I don't know if you have an organization around you or not, but be careful. If your software is actually producing some sort of a quantitative or even qualititative "you have this visual defect or not" then the FDA may very well consider you a Medical Device and you'll have to go through submission, etc.
There are a lot of small businesses out there that are unwittingly (and illegally) producing medical devices and don't even know it (yet!).