Again, I really do not think the trait is heritable. Think in terms of humans or other "animals." If two blind persons have children, not all of their children are blind. In most cases, I think none are. Likely there is just something that happened during the incubation period that caused this, maybe a lack of some need mineral, some sort of trauma, anything. I talked with Don Soderberg a little tonight and he said he hatches at least one eyeless snake a year (typically) and so far that none of them have reproduced eyeless progeny. BTW, the one I mentioned he had sent me pics of was a Miami phase not charcoal and it is not 3 years old with no issues, he eats, pops and moves normally per Don.
To answer your question, let's pretend this was a simple recessive trait. In that case, the breeder should act responsibly and advertise the animal as "het eyeless" much the same as a breeder would advertise "het hypo or het bloodred." There would be no reason to hide the genetics. However, if it were simple recessicve, then I can see the same concern you have for "possible het" eyeless corns. Maybe someone has possible hets and doesn't advertise them because he doesn't think it is a big deal, then it could be passed by the purchaser inadvertantly (assuming he got a definite het from his possible het). Make sense? So yours is a valid concern much like when people post photos of their animals produced by unknown hets.
dc
