The present invention teaches observing and charting the iris structure of an individual participant. The data can then be evaluated using one or more algorithms. The object of the evaluation can include an assessment of the individual compatibility and personal attraction to others, including others whom also have been similarly evaluated. The evaluation can be compared with the evaluations of other individuals. The invention can be practiced in conjunction with other bio-markers. The invention includes recording the observed and charted information. A database of information can be created of the individual, including information relating to the iris as well as medical/health information, family history and socioeconomic information. A database of numerous individuals can be created. The accuracy of the evaluation can be assessed by other data collection and the evaluative factors modified accordingly. The invention may facilitate selection of couples for meaningful long-term relationships.