Not a helmet review but prescription goggles.
As a spectacle wearer I find an open face helmet a pain - anything over 40mph and the wind comes rushing aroud my glasses giving me watery, blurred vision.
I ordered a pair of the Davida WRS74 goggles complete with my prescription and they arrived within a week -all for less than £120.
Not only can I now see clearly but they also react with the light so that I have clear lenses at night and sunglass lenses for those rare sunny days.
They are very well made and have made such a difference, I don't know how I managed without them.