It becomes more and more common to find commuters bike helmets with integrated visors (the transparent "plate" in front of the eyes). Provided that the shape of the visor is compatible with prescription glasses, do they provide an improvement in visibility for those who wear prescription classes when riding in the rain and/or in cold weather - water drops on the classesglasses, and/or steam? (I imagine that the lack of direct contact between the glasses and the air limits the drop of temperature of the lenses, and hence limits condensation.)
If yes, are there key features for the visor to pay attention to?
(example of such helmet - not an endorsement though)