here it is !
Here is the EU-ops definition of the Visual approach. An approach when either part or all of an instrument approach procedure is not completed and the approach is executed with visual reference to the terrain. my commentary from here : terrain is ground NOT airfield nor runway
Here is the minimum required visibility for a Visual Approach. An operator shall not use an RVR of less than 800 m for a visual approach
that's it !
even lighter than ICAO rules