Skull, what I mean is as the FOV is already restricted due to your view point being a single monitor, rather than your eyes, as it would be in RL, an additional viewpoint restriction would be unnecessary and prohibitive, except in the cases of bucket helms and similar, where your FOV is more restricted than it is by the monitor, and that could be done with depictions of eyeholes etc. I agree with the option of lifting the helmet, which works for helmets with visors, and I believe it was common practice for many soldiers with those helmets to have their visors up most of the time anyway, unless it was seriously hairy, just so they could see. Having a well protected head is pointless if you can't see the peasant with the spear poking into the chink in your armour.