I found this thread while searching for an answer to the same question.
I just had to reply. An awful lot of you guys are kind of douchebags. All of you people who replied calling the original poster "paranoid", etc, should not have responded at all, if you had nothing productive to add to the conversation.
The fact is, the original poster is *not* being paranoid, and is completely correct in what he is saying. It's a very good question, and it would have been nice if someone had actually tried to answer it rather than hurling insults at the OP.
I've done pretty much every chemical on the planet (as is probably the case with many here), and even though I can act astonishingly normal and social while on heavy opiates, my pupils become extremely constricted. It looks straight up *WEIRD*. Definitely on par, in terms of abnormality, with having owl eyes from doing molly. Frankly, appearance-wise, I can fool people more easily on pot/molly/whatever else than I can on heroin/opana/oxys/etc. It's not paranoia; as soon as my girlfriend or any friend who's ever done a drug sees me on these drugs, they know... instantly. Furthermore, police and other individuals are routinely trained to look for constricted pupils at car stops and other times, especially in areas with relatively high opiate use.
So, stop calling the OP names. There's definitely a legitimate need for something that can counteract the pupil constriction.
I wish I had some helpful ideas in that regard, but I don't have much. I have found that hitting the eyeballs with around double the normal dose of antihistamine eye drops (e.g., Visine Antihistimine, or other brands/models targeted towards allergies rather than merely redness), helps a little bit. Slightly more helpful is hitting a decent dose of caffeine; not too much, though, or you'll ruin your high by reintroducing anxiety/etc. Lastly, and this one isn't a convenient option at all, but MDMA and other heavy stimulants will definitely dilate the pupils, but then you're kind of defeating the point in terms of the high.
It would be nice to find an option that will dilate the pupil slightly, but not have any systemic effect. I know such things are available to physicians, but I've not heard of anything OTC.