Well, I thought I'd give this a try back earlier on probation and it worked, but I got caught through a 2 sided mirror my third time doing it... which wasn't great, but I'm off probation now :)
Erowid Drug Testing Vaults : Misc Info
Read that carefully, basicaly you need to use a certain amount of visine depending on your urine sample size, it elaborates how much visine you should use very well, I used 6 ML on each sample and passed without a contamination complant because you're using the cutoff level meaning that there's a small chance of them finding the visine.
Shit I'm just a stoner I'm not gonna get all complex but have a good one :stoned:..