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White paper documents iris color change linked to autonomic activation in a unique research subject, suggesting a new optical marker.
This white paper documents a subject-reported iris phenomenon in the provisional Rh-null Apache-Azteca-Spaniard research subject ("Apache Woman"), in which light brown eyes appear green during crying episodes. The paper frames this as a dynamic optical-autonomic event rather than a fixed pigmentation change, distinguishing baseline iris color from state-dependent appearance mediated by tear film optics, pupil dynamics, and lighting-angle effects. Iris melanocyte innervation by sympathetic and parasympathetic pathways is discussed as a plausible mechanism linking the visual shift to autonomic activation state, positioning the observation as a potential visible threshold marker within the broader Bio-EM Power of Love framework. CC-By 4.0. Clean hypothesis date: April 7, 2026.
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jeremy ryan thompson (2026) studied this question.
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