I'm thinking BULLSHIT on this being an "accident".
First of all, these seems to happen quite frequently - does he have one of those go pro cameras on his helmet on case of accident? I think they are a thing as otherwise there's no proof and he could be lying.
And secondly, why is only the one eye and surrounding area cut and bruised?
Nah, I don't buy it - I wonder if he's either been in a fight and they're saying it's a bike "accident" for compo or he has come off the bike because he's an idiot and think he owns the road like so many cyclists, so they're cooking this up between them for the compo, nothing would surprise me in that house.