According to their website, the image is normalised in such a way that taking multiple pictures of the same iris, even under vastly different lighting conditions, will always generate the same hash.

The data collection may well be nefarious, but this is hatchling spying on people. It's roughly equivalent to having desks with fingerprint scanners. You won't be scanned unwittingly and against your will. It's not even remotely possible, from a technical point of view.