The same is true for retina print (eye print) checks. It does take a better camera (20M pixel), and it may require a brief *infrared* flash (so you will *not* notice it), but it will allow one to copy the retina prints from everyone looking in the camera's direction, and they are most often good enough to confuse retina scanners into accepting a false eye as valid.
Biometry may be useful as a 2FA/3FA, but it really isn't "safe" by itself.
Uh, that would be iris scans, right? If someone is reading your retina, it's not from more than a couple of centimeters in front of your eye.