Considering I've had a lot of laser treatments (micro-veins) and am getting eye (retina) surgery before long, it makes me wonder how reliable such a system is,

Considering I've had a lot of laser treatments (micro-veins) and am getting eye (retina) surgery before long, it makes me wonder how reliable such a system is, and how well it will tollerate change/variance of one's eye-prints. I mean, theoretically, if you lose your eye in an accident, does that mean you lose your life savings in such a scheme? It really has me concerned. As fallible as people and banking are already, I'm not sure I'm ready for that level of "secure" without such considerations.