. Refraction and muscular imbalance, as simplified through the use of the ski-optometer. muscles having been pre-viously detailed. To exercise the oblique muscles of the righteye, both Maddox rods should be placed inthe original position employed for makingcycloduction test, as previously explained(Fig. 37). This causes the patient to see butone band or vertical streak (Fig. 38). The Maddox rod, placed before the righteye, should be slowly rotated inward fromninety degrees to a point on the scale where thesingle streak of light breaks, when it shouldagain be returned to ninety degrees. Thiscau
. Refraction and muscular imbalance, as simplified through the use of the ski-optometer. muscles having been pre-viously detailed. To exercise the oblique muscles of the righteye, both Maddox rods should be placed inthe original position employed for makingcycloduction test, as previously explained(Fig. 37). This causes the patient to see butone band or vertical streak (Fig. 38). The Maddox rod, placed before the righteye, should be slowly rotated inward fromninety degrees to a point on the scale where thesingle streak of light breaks, when it shouldagain be returned to ninety degrees. Thiscauses a contraction and relaxation of the mus-cles in the form of an exercise and should berepeated ten times—about five minutes eachday. By employing the Maddox rod before [102] Refraction and Muscular Imbalance the left eye in precisely the same manner, itsoblique muscles will be exercised. To determine whether or not this form ofexercise is beneficial to the patient, the weeklycycloduction test, as previously described,should be made and compared with the origi-nal findings. [103]. A Co?npactPhorometer andTrial Frame. Ski-optometer Model 235 For Testing and Correcting Muscular Imbalance-Providing a Comfortable Form of Trial Frame. [104] Chapter XV MOVEMENTS OF THE EYEBALLS ANDTHEIR ANOMALIES A FTER a careful study of the foregoing^chapters, the refractionist may desirefurther knowledge concerning muscular im-balance—a matter in which the Ski-optometerplays an exceptionally important part. It should be remembered that it is only thegeneral utility of the instrument, plus onesknowledge of refraction and individual diag-nosis that enables the refractionist to attainmaximum efficiency in every examination, afact which largely accounts for the followingchapter. Monocular Fixation When we view an object directly, so that itappears to be more distinct than surroundingobjects, we are said to fix or fixate it. As the fovea is normally the most sensitivepart of the retina, affording
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