The eyelashes will always be projected somewhere, and if they aren't modelled then they will be projected onto the first bit of mesh that gets in the way.
The answers would be something like one of the following:
1. mask out eyelashes from each photo in which they occlude part of the face that shouldn't have eyelashes projected onto it.
2. edit the texture in photoshop etc afterwards
3. shave eyelashes before scanning
4. meticulously model each eyelash