. The Cleveland medical journal . ademy ofMedicine of Cleveland, April I, igio. Lauder—Exophoria 769 pass through the ordeal for himself, working out a satisfactorybasis of understanding along certain defined principles. It is not my purpose to enter into a lengthy dissertation onthe subject of exophoria, but rather to state concisely the con-dition, its causation, symptoms, and treatment. Definition: Exophoria is a tendency of the eyes to deviateoutward so that unless held in place by continuous effort, whichis controlled by the power of fusion, they diverge from the pointof fixation. Exposit
. The Cleveland medical journal . ademy ofMedicine of Cleveland, April I, igio. Lauder—Exophoria 769 pass through the ordeal for himself, working out a satisfactorybasis of understanding along certain defined principles. It is not my purpose to enter into a lengthy dissertation onthe subject of exophoria, but rather to state concisely the con-dition, its causation, symptoms, and treatment. Definition: Exophoria is a tendency of the eyes to deviateoutward so that unless held in place by continuous effort, whichis controlled by the power of fusion, they diverge from the pointof fixation. Exposition: By the use of a Maddox rod, which consistsof a glass rod or series of rods mounted in a disc to fit the trialframe, the natural image of a small flame, such as a candle orgas flame, placed at 20 feet distance in a dark room is convertedinto a streak of light. Assuming that the Maddox rod is placedhorizontally before the right eye, the patient will see a verticalstreak of light with that eye and the flame with the left Maddoxs Rod-test for Horizontal Deviation. The rod is before the right eye. A, the line passes through the flame,—orthophoria. B, the line passes to the right of the flame,—latent con-vergence, or exophoria. C, the line passes to the left of the flame,—latentdivergence, or exophoria. Each eye now having a separate object of widely differentshape to look at, the power of fusion is destroyed and, as aresult, each eye will occupy its independent position in the there is perfect equilibrium between the lateral recti muscles 770 The Cleveland Medical Journal of the eyes the streak of light will pass through the flame; ifthere is a tendency to convergence the streak of light will be tothe right of the flame, while, if there is a tendency to divergence,the streak of light will be to the left of the flame, which condi-tion will indicate exophoria. This can be measured by prismsso that the exact amount of deviation may be known in prismdegrees.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmedicine, bookyear191
