any very obvi- ous deflection, e. G. , a marked concomitant strabismus or a par- alytic squint, can be made out at once by this means alone. (2) Screen and Parallax Tests. These are made simultan- eously. First, a test-object 20 feet off is taken, and then one at the ordinary reading distance. If inspection has revealed any marked deviation or one which increases notably in any given direction of the gaze, the screen test also is applied in different portions of the field of fixation in order to corroborate these find- ings.
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