Blacktip pointed out that something could knock my wife's mask off and wash out her contact lenses. That was exactly my point to my wife when she first started wearing her lenses.
Her rebuttal was as follows (without the epithets):
1. I use disposable contact lenses, so no great loss if I lose a lens.
2. If I lose my mask, I can't see anyway, so I will just go up.
3. If I can get my mask back on, but lose the lens, I will just complete the dive with blurry vision--which I am doing already since you are too cheap to buy me a prescription mask.
4. You are an idiot--leave me alone.
Well, I had to agree with her logic in 1-3, and #4 was not debatable. Further, she knows more than I do on most subjects even if, as is the case here, I have 4 or 5 times the experience. And a final point is that, since she is my primary dive buddy on sport dives, someone has to read my gauges because I can't see them anymore.
P.S. For what it's worth Rx-safety will build and deliver a prescription mask for $150-$160. Caveat: you have to buy their mask, so it's not clear how you make sure it fits your face. I buy safety glasses from them (but never have bought a mask) and their delivery time is about 4 weeks, give or take. See their site at http://www.rx-safety.com/Scuba-Masks/index.htm