While accepting that the jury has more information than us, I think it's reasonable to ask if the woman being partially sighted means that it's less likely that she could judge an arm wave such as to deliberately hit a cyclist, though there seems to be no clear answer as to if contact was made, in which case disability would have a bearing on what happened.
Not being able to see or move quickly might make someone more anxious which in turn could make someone react angrily.
As for leaving the scene, I knew someone who saw their girlfriend get run over, she was severely injured and was taken to hospital by ambulance, and he then came into work. Clearly in shock, he told a colleague what had happened and got sent home. Sometimes (not saying in this case, just generally) you just follow your routine automatically.
But as I said, the jury will know more than us.