But outside observation, and the use of ring flashes, Dr. Rubin has little methodological novelty to offer. In fact, he reviews topographical regions and case histories only. On the positive side, Dr. Rubin systematically analyzes hospitalized patients, more documented patient data, and even many iris patterns in newborns. All in all, Dr Rubin's approach is almost as valuable, but less interesting than Vida's and Deck's. Iris charts are jealously protected in an understandable if abhorred way, because they might represent a given practitioner's main source of unique revenue.
Comparisons face such drags.