Reliability of Iris scanning

Iridology or iris diagnosis as defined by Dr. James Carter is based on the premise that each organ or tissue in the body has a corresponding locus and pattern within the iris. Changes in texture, pigmentation, and density of the iris pattern reflecting changes in balance and/or disease states of that organ.
Like many other airports the Winnipeg International airport will soon have the CANPASS Air security system where passengers will be screened by verifying an image of their iris from a database.
If Carter's premise is correct than a iris cardholder with a security risk can by altering the functions of one of his organs may vbe able to alter sufficiently the iris pattern from that present in his card so that he no longer will be detected as a risk and will to be able to get pass the security gate.