I'm a regular contact lens wearer and the last couple of years I have bought the Wild Eyes lenses. Last year it was the "white out" version. The look was great, but there were some inconveniences...
1. First, in dim light (and many of us encounter dim lighting in the Halloween season!), your pupils expand to let more light into your eyes. The translucent center of the theatrical lens stays the same size, and so will be smaller than your pupil. This will impair your night vision a little, as well as put a fuzzy ring of white (or whatever color the lens is) around your field of vision. This takes some getting used to. The first time I wore them, I was as drunk as could be - so between the lenses and the alcohol, I had some pretty bad tunnel vision.
2. The "white outs" looked a bit blue in my eyes too, but my eyes are dark brown....
3. I let my lenses sit in no-rub lens cleaner for a few moths between Ironstock and Halloween. When I took them out of the case on Halloween, I gave them a light rub to just make sure they were clean. (Regular contact lens wearers will tell you that clean contacts are much more likely to be comfortable in the eye than even slightly dirty contacts). That was a mistake. The color rubbed off half of one of my lenses before I realized what was going on. This actually turned out to be a neat effect (SEE PHOTO BELOW), but it wasn't the effect I had intended. DON'T RUB THESE LENSES.
I bought the fiery red lenses this year but haven't tried them on yet. The nice thing was that I had some cash left over on last years Health Savings Account that I was going to lose if I didn't spend it, but after a little creative paperwork I managed to use that money to pay for these contacts.