I've taken more than 3 ounces of contact lens solution through a dozen airports in the last few years and never had a problem. I think there's an unofficial policy to let them through unless there's some other reason to be suspicious.
Ah, thanks for the info. That's just further proof that it's security theater: if they can't tell the difference between water and liquid explosives, how do they know that what's in the bottle is actually contact solution?
