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(A) Reporting on postural stability, means of the surface area of the center of pressure excursions (mm2) for each subject for each condition with jewelry, when jewelry is removed and when on average 3weeks later the check is done. Eyes open (EO), eyes closed (EC), and EO with a prism to cancel the vertical heterophoria (EO+PC). Triangle symbols indicate EO control data from the study of Matheron and Kapoula (2008) of healthy subjects with vertical orthophoria, and with no jewelry or back pain. (B) Results for Subject 3 who agreed to put the jewelry back on temporarily during the second session.