It appears that Froome is fixated on his power meter when he rides, but he explains it here:
"If people aren’t talking about Chris Froome’s performances, they’re talking about his look when he’s riding the bike.
You know that position he holds, one elbow jutting out at a weird angle, his head bowed and eyes apparently firmly fixed on his power meter display during the most gruelling efforts.
Sky has a renowned foundation in sports science so it would be fitting if Froome was looking at the numbers tick over, as a means of clinically gauging his performance in critical moments during races.
However, Froome admits that’s not the case. “I’m not looking at anything, I just find my neck gets [sore] if I look up,” he reveals.
“For some reason I feel when I look down I’m able to breathe a lot easier. I don’t know, maybe it’s just me, but I feel it’s a much more comfortable position to do really hard efforts.
“Obviously when I look down I can see at least a good five metres in front of me,” he adds quickly with a laugh. “I do need to keep looking up to check!”
From Cycle Sport/Cycling Weekly magazine.