Well, a runway in the US which is serviced by an RVR system will usually have landing minimums as low as RVR18 or RVR24 (RVR800m = RVR2600ft if I remember correctly). Taking that into account you are legal to start the approach and fly an ILS to that runway for the landing. Furthermore, having the runway lights in sight you're legal to 100 feet above touchdown, and from then on, having the runway itself in sight you are legal to land. So I don't see this as an issue at the typical runway serviced by an RVR system in the US. Furthermore, controllers will be simply report prevailing visibility and not pass on RVR information when it is erroneous (given the circumstances).
Last edited by aviatorhi; 12th Feb 2013 at 22:59.