Beerdrinker asked about noting visibilty and converting it to RVR. All the nice ATCOs related the question to Human Observer method, which is still available at many airfields.
There is a procedure to take the visibility given and factor it to obtain an "RVR" but this is only available to pilots, subject to any company rules. Controllers would only pass an RVR obtained by an approved method or the relevant Met vis.
Don't know any AFISO unit with RVR so a FISO would only pass Met vis and let the pilot factor it. Worrying that, flying and doing maths all at the same time!