One possible option to help visibility, make the whole section from the chin protrusion to the eyes out of yellow tinted plexi then do a mist coat of gold paint over it. If you get the paint light enough you can still see through it, all be it not perfectly. I've seen some guys that have had the whole helmet to include faceshield painted, they say it's like a tinted shield with a little blurring. If your main vision is through the slots it would be periferal vision through the painted area. Just my 2 bits.