He has poor vision in one eye, that's why he sometimes gets clipped too much and has some issues with the other eye as well. He had a problem with the other eye back when they examined it in Canada. If he will continue to box he can go blind.
I can't believe I remember a time when Drummond had a bit of hype behind him, and Chagaev was still relevant.
Probably worth the admission price if you're keen to see a brutal KO, but not if you're in the market for a competitive heavyweight fight. Undercard looks weak to me but then I'm pretty ignorant on the local Montreal scene, could be decent/entertaining matchmaking for all I know.