“hopefully a helmet company can make shields that have prescription lenses built in”
I doubt that we will see that in the near future. but the Pinlock type system may be the way they can go about doing that. I have kind of gotten used to the air mask. At first I found it distracting, but the more I use it the more I get used to wearing it.
I currently only have a generic one that is made for the HJC helmets as they didn’t have one for the Shoei RF1100 at the time. It is OK, but it bunches up a little at times since uses velcro to attach to the cheek pads. Shoei claims they have the accessories for the RF-1100 now, but you have to call them. I will probably do that. Another option that looks nice, and much more flexible at least than the HJC is the Respro Foggy Mask http://www.respro.com/products/urban-commuting/motorcycling/foggy_mask/
I will get some photos posted this weekend if I can.