FFR affects the brain.

[Yuruka]

It does effect your vision in a way, the arrows can hypnotize you the same way as staring into a spiral can. Only sometimes this happens..Like if you just stare at one place and watch the arrows going up. The same affect can happen when playing guitar hero and rock band.

But no one cares about rock band.

No one cares that I said effect and affect. But that's another story ;D