But you may wish to judge by yourself, contemplating alternative pictures like the one below. Matt's work is excellent, but of course you wouldn't expect anyone to invest in finding the truth or searching for health, when multi-million dollars worth of iris tagging is to be performed while you read this. Anyway, on this site you'll always see the whole story behind the silver curtains. Dermatoglyphs, well known markers of individual genetic expressions may be invariant in time. But the irides, which represent altogether different epigenetic outcomes of the neural crest cells, do change in time.
Irides behave naturally, being marvelous organs in all respects.
Moreover, we planned from our own startup's beginning to carefully record, archive and analyze changes in iris patterns. We still do it, according to more refined and for ever more complete medical evaluations of the health events that were simultaneous with, and possibly not independent of such changes in iris patterns. The iris crypt highlighted in the iris image here definitely changed. Moreover, the modification was measurable. Matt's legend speaks for itself.