Surg tech with about 8 years experience - never heard of this one. Some of the shit we do…

Anyway, image search at your own risk. Here’s the least nightmare-fuel image I could find:

…so we basically use tooth tissue to replace the iris? Seems like something we could just use a specialized contact lens for, without needing to graft an actual biologic… then again, maybe that’s why I’ve never heard of it :P