Well then it depends on when ATC advised the updated RVR's, what type of approach you were planning, were LVP's in force if the RVR was above Cat 1? etc
it's all in the timing......
But it's still simple. If while conducting an LVP approach to Cat 3B/3/2 and you suffer an equipment failure the approach can ONLY continue or commence IF the reporter RVR's are at or above the new degraded capability at the time of the failure. If in your case the RVR's were above Cat 1 to start with then I'd suggest you don't get an update on the RVR's because you may not like what you hear!!