People have made some decent logical arguments for why eye shine, not merely reflection, won't work. The problem with this is there are quite a few reports incorporating such detail. Not pointing this at anyone, just making a philosophical statement: if you really want me mad, tell me I didn't see what I just saw. I'll put up with a lot, but not that. I haven't seen that myself, but if I do, and someone tells me I didn't, they're going to need some dental reconstruction. That's just how it is.
However, I agree with the illogic, so to address the apparent dichotomy between perceived reality and perceived report, we need a mechanism, right?
What if BF don't see in the part of the spectrum the beams are projected in, but instead only see when that light causes something to flouresce in a spectrum they can see? Just like us taking a UV flashlight out. If it's true UV, we don't see it (though we may get eye strain), but we can see how it causes various minerals in rocks to "light up" visibly to us.
Or what about polarizing lenses? What if their eye has structures that keep them from being blinded by light shining out so they only see what is reflected back?
Bobby_O posted a link to an interview with one of the BFRO guys from Washington. I believe he said the eye shine (not reflection) he saw was not from the pupils, it was from the outer part of the eye. "Hmmmm."
I dunno ... just brainstorming. Probably enough holes to sink a sieve but y' gotta start somewhere.
MIB