Eye color for a plausible argument stating that some eyes can or do change, based on chemical reactions and hormonal changes within the body. Studies on Caucasian twins, both fraternal and identical, have shown that eye color over time can be subject to change, and major demelanization of the iris may also be genetically determined. Most eye-color changes have been observed or reported in the Caucasian population with hazel and amber eyes. Carleton Coon created a chart by the original Martin scale. The numbering is reversed on the scale below in the (later) Martin–Schultz scale, which is (still) used in physical anthropology.
Cyborg anthropology can be used to represent and undertake research. Cyborg anthropology also looks at disciplines like genetics and nanotechnology, which are not strictly digital. Cybernetics/informatics covers the range of cyborg advances better than the label digital. Questions of subjectivity, agency, actors, and structures have always been of interest in social and cultural anthropology. In cyborg anthropology the question of what type of cybernetic system constitutes an actor/subject becomes all the more important. Is it the actual technology that acts on humanity (the Internet), the general techno-culture (Silicon Valley), government sanctions (net neutrality), specific innovative humans (Steve Jobs), or some type of