in vivo method in vivo visual assessment 2010-11-01T12:39:26Z A procedure or technique performed in or on a living body, for example, a procedure performed on an organ in situ or on the entire living organism, by which a morphological or physiological state or property of that body or body part is evaluated, appraised or perceived through the sense of sight, rather than through the use of instruments or machines to make measurements. MMO:0000163 measurement_method_ontology mshimoyama